EP4544740A1 - Procédé de suspension d'un jeton de certification permettant d'authentifier l'établissement d'une connexion entre deux équipements de communication, dispositifs et programmes d'ordinateur correspondants - Google Patents
Procédé de suspension d'un jeton de certification permettant d'authentifier l'établissement d'une connexion entre deux équipements de communication, dispositifs et programmes d'ordinateur correspondantsInfo
- Publication number
- EP4544740A1 EP4544740A1 EP23734539.2A EP23734539A EP4544740A1 EP 4544740 A1 EP4544740 A1 EP 4544740A1 EP 23734539 A EP23734539 A EP 23734539A EP 4544740 A1 EP4544740 A1 EP 4544740A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- certificate
- certification token
- equipment
- server
- certification
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
- H04L63/0823—Network architectures or network communication protocols for network security for authentication of entities using certificates
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/44—Program or device authentication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
- H04L63/0807—Network architectures or network communication protocols for network security for authentication of entities using tickets, e.g. Kerberos
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
- H04L63/0876—Network architectures or network communication protocols for network security for authentication of entities based on the identity of the terminal or configuration, e.g. MAC address, hardware or software configuration or device fingerprint
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/08—Access security
Definitions
- TITLE Method for suspending a certification token making it possible to authenticate the establishment of a connection between two corresponding communication equipment, devices and computer programs
- the field of the invention is that of the certification of equipment connected to a communications network. More specifically, the invention relates to a solution for managing the suspension of a certificate associated with equipment in an “edge computing” or network edge computing environment.
- edge computing or computing at the edge of the network and consists of processing data at the edge of the network as close as possible to the source of the data.
- “Edge computing” thus makes it possible to minimize bandwidth requirements between equipment, such as sensors, and data processing centers by undertaking analyzes as close as possible to the data sources. This approach requires mobilizing resources that may not be permanently connected to a network, such as laptops, smartphones, tablets or sensors. “Edge computing” also has a place of choice in content ingestion and delivery solutions. In this regard, many content delivery network or CDN (Content Delivery Network) architectures are based on “edge computing” type architectures.
- CDN Content Delivery Network
- a known implementation of such an “edge computing” type architecture is an architecture known under the name Kubernetes.
- FIG. 1 presents in a simplified manner the architecture of a cluster of nodes 1 compliant with the Kubernetes solution.
- the cluster of nodes 1 includes a first node 10 called the management node, or “Kubernetes master”, and N computing nodes, or “workers node”, lli, i e ⁇ 1, N ⁇ , N being a natural integer.
- the management node 10 includes a controller 101, an API (Application Programming Interface) module 102 and a database 103 called ETCD (name of the main Kubernetes database, storing the system configurations or distributed machine clusters) which consists of a dynamic configuration register of the computing nodes lli.
- API Application Programming Interface
- ETCD database 103
- a calculation node lli includes M containers or “pods” 110j, j e ⁇ 1, ..., M ⁇ , M being a natural number.
- Each 110j container is equipped with resources allowing the execution of one or more tasks.
- a task when executed contributes to the implementation of a network service or function, such as a DHCP (Dynamic Host Configuration Protocol) function for example.
- DHCP Dynamic Host Configuration Protocol
- edge computing architectures are most often multi-site architectures in which the nodes constituting the clusters of nodes can be non-co-located.
- a management node 10 and two calculation nodes II, II2 of a cluster of nodes 1 are located on a site A while three other calculation nodes II3, II4, Us are located on a remote site B .
- Existing authentication solutions such as HyperText Transfer Protocol Secure (https), which relies on the introduction of an encryption layer compliant with Secure Socket Layer (SSL) ) or on the introduction of an encryption layer conforming to the TLS (Transport Layer Security) protocol are not well suited to the context of “edge computing”.
- the https protocol allows a visitor's equipment, such as a personal computer, to verify the identity of a website that the visitor wishes to access from their equipment.
- the equipment verifies the identity of a server hosting the website, using a public authentication certificate of type X509 issued by a third-party authority, deemed reliable, to a server providing a service.
- a public authentication certificate of type X509 issued by a third-party authority, deemed reliable, to a server providing a service.
- Such a certificate guarantees the confidentiality and integrity of the data transmitted by the visitor to the server providing a service.
- Such a mode of operation namely the verification of the identity of equipment with which a communication session is intended to be established, cannot meet the needs required for the management of computing nodes. Indeed, such management turns out to be complex because the calculation nodes can be deployed in distributed, even private or even mobile infrastructures, but above all they can be reconfigured, suspended, deleted, reestablished, or even reassigned to another cluster of nodes in functions of the needs to be satisfied. Each of these operations can call into question the validity of the certificates associated with the calculation nodes.
- calculation nodes correspond, from a protocol point of view, to the visitor equipment described in the example described above. We can therefore see that the application of the https solution to an “edge comuting” architecture is not suitable.
- the invention partly meets this need by proposing a method for suspending a first certification token corresponding to a first certificate, said first certification token making it possible to authenticate the establishment of a connection between equipment connected to at least one communication network and at least one server of a service provider, said first certification token and said first certificate being generated from a digest of a physical address of said equipment, a certificate associated with a server for configuring network addresses and at least one network address allocated to said equipment by said network address configuration server.
- Such a method is particular in that it comprises the following steps implemented by said certificate creation module:
- the solution which is the subject of the present invention makes it possible not to systematically revoke a certificate when the equipment is reconfigured, suspended, corrupted or, when it is mobile equipment, when it changes network. access or access technology.
