CN113067701B - Method and device for updating binding relationship - Google Patents
Method and device for updating binding relationship Download PDFInfo
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- CN113067701B CN113067701B CN202110336157.1A CN202110336157A CN113067701B CN 113067701 B CN113067701 B CN 113067701B CN 202110336157 A CN202110336157 A CN 202110336157A CN 113067701 B CN113067701 B CN 113067701B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
- H04L9/0869—Generation of secret information including derivation or calculation of cryptographic keys or passwords involving random numbers or seeds
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
- H04L9/0822—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using key encryption key
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
- H04L9/0877—Generation of secret information including derivation or calculation of cryptographic keys or passwords using additional device, e.g. trusted platform module [TPM], smartcard, USB or hardware security module [HSM]
Abstract
The invention discloses a method and a device for updating a binding relationship, which relate to the field of communication technical processing, and the method comprises the steps of writing a card plug-in to obtain a random number generated by a card, and encrypting the random number based on a preset encryption algorithm to obtain a session key; based on a preset encryption algorithm, calculating MAC (media access control) values by using the session key to the binding relationship data to obtain a first calculated value, and encrypting the calculated values and the binding relationship data by using the session key to obtain a ciphertext; based on a preset encryption algorithm, the card decrypts the ciphertext by using the session key to obtain a first calculated value and binding relationship data, and calculates the MAC (media access control) of the binding relationship data to obtain a second calculated value; and judging whether the first calculated value is consistent with the second calculated value, if so, modifying the binding relationship of the card based on the binding relationship data, and if not, ending. The invention can simplify the updating process of the card binding relationship and reduce the maintenance cost of the card binding relationship updating of the enterprise to which the card belongs.
Description
Technical Field
The invention relates to the field of communication technology processing, in particular to a method and a device for updating a binding relationship.
Background
In order to prevent a smart card, such as a Subscriber Identity Module (SIM) card, from being lost or stolen, the smart card needs to be bound with a terminal device. However, when the terminal device bound with the card is damaged, or when the user uses the card to test the terminal function, the card can be bound with the test terminal, and if the card is not unbound, the card bound with the terminal device cannot be reused on other terminals.
Therefore, in order to ensure effective use of the card, update processing of the binding relationship of the card, such as unbinding, is required in some cases. However, the current update process for the card binding relationship needs to be performed by a third-party server, so that the update process flow of the binding relationship is complicated, and the maintenance cost of the enterprise to which the card belongs is high.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method and a device for updating a binding relationship, which can simplify the updating process of the card binding relationship and reduce the maintenance cost of an enterprise to which a card belongs for updating the card binding relationship.
In order to achieve the above object, the method for updating a binding relationship provided by the present invention specifically includes the following steps:
the card writing plug-in obtains a random number generated by the card, and encrypts the random number based on a preset encryption algorithm to obtain a session key;
based on a preset encryption algorithm, calculating MAC (media access control) values by using the session key to the binding relationship data to obtain a first calculated value, and encrypting the calculated values and the binding relationship data by using the session key to obtain a ciphertext;
based on a preset encryption algorithm, the card decrypts the ciphertext by using the session key to obtain a first calculated value and binding relationship data, and calculates the MAC (media access control) of the binding relationship data to obtain a second calculated value;
and judging whether the first calculated value is consistent with the second calculated value, if so, modifying the binding relationship of the card based on the binding relationship data, and if not, ending.
On the basis of the technical scheme, the card writing plug-in obtains the random number generated by the card, and the specific steps comprise:
the card writing plug-in sends a random number generation instruction to the card through the card reader;
the card receives a random number generation instruction sent by the card writing plug-in unit and then generates a random number;
the card sends the generated random number to the card writing plug-in.
On the basis of the technical scheme, the encrypting the random number based on the preset encryption algorithm to obtain the session key specifically comprises the following steps:
the card writing plug-in obtains a preset shared master key;
based on a preset encryption algorithm, the card writing plug-in encrypts the random number and the shared master key to obtain a session key.
On the basis of the above technical solution, after the session key is used to encrypt the calculated value and the binding relationship data to obtain a ciphertext, the method further includes: and the card writing plug-in sends the encrypted ciphertext to the card.
On the basis of the technical scheme, the card decrypts the ciphertext by using the session key based on the preset encryption algorithm to obtain the first calculated value and the binding relationship data, and the specific steps are as follows:
based on a preset encryption algorithm, the card encrypts the random number and the shared master key to obtain a session key;
based on a preset encryption algorithm, the card decrypts the ciphertext by using the obtained session key to obtain a first calculated value and binding relationship data.
On the basis of the technical scheme, an authentication counter is further arranged in the card and used for counting the judgment of the calculated value, and the authentication counter is provided with the current allowable inconsistent times.