- This solution proposes to suspend a certification token corresponding to a certificate associated with the equipment instead of revoking it. It is then no longer necessary to carry out all the steps necessary to obtain a new certificate. This makes it possible to reduce the number of exchanges relating to the management of this certificate for such equipment, which is particularly interesting in a context of “edge computing” where agility is essential.
- Such a certificate creation module can be co-located with the configuration server or with the domain name server, in which an association of said certificate with at least one domain name provided by the configuration server is stored.
- the equipment can be allocated a plurality of network addresses, or "address pool"
- the first certification token is associated with all or part of this address pool.
- the same equipment can simultaneously have several certificates and corresponding certification tokens.
- Such a configuration token makes it possible to verify the authenticity and integrity of a certificate associated with the equipment and thus authorize the establishment of a connection with the equipment.
- Establishing such a connection corresponds, for example, to the integration of the equipment into a Kubernetes architecture as a computing node.
- the method further comprises the following steps:
- the equipment is mobile equipment, such as a smartphone, in a mobility situation.
- the first certification token associated with the equipment is for example used when the latter is attached to a home network.
- the first certification token is suspended.
- the equipment re-attaches to the home network, such as when the smartphone user returns home, the suspension of the first certification token can be lifted, allowing the smartphone to access the server of a provider of service without having to request a certificate again.
- the equipment has a second certificate and therefore a second certification token
- the first certification token is suspended, and the second token certification, which is intended for use when the equipment is attached, for example, to a fifth generation or 5G radio network, is used independently by the second network.
- the suspension of the first certification token can be lifted and the second certification token is suspended.
- the method further comprises the following steps when the condition of suspension of said first certification token is accompanied by a request for replacement of said first certification token:
- the second certification token can also provide restricted access to a service provider's server resources.
- the second certification token contributes to the establishment of a “sandbox” by limiting the equipment's access to certain services or by isolating traffic linked to this service to or from the equipment.
- the method further comprises a step of sending, to the network address configuration server, a request to supply, to said equipment, at least a network address pointing to a host machine acting as a dummy server of the provider.
- the network address provided to the equipment is a so-called “black hole” network address which does not allow the routing of traffic to the equipment or does not allow the transmission of traffic from the equipment to the service provider's server but indicates to a router that this traffic may be routed to other dedicated equipment suitable for processing data originating from/intended for potentially corrupted equipment, or that this traffic may not be routed at all.
- condition of suspension of said first certification token belongs to a group comprising:
- the invention also relates to a certificate creation module adapted to suspend a first certification token corresponding to a first certificate, said first certification token making it possible to authenticate the establishment of a connection between equipment connected to at least one network communication and at least one server of a service provider, said first certification token and said first certificate being generated by said certificate creation module from a digest of a physical address of said equipment, a certificate associated with a network address configuration server and at least one network address allocated to said equipment by said network address configuration server, said certificate creation module comprising at least one processor configured to: - suspend said first certification token following obtaining information relating to a condition for suspending said first certification token,
- the invention also relates to a network address configuration server comprising at least one certificate creation module adapted to suspend a first certification token corresponding to a first certificate, said first certification token making it possible to authenticate the establishment of a connection between equipment connected to at least one communication network and at least one server of a service provider, said first certification token and said first certificate being generated by said certificate creation module from a condensed form of a physical address of said equipment, of a certificate associated with said network address configuration server and of at least one network address allocated to said equipment by said network address configuration server, said certificate creation module comprising at least one processor configured to:
- the invention finally relates to a computer program product comprising program code instructions for implementing a method as described above, when executed by a processor.
- the invention also relates to a computer-readable recording medium on which is recorded a computer program comprising program code instructions for executing the steps of the method according to the invention as described above.
- Such a recording medium can be any entity or device capable of storing the program.
- the medium may comprise a storage means, such as a ROM, for example a CD ROM or a microelectronic circuit ROM, or even a magnetic recording means, for example a USB key or a hard disk.
- such a recording medium may be a transmissible medium such as an electrical or optical signal, which may be conveyed via an electrical or optical cable, by radio or by other means, so that the program computer it contains can be executed remotely.
- the program according to the invention can in particular be downloaded onto a network, for example the Internet network.
- the recording medium may be an integrated circuit in which the program is incorporated, the circuit being adapted to execute or to be used in the execution of the method which is the subject of the aforementioned invention.
- FIG. 1 this figure represents in a simplified manner the architecture of a cluster of nodes
- FIG. 5 this figure represents the different steps implemented by the different equipment constituting the system described with reference to Figure 2 in a first embodiment of the method of suspending a certification token according to the invention
- FIG. 6 this figure represents the different steps implemented by the different equipment constituting the system described with reference to Figure 2 in a second embodiment of the method of suspending a certification token according to the invention
- FIG. 7 this figure represents the different steps implemented by the different equipment constituting the system described with reference to Figure 2 in a third embodiment of the method of suspending a certification token according to the invention
- fig- 8 this figure represents equipment capable of implementing the method of authenticated establishment of a connection between equipment connected to at least one communication network and a server of a service provider which is the subject of this present invention
- fig- 9 this figure represents a creation module capable of implementing the different processes which are the subject of the present invention.
- the general principle of the invention concerns the management of a certificate, in particular but not exclusively, for equipment located in an “edge computing” type environment or computing at the edge of the network during the operation of said equipment.
- the invention proposes a mechanism for suspending a certification token corresponding to a certificate associated with said equipment. This suspension mechanism avoids having to revoke a certificate associated with the equipment temporarily, for example because the equipment is in a mobile situation, or because it has been reconfigured, or even for the duration of check suspicion of corruption, etc.
- Such a system comprises at least one piece of equipment 10 connected to at least one communication network (not shown in the figures), at least one network address configuration server 11, such as a DHCP server (Dynamic Hosts Configuration Protocol or protocol dynamic host configuration), at least one certificate creation module 12, at least one domain name server 13 such as a DNS server and at least one server from an independent service provider 14, or not, of the communications network operator.
- network address configuration server 11 such as a DHCP server (Dynamic Hosts Configuration Protocol or protocol dynamic host configuration)
- certificate creation module 12 at least one domain name server 13 such as a DNS server
- DNS server Dynamic Hosts Configuration Protocol or protocol dynamic host configuration
- the equipment 10 can be a mobile terminal, a server, a node, or a container according to the Kubernetes solution, or even a sensor. It may also be virtualized equipment.
- the configuration server 11 and the certificate creation module 12 can be co-located in the same equipment 100 as shown in Figure 2.
- the certificate creation module certificates 12 may be co-located with or integrated into the domain name server 13.
- the certificate creation module 12 can be physically separated from the configuration server 11 and the domain name server 13.
- the equipment 10 seeks to connect to a communications network. To this end, the equipment 10 sends a DHCP Discover request to the configuration server 11 so that the latter allocates one or more network addresses such as IPv4 or IPv6 addresses.
- the configuration server 11 offers, in a conventional manner, one or more network addresses to the equipment 10 via the transmission of a message type DHCP offer.
- the configuration server 11 can implement an ACME-STAR type delegation method or a so-called “Delegated Credentials” method upon receipt of the DHCP Discover request issued by the equipment 10. These methods are described in the document referenced Acme-Star RFC 8739 published by the IETF.
- the delegating equipment 10 to receive, here in a DHCP Offer type message, a possibly condensed temporary certificate calculated on the basis of a private key of the delegating configuration server 11.
- the equipment 10 validates the network address allocation proposal received during step E2 and transmits, to the configuration server 11, a DHCP Request validating network addresses among those proposed and including settings relating to the creation of a certificate.
- a DHCP Request validating network addresses among those proposed and including settings relating to the creation of a certificate.
- Such parameters include among others: a public key PUB_KEY_CPE of the equipment 10, a digest or “hash” HASH_CPE of a physical address of the equipment 10 such as a MAC address (Medium Access Control or access control to the support) as well as a TYP_HASH parameter on how the HASH_CPE digest is calculated.
- the configuration server 11 On receipt of the DHCP Request request, in a step E4, the configuration server 11 processes the information relating to the allocation of network addresses included in this request in a conventional manner. During the processing of this DHCP Request, the configuration server 11 detecting the presence of parameters relating to the creation of a certificate in a field of the DHCP Request, that is to say the public key PUB_KEY_CPE, the digest HASH_CPE or the TYP_HASH parameter, extracts this information and generates a request for creation of a DCC certificate associated with the equipment 10.
- the configuration server 11 detecting the presence of parameters relating to the creation of a certificate in a field of the DHCP Request, that is to say the public key PUB_KEY_CPE, the digest HASH_CPE or the TYP_HASH parameter, extracts this information and generates a request for creation of a DCC certificate associated with the equipment 10.
- the request to create a DCC certificate includes: the public key PUB_KEY_CPE of the equipment 10, the HASH_CPE digest of a physical address of the equipment 10, a CertDHCP certificate associated with the configuration server 11, at least one network address I P_CP E allocated to said equipment 10 by the configuration server 11 during step E4 (or a pool of POOL_IP_CPE network addresses allocated to the equipment 10), and finally the TYP_HASH parameter on the way in which the HASH_CPE digest is calculated.
- the request to create a DCC certificate may also include a domain name, for example "CNT.example.com", with which the certificate is intended to be associated.
- the configuration server transmits the request to create a DCC certificate to the certificate creation module 12.
- the certificate creation module 12 On receipt of the request to create a certificate associated with the equipment 10, the certificate creation module 12 generates, during a step E6, a CERT_CPE certificate associated with the equipment 10 from the information included in the DCC creation request.
- Such a CERT_CPE certificate corresponds to a network address allocated to the equipment 10.
- the certificate creation module 12 creates as many CERT_CPE certificates associated with the equipment 10 as it has network addresses.
- the certificate creation module 12 creates a single CERT_CPE certificate associated with the equipment 10 which applies to the POOL_IP_CPE network address pool allocated to the equipment 10.
- Such a CERT_CPE certificate includes the values of the physical address of the equipment 10 and of one or more network addresses chosen during step E3 by the equipment 10, in fields of the CERT_CPE certificate such as the Common Name (CN) or SAN fields For example.
- CN Common Name
- the certificate creation module 12 also generates a CNT certification token (Certificate Network Token) corresponding to the CERT_CPE certificate associated with the connectivity of the equipment 10 to the network 11.
- a CNT certification token is a compact form of the CERT_CPE certificate associated with the equipment 10. More particularly, this CNT certification token includes, among other things, information relating to the HASH_CPE digest of the physical address of the equipment 10, to the HASH_CERT_CPE digest of the CERT_CPE certificate associated with the equipment 10, and a CN_CM identifier of the certificate creation module 12.
- This CNT certification token which will be used by the equipment 10 in all situations where the latter must provide authentication material to access a service.
- This CNT certification token being a compact form of the CERT_CPE certificate associated with the equipment 10, it can be introduced into numerous existing messages without increasing the payload of the latter in a detrimental manner.
- the implementation of the solution which is the subject of the present invention does not introduce too heavy a load into a communication network.
- the certificate creation module 12 transmits a DAss association request for the CERT_CPE certificate associated with the equipment 10 thus generated with the domain name “CNT.example.com” with which the CERT_CPE certificate is intended to be associated with the domain name server 13.
- Such a DAss association request includes: the CERT_CPE certificate associated with the equipment 10, the corresponding CNT certification token, a HASH_CNT digest of the CNT certification token and a TYP_HASH_CNT parameter on the way in which the HASH_CNT digest is calculated.
- the TYP_HASH_CNT parameter on the way in which the HASH_CNT digest is calculated may include a public key of the certificate creation module 12.
- the domain name server 12 records all of the information included in the DAss association request in a table and associates it with the domain name “CNT.example.com”.
- the domain name server 13 informs the certificate creation module 12 in a step E9.
- the certificate creation module 12 informs the configuration server 11 of the creation of the CERT_CPE certificate associated with the equipment 10 in a step E10. To do this, the certificate creation module 12 transmits to the configuration server 11 a message MSG1 including the corresponding CNT certification token, the HASH_CNT digest of the CNT certification token and the TYP_HASH_CNT parameter on the way in which the HASH_CNT digest is calculated. Finally, the configuration server 11 sends, in an Eli step, an acknowledgment message for assignment of a DHCP ack network address. In an existing field of this DHCP ack message, the equipment 10 adds the corresponding CNT certification token, the HASH_CNT digest of the CNT certification token and the TYP_HASH_CNT parameter on how the HASH_CNT digest is calculated.
- the equipment 10 thus has a CNT certification token which will be used by the equipment 10 in all situations where the latter must provide authentication material to access a service . It will be noted that equipment 10 is not in possession of its CERT_CPE certificate and does not know the domain name “CNT.example.com” associated with its CERT_CPE certificate. These two pieces of information are only stored in the domain name server 12.
- FIG. 4 represents the continuation of the steps of the processes relating to the use of the CNT certification token by the equipment 10.
- a step Gl the equipment 10 wishing to establish a connection with the server of a service provider 14 transmits a Hello TLS client message to the latter.
- the equipment 10 adds the CNT certification token, the HASH_CNT digest of the CNT certification token and the TYP_HASH_CNT parameter on how the HASH_CNT digest is calculated.
- the CNT certification token can be transported by any secure exchange protocol such as the QUIC protocol, in a field of any application protocol such as HTTP transported below any combination of protocols guaranteeing the integrity of the exchange, but also in an OAM field (iOAM) described in https://datatracker.ietf.org/doc/html/draft-ietf-ippm-ioam-data-17.txt
- the server of a service provider 14 obtains the public key PUB_KEY_CM of the certificate creation module 12.
- the public key PUB_KEY_CM is for example a public field of the certificate X509 of the certificate creation module 12 obtained, after step Gl or previously, for example to the establishment of a secure tunnel established between the server of a service provider 14 and the certificate creation module 12, or even pre-recorded in the server.
- the server of a service provider 14 proceeds, in a step G3, to verify the authenticity of the CNT certification token by means of the key public PUB_KEY_CM of the certificate creation module 12 and the HASH_CNT digest of the CNT certification token and TYP_HASH_CNT information on how the HASH_CNT digest is calculated.
- the server of a service provider 14 requests, in a step G4, the domain name server to provide it with the CERT_CPE certificate associated with the CNT certification token that it has just verified. To do this, the server of a service provider 14 sends a DNS Query type message including, in an existing field, the CNT certification token.
- the domain name server 13 returns the CERT_CPE certificate corresponding to the CNT certification token received.
- the server of a service provider 14 then verifies that the CERT_CPE certificate corresponds to the network address(es) provided in the Hello TLS client message, knowing that such a CERT_CPE certificate is delivered for one or more network addresses.
- FIG. 5 represents the different steps implemented by the different equipment constituting the system described with reference to Figure 2 in a first embodiment of the method of suspending a CNT certification token associated with the equipment 10.
- step G6 The implementation of this suspension process may or may not take place following the execution of step G6 during which a connection is established between the equipment 10 and the server of a service provider 14.
- a step Hl the equipment 10 sends, to the configuration server 11, a message requesting the release of the network address(es) allocated to it.
- the sending of such a message to the configuration server 11 can be triggered when the equipment 10 leaves the coverage area of a first access node, such as for example a Wi-Fi access node, to attach to a second access node such as a base station.
- a first access node such as for example a Wi-Fi access node
- a second access node such as a base station.
- such a message is a DHCP Release type message comprising the CNT certification token, the HASH_CNT digest of the CNT certification token and the TYP_HASH_CNT parameter on the way in which the HASH_CNT digest is calculated.
- the equipment 10 transmits a new type of message, called DHCP Suspend.
- DHCP Suspend message also includes the corresponding CNT certification token, the HASH_CNT digest of the CNT certification token, and the TYP_HASH_CNT parameter on how the HASH_CNT digest is calculated.
- the configuration server 11 On receipt of the DHCP Release or DHCP Suspend message, in a step H2, the configuration server 11 processes the information relating to the release of the network addresses included in this request in a conventional manner.
- the configuration server 11 detecting the presence of parameters relating to the CERT_CPE certificate in a field of the message, that is to say the corresponding CNT certification token, the HASH_CNT digest of the CNT certification token and the TYP_HASH_CNT parameter on how the HASH_CNT digest is calculated, extracts this information and generates a request for suspension of the CNT certification token associated with the equipment 10 and the CERT_CPE certificate.
- the very nature of the message indicates to the configuration server 11 that it must extract the parameters relating to the CERT_CPE certificate included in a field of the DHCP Suspend message, that is to say the certification token corresponding CNT, the HASH_CNT digest of the CNT certification token and the TYP_HASH_CNT parameter on how the HASH_CNT digest is calculated, and generate a request for suspension of the CNT certification token associated with the equipment 10 and the CERT_CPE certificate.
- the suspension of the CNT certification token associated with the equipment 10 and the CERT_CPE certificate is triggered after the detection of inactivity of the equipment 10 by the network.
- the request to suspend the CNT certification token includes: the corresponding CNT certification token, the HASH_CNT digest of the CNT certification token, the TYP_HASH_CNT parameter on how the HASH_CNT digest is calculated and the CertDHCP certificate associated with the configuration server 11.
- the request to suspend the CNT certification token may also include the domain name, for example "CNT.example.com", with which the CERT_CPE certificate was associated during step E8.
- the configuration server 11 transmits the request for suspension of the CNT certification token to the certificate creation module 12.
- the certificate creation module 12 optionally proceeds, in a step H4, to verify the authenticity of the CNT certification token by means of the CertDHCP certificate associated with the server configuration 11.
- the certificate creation module 12 transmits, in a step H5, a DSusp suspension request of the association of the CERT_CPE certificate associated with the equipment 10 with the domain name “CNT.example.com” with which the CERT_CPE certificate was associated during step E8 intended for the domain name server 13.
- Such a DSusp suspension request includes: the corresponding CNT certification token, the CERT_CPE certificate and the public key PUB_KEY_CM of the certificate creation module 12.
- the creation module 12 stores in a database that the CERT_CPE certificate and the corresponding CNT certification token are both suspended.
- the domain name server 13 extracts all of the information included in the DSusp suspension request and suspends the association established between on the one hand the CERT_CPE certificate and the corresponding CNT certification token and on the other share the domain name “CNT.example.com”.
- the domain name server 13 informs the certificate creation module 12 in a step H7.
- the certificate creation module 12 informs the configuration server 11 of the suspension of the association between the CERT_CPE certificate and the corresponding CNT certification token and the domain name in a step H8.
- step H8 the equipment 10 wishing to establish a connection with the server of a service provider 14 transmits to the latter a classic Hello TLS client message, that is to say not including a CNT certification token since it has been suspended.
- the server of a service provider 14 then sends a Server Hello message to the equipment 10 indicating that the certificate associated with the equipment 10 is invalid and that a connection cannot be established with the equipment 10.
- the equipment 10 When the equipment 10 needs to lift the suspension of the CNT certification token, for example when it attaches again to the Wi-Fi access node of the first access network, it transmits in a step H9, at destination of the configuration server 11, a message requesting the allocation of one or more network addresses.
- such a message is a DHCP Request type message comprising the CNT certification token suspended during step H6, the HASH_CNT digest of the CNT certification token and the TYP_HASH_CNT parameter on the manner in which the HASH_CNT digest is calculated.
- the equipment 10 sends a new type of message, called DHCP Activate.
- a DHCP Activate message also includes the corresponding CNT certification token, the HASH_CNT digest of the CNT certification token, and the TYP_HASH_CNT parameter on how the HASH_CNT digest is calculated.
- the configuration server 11 processes the information relating to the request for allocation of network addresses included in this request in a conventional manner.
- the configuration server 11 detecting the presence of parameters relating to the CERT_CPE certificate in a field of the message, that is to say the corresponding CNT certification token, the HASH_CNT digest of the CNT certification token and the TYP_HASH_CNT parameter on how the HASH_CNT digest is calculated, extracts this information and generates a request to lift the suspension of the CNT certification token associated with the equipment 10 and the CERT_CPE certificate.
- the very nature of the message indicates to the configuration server 11 that it must extract the parameters relating to the CERT_CPE certificate included in a field of the DHCP Activate message, that is to say the certification token corresponding CNT, the HASH_CNT digest of the CNT certification token and the TYP_HASH_CNT parameter on the way in which the HASH_CNT digest is calculated, and generate a request to lift the suspension of the CNT certification token associated with the equipment 10 and the CERT_CPE certificate.
- the request to lift the suspension of the CNT certification token includes: the corresponding CNT certification token, the HASH_CNT digest of the CNT certification token, the TYP_HASH_CNT parameter on how the HASH_CNT digest is calculated and the CertDHCP certificate associated with the configuration server 11.
- the request to lift the suspension of the CNT certification token may also include the domain name, for example “CNT.example.com”, with which the CERT_CPE certificate was associated during step E8.
- the configuration server 11 transmits the request to lift the suspension of the CNT certification token to the certificate creation module 12.
- the certificate creation module 12 Upon receipt of the request to lift the suspension of the CNT certification token, the certificate creation module 12 optionally proceeds, in a step H12, to verify the authenticity of the CNT certification token by means of the associated CertDHCP certificate to configuration server 11.
- the certificate creation module 12 transmits, in a step H13, a request to lift the DReac suspension of the association of the CERT_CPE certificate associated with the equipment 10 with the domain name “CNT.example. com” with which the CERT_CPE certificate was associated during step E8 intended for the domain name server 13.
- Such a DRéac suspension lifting request includes: the corresponding CNT certification token, the CERT_CPE certificate and the public key PUB_KEY_CM of the certificate creation module 12.
- the creation module 12 stores in a database that the suspension of the CERT_CPE certificate and the corresponding CNT certification token is lifted.
- the domain name server 13 extracts all of the information included in the DRéac suspension lifting request and reestablishes the association between on the one hand the CERT_CPE certificate and the corresponding CNT certification token and on the other hand on the other hand the domain name “CNT.example.com”.
- the domain name server 13 informs the certificate creation module 12 in a step H15.
- the certificate creation module 12 informs the configuration server 11 of the reestablishment of the association between the CERT_CPE certificate and the corresponding CNT certification token and the domain name in a step H16.
- the equipment 10 wishing to establish a connection with the server of a service provider 14 again implements the steps G1 to G6 previously described.
- FIG. 6 represents the different steps implemented by the different equipment constituting the system described with reference to Figure 2 in a second embodiment of the method of suspending a CNT certification token associated with the equipment 10.
- step G6 The implementation of this suspension process may or may not take place following the execution of step G6 during which a connection is established between the equipment 10 and the server of a service provider 14.
- a step SI the expiration of a lifetime associated with one or more network addresses allocated to the equipment 10 triggers the release of these network addresses by the configuration server 11.
- the configuration server 11 receives a request to release the network addresses allocated to the equipment 10 following a decision by the network manager operator.
- the configuration server 11 transmits a request for suspension of the CNT certification token to the certificate creation module 12.
- a suspension request includes the CNT certification token and a code indicating the reasons for this suspension request. .
- the configuration server 11 sends a DHCP NACK message to the equipment 10 in a step S3.
- a DHCP NACK message indicates to the equipment 10 that it is no longer authorized to use the network addresses allocated to it.
- the DHCP NACK message also includes the CNT certification token, the equipment 10 also understands that it is no longer authorized to use this CNT certification token.
- the certificate creation module 12 Upon receipt of the request for suspension of the CNT certification token, the certificate creation module 12 optionally proceeds, in a step S4, to verify the authenticity of the CNT certification token by means of the CertDHCP certificate associated with the server configuration 11.
- the certificate creation module 12 transmits, in a step S5, a DSusp suspension request of the association of the CERT_CPE certificate associated with the equipment 10 with the domain name “CNT.example.com” with which the CERT_CPE certificate was associated during step E8 intended for the domain name server 13.
- Such a DSusp suspension request includes: the corresponding CNT certification token, the CERT_CPE certificate and the public key PUB_KEY_CM of the certificate creation module 12.
- Such a suspension request also includes the code indicating the reasons for this suspension request.
- the creation module 12 stores in a database that the CERT_CPE certificate and the corresponding CNT certification token are suspended.
- the domain name server 13 extracts all of the information included in the DSusp suspension request and suspends the association of the CERT_CPE certificate and the corresponding CNT certification token with the domain name “CNT.example. com”.
- the domain name server 13 informs the certificate creation module 12 in a step S7.
- the certificate creation module 12 informs the configuration server 11 of the suspension of the association between the CERT_CPE certificate and the corresponding CNT certification token and the domain name in a step S8.
- the equipment 10 wishing to establish a connection with the server of a service provider 14 transmits to the latter a Hello client message including the CNT certification token in a step S9.
- the server of a service provider 14 On receipt of this Hello TLS client message, the server of a service provider 14 transmits a DNS Query type message including the CNT certification token to the domain name server 13 in a step S10.
- the domain name server 13 then checks, during a step SU, the validity of the CNT certification token and returns, during a step S12, a message indicating that the CNT certification token is no longer valid.
- the returned message also includes the code indicating the reasons for this suspension.
- the server of a service provider 14 finally sends, in a step S13, a Server Hello message to the equipment 10 indicating that the certificate associated with the equipment 10 is invalid and that a connection cannot be made. not be established with equipment 10, indicating the reasons for this suspension.
- the configuration server 11 receives a request to lift the suspension of the CNT certification token associated with the equipment 10, for example following a decision by the network manager operator.
- a step S15 the configuration server 11 transmits a request to lift the suspension of the CNT certification token to the certificate creation module 12. Such a request to lift the suspension includes the CNT certification token.
- the certificate creation module 12 Upon receipt of the request to lift the suspension of the CNT certification token, the certificate creation module 12 optionally proceeds, in a step S16, to verify the authenticity of the CNT certification token by means of the associated CertDHCP certificate to configuration server 11.
- the certificate creation module 12 transmits, in a step S17, a request to lift the DReac suspension of the association of the CERT_CPE certificate associated with the equipment 10 with the domain name “CNT.example. com” with which the CERT_CPE certificate was associated during step E8 intended for the domain name server 13.
- Such a DRéac suspension lifting request includes the corresponding CNT certification token, the CERT_CPE certificate and the public key PUB_KEY_CM of the certificate creation module 12.
- the creation module 12 stores in a database that the suspension of the CERT_CPE certificate and the corresponding CNT certification token is lifted.
- the domain name server 13 extracts all of the information included in the DRéac suspension lifting request and reestablishes the association between on the one hand the CERT_CPE certificate and the corresponding CNT certification token and on the one hand on the other hand the domain name “CNT.example.com”.
- the domain name server 12 informs the certificate creation module 12 in a step S19.
- the certificate creation module 12 informs the configuration server 11 of the lifting of suspension of the association between the CERT_CPE certificate and the corresponding CNT certification token and the domain name in a step S20.
- step S20 the equipment 10 wishing to establish a connection with the server of a service provider 14 transmits to the latter a Hello client message including the CNT certification token in a step S21.
- the server of a service provider 14 transmits a DNS Query type message including the CNT certification token to the domain name server 13 in a step S22.
- the domain name server 13 then checks the validity of the CNT certification token and returns, during a step S23, a message indicating that the CNT certification token is valid.
- the server of a service provider 14 finally sends, in a step S24, a Server Hello message to the equipment 10, thus establishing a connection with the equipment 10.
- FIG. 7 represents the different steps implemented by the different equipment constituting the system described with reference to Figure 2 in a third embodiment of the method of suspending a CNT certification token associated with the equipment 10.
- step G6 The implementation of this suspension process occurs following the execution of step G6 during which a connection is established between the equipment 10 and the server of a service provider 14.
- the creation module 12 receives a request for replacement of a first certification token CNT1 associated with the equipment 10 from the network management operator.
- a replacement request may be issued for several reasons: the first CNT1 certification token is a temporary certification token that needs to be replaced because it is expiring, the first CNT1 certification token is corrupted or its corruption is suspected, the first CNT1 certification token is hacked or its hacking is suspected, etc.
- the certificate creation module 12 suspends the first certification token CNT1 and the first corresponding certificate CERT1_CPE.
- step F3 carried out before, after or concomitantly with step F2, the certificate creation module 12 generates a second CERT2_CPE certificate associated with the equipment 10.
- the second CERT2_CPE certificate is a classic certificate, the latter is generated from the following information: the public key PUB_KEY_CPE of the equipment 10, the HASH_CPE digest of a physical address of the equipment 10, a CertDHCP certificate associated with the server configuration 11, at least one IP_CPE network address allocated to said equipment 10 by the configuration server 11 during step E4 (or a pool of POOL_IP_CPE network addresses allocated to the equipment 10), and finally the TYP_HASH parameter on how the HASH_CPE digest is calculated.
- the CERT2_CPE certificate is a restricted access certificate, or “black hole” certificate, it is generated from information having no link with the equipment 10 in order to isolate it.
- the certificate creation module 12 also generates a CNT2 or CNTbh certification token corresponding to the CERT2_CPE certificate associated with the equipment 10.
- a CNT2, CNTbh certification token is a compact form of the certificate CERT2_CPE associated with equipment 10.
- the creation module 12 transmits, during a step F4, the second certification token CNT2, CNTbh to the configuration server 11 so that the latter replaces the first certification token CNT1 associated with the equipment 10 by the second CNT2 certification token, CNTbh.
- the reception by the configuration server 11 of the second certification token CNTbh triggers, in a step F5, the allocation of a new network address, called a “black hole” address, to. equipment 10.
- a black hole” address the allocation of a new network address, called a “black hole” address
- the use of such a “black hole” address in exchanges from or to equipment 10 makes it possible to isolate the data exchanged by equipment 10 with other equipment and particularly the server of a service provider 14. More particularly, the data transmitted from or to the equipment 10 by means of this “black hole” address may in a first case not be delivered or, in a second case be routed to dedicated equipment in order to study them with a view to confirming the corruption of the equipment 10.
- step F4 the creation module 12 transmits, in a step F6, a DRemp replacement request for the CERT1_CPE certificate associated with the equipment 10 with the domain name “CNT.example.com” by the second CERT2_CPE certificate intended for the domain name server 13.
- Such a DRemp replacement request includes: the first certification token CNT1, the first certificate CERT1_CPE, the second certification token CNT2, CNTbh, the second certificate CERT2_CPE and the public key PUB_KEY_CM of the certificate creation module 12.
- the creation module 12 stores in a database that the first certificate CERT1_CPE and the first corresponding certification token CNT1 are suspended and replaced by the second certificate CERT2_CPE and the second certification token CNT2, called CNTbh corresponding.
- the domain name server 13 extracts all of the information included in the replacement request DRemp, suspends the association of the first certificate CERT1_CPE and the first corresponding certification token CNT1 with the domain name “CNT. example.com” and proceeds to associate the domain name “CNT.example.com” with the second CERT2_CPE certificate and the second corresponding CNT2, CNTbh certification token.
- a step F8 which can be implemented before, after or at the same time as steps F6 and F7, the configuration server 11 transmits a DHCP ACK message to the equipment 10.
- a DHCP ACK message includes the second CNT2 certification token, CNTbh.
- step F5 was implemented by the configuration server 11, then the DHCP ACK message also includes the “black hole” address.
- step F8 the equipment 10 wishing to establish a connection with the server of a service provider 14, because the connection established at the end of step G6 has been interrupted, transmits to the latter a Hello client message including the certification token CNT2, CNTbh in a step F9.
- the server of a service provider 14 On receipt of this Hello TLS client message, the server of a service provider 14 transmits a DNS Query type message including the certification token CNT2, CNTbh to the domain name server 13 in a step F10.
- the domain name server 13 then checks, during a Fil step, the validity of the certification token CNT2, CNTbh and returns, during a step F12, a message indicating that the certification token CNT2, CNTbh is valid but does not offer restricted access to the server resources of a service provider 14.
- the server of a service provider 14 then sends, in a step F13, a Server Hello message to the equipment 10 indicating that the certificate associated with the equipment 10 is valid and indicating that access to its resources is restricted, thus establishing a connection with the equipment 10.
- the connection established between the equipment 10 and the server of a service provider 14 at the end of step G6 still being in use, the reception by the server of a service provider service 14, during a step F14, of a message transmitted by the equipment 10 and comprising the second certification token CNT2, CNTbh, triggers the transmission, in a step F15, of a DNS Query type message comprising the CNT2, CNTbh certification token intended for domain name server 13.
- the domain name server 13 then checks, during a step F16, the validity of the certification token CNT2, CNTbh and returns, during a step F17, a message indicating that the certification token CNT2, CNTbh is valid but does not offer restricted access to the server resources of a service provider 14.
- the server of a service provider 14 then continues to exchange data with the equipment 10 while respecting the access limitations to the resources of the server of a service provider 14 associated with the second certification token CNT2, CNTbh at during a step F18.
- the scope of the restriction being qualitative or quantitative.
- FIG. 8 represents equipment 10 capable of implementing the method of authenticated establishment of a connection between equipment connected to at least one communication network and a server of a service provider which is the subject of the present invention.
- Equipment 10 may include at least one hardware processor 1001, a storage unit 1002, an interface 1003, and at least one network interface 1004 which are connected together via a bus 1005.
- the constituent elements of the equipment 10 can be connected by means of a connection other than a bus.
- the processor 1001 controls the operations of the equipment 10.
- the storage unit 1002 stores at least one program for the implementation of the different processes which are the subject of the invention to be executed by the processor 1001, and various data, such as parameters used for calculations carried out by the processor 1001, intermediate data of calculations carried out by the processor 1001, etc.
- the processor 1001 may be formed by any known and suitable hardware or software, or by a combination of hardware and software.
- the processor 1001 can be formed by dedicated hardware such as a processing circuit, or by a programmable processing unit such as a Central Processing Unit which executes a program stored in a memory. this one.
- the storage unit 1002 may be formed by any suitable means capable of storing the program(s) and data in a computer-readable manner.
- Examples of storage unit 1002 include non-transitory computer-readable storage media such as solid-state memory devices, and magnetic, optical, or magneto-optical recording media loaded into a read and read unit. 'writing.
- the interface 1003 provides an interface between the equipment 10 and a network address configuration server 11.
- the network interface 1004 provides a connection between the equipment 10 and at least one server of a service provider with which it wishes to establish an authenticated connection.
- FIG. 9 represents a creation module 12 capable of implementing the different processes which are the subject of the present invention.
- a creation module 12 may comprise at least one hardware processor 1201, a storage unit 1202, an interface 1203, and at least one network interface 1204 which are connected together via a bus 1205.
- the elements constituents of the creation module 12 can be connected by means of a connection other than a bus.
- the certificate creation module 12 is embedded in the configuration server 11.
- the processor 1201 controls the operations of the creation module 12.
- the storage unit 1202 stores at least one program for the implementation of the different processes which are objects of the invention to be executed by the processor 1201, and various data, such as parameters used for calculations carried out by the processor 1201, intermediate data of calculations carried out by the processor 1201, etc.
- the processor 1201 may be formed by any known and suitable hardware or software, or by a combination of hardware and software.
- the processor 1201 can be formed by dedicated hardware such as a processing circuit, or by a programmable processing unit such as a Central Processing Unit which executes a program stored in a memory. this one.
- the storage unit 1202 may be formed by any suitable means capable of storing the program(s) and data in a computer-readable manner.
- Examples of storage unit 1202 include non-transitory computer-readable storage media such as solid-state memory devices, and magnetic, optical, or magneto-optical recording media loaded into a read and read unit. 'writing.
- the interface 1203 provides an interface between the creation module 12 and at least one piece of equipment 10 wishing to connect to a communication network.
- the network interface 1204 provides a connection between the creation module 12 and a domain name server 13.
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- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Theoretical Computer Science (AREA)
- Software Systems (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2206199A FR3137238A1 (fr) | 2022-06-22 | 2022-06-22 | Procédé de suspension d’un jeton de certification permettant d’authentifier l’établissement d’une connexion entre deux équipements de communication, dispositifs et programmes d’ordinateur correspondants |
| PCT/EP2023/066499 WO2023247459A1 (fr) | 2022-06-22 | 2023-06-19 | Procédé de suspension d'un jeton de certification permettant d'authentifier l'établissement d'une connexion entre deux équipements de communication, dispositifs et programmes d'ordinateur correspondants |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4544740A1 true EP4544740A1 (fr) | 2025-04-30 |
Family
ID=83594390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23734539.2A Pending EP4544740A1 (fr) | 2022-06-22 | 2023-06-19 | Procédé de suspension d'un jeton de certification permettant d'authentifier l'établissement d'une connexion entre deux équipements de communication, dispositifs et programmes d'ordinateur correspondants |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4544740A1 (fr) |
| FR (1) | FR3137238A1 (fr) |
| WO (1) | WO2023247459A1 (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10805291B2 (en) * | 2015-09-11 | 2020-10-13 | Comcast Cable Communications, Llc | Embedded authentication in a service provider network |
| US10587605B2 (en) * | 2017-06-20 | 2020-03-10 | Citrix Systems, Inc. | Certificate pinning in highly secure network environments using public key certificates obtained from a DHCP (dynamic host configuration protocol) server |
| US11483708B2 (en) * | 2019-02-20 | 2022-10-25 | Apple Inc. | Network access tokens for accessories |
-
2022
- 2022-06-22 FR FR2206199A patent/FR3137238A1/fr not_active Ceased
-
2023
- 2023-06-19 WO PCT/EP2023/066499 patent/WO2023247459A1/fr not_active Ceased
- 2023-06-19 EP EP23734539.2A patent/EP4544740A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3137238A1 (fr) | 2023-12-29 |
| WO2023247459A1 (fr) | 2023-12-28 |
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