On the basis of the above technical solution, the determining whether the first calculation value and the second calculation value are consistent, if so, modifying the binding relationship of the card based on the binding relationship data, and if not, ending, specifically:
and judging whether the first calculation value is consistent with the second calculation value, if so, modifying the binding relationship of the card based on the binding relationship data, if not, ending, and simultaneously reducing the current allowable inconsistent times of the authentication counter in the card by one.
On the basis of the above technical solution, before the card decrypts the ciphertext by using the session key based on the preset encryption algorithm to obtain the first calculated value and the binding relationship data, the method further includes:
and judging whether the current allowable inconsistent times of the authentication counter in the card is zero, if so, ending, otherwise, decrypting the ciphertext by using the session key by the card based on a preset encryption algorithm to obtain a first calculated value and binding relationship data.
On the basis of the technical scheme, the preset encryption algorithm is a symmetric encryption algorithm or an asymmetric encryption algorithm.
The invention provides a device for updating binding relationship, which comprises:
the first encryption module is used for driving the card writing plug-in to obtain a random number generated by the card and encrypting the random number based on a preset encryption algorithm to obtain a session key;
the second encryption module is used for calculating the MAC (media access control) value on the binding relation data by using the session key based on a preset encryption algorithm to obtain a first calculated value, and encrypting the calculated value and the binding relation data by using the session key to obtain a ciphertext;
the decryption module is used for driving the card to decrypt the ciphertext by using the session key to obtain a calculated value and binding relation data based on a preset encryption algorithm, and calculating the MAC (media access control) of the binding relation data to obtain a second calculated value;
and the judging module is used for judging whether the first calculated value is consistent with the second calculated value, if so, modifying the binding relation of the card based on the binding relation data, and if not, ending.
Compared with the prior art, the invention has the advantages that: in the process of authenticating the binding relationship data, the card writing plug-in is based on a preset encryption algorithm, the session key is used for calculating MAC of the binding relationship data to obtain a calculated value, the session key is used for encrypting the calculated value and the binding relationship data to obtain a ciphertext, the card is used for decrypting the ciphertext by the session key to obtain the binding relationship data, the decrypted binding relationship data is subjected to MAC calculation to obtain the calculated value again, then the calculated values obtained twice are compared, and when the comparison is consistent, the binding relationship of the card is modified based on the binding relationship data, so that the updating of the binding relationship of the card is not required to be carried out through a third-party server, the updating process of the binding relationship of the card is simplified, and the maintenance cost of an enterprise to which the card belongs for updating the binding relationship of the card is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a method for updating a binding relationship according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method for updating a binding relationship, in the process of authenticating binding relationship data, a card writing plug-in is based on a preset encryption algorithm, a session key is used for calculating MAC (media access control) on the binding relationship data to obtain a calculated value, the session key is used for encrypting the calculated value and the binding relationship data to obtain a ciphertext, a card is used for decrypting the ciphertext by using the session key to obtain the binding relationship data, the MAC calculation is carried out on the binding relationship data obtained through decryption to obtain a calculated value again, then the calculated values obtained twice are compared, and when the comparison is consistent, the binding relationship of the card is modified based on the binding relationship data, so that the updating of the binding relationship of the card is not required to be carried out through a third-party server, the updating process of the binding relationship of the card is simplified, and the maintenance cost of an enterprise to update the binding relationship of the card is reduced. The embodiment of the invention correspondingly provides a device for updating the binding relationship.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, a method for updating a binding relationship provided in an embodiment of the present invention specifically includes the following steps:
s1: the card writing plug-in obtains a random number generated by the card, and encrypts the random number based on a preset encryption algorithm to obtain a session key. The preset encryption algorithm in the embodiment of the present invention is a symmetric encryption algorithm or an asymmetric encryption algorithm, and for example, may be a DES symmetric encryption algorithm.
S2: based on a preset encryption algorithm, the session key is used for calculating MAC (message check code) of the binding relation data to obtain a first calculated value, and the session key is used for encrypting the calculated value and the binding relation data to obtain a ciphertext. The binding relationship data in the embodiment of the present invention is used for indicating the binding relationship between the card and the terminal device, and is represented in a numerical value form, so as to represent a serial number, a label, and the like of the terminal device to be bound by the card, and may be a fixed value or a range value, or may be a plurality of fixed values or range values, for example, the card a is originally bound with the terminal device a, the binding relationship data is a serial number of the terminal device B, and then the binding relationship of the card is modified based on the binding relationship data, and then the binding relationship of the card a is updated to be bound with the terminal device B.
S3: based on a preset encryption algorithm, the card decrypts the ciphertext by using the session key to obtain a first calculated value and binding relationship data, and calculates the MAC (media access control) of the binding relationship data to obtain a second calculated value;
s4: and judging whether the first calculation value is consistent with the second calculation value, if so, modifying the binding relationship of the card based on the binding relationship data, and if not, ending, and maintaining the binding relationship of the card unchanged.
In the embodiment of the invention, the card writing plug-in obtains the random number generated by the card, and the specific steps comprise:
s101: the card writing plug-in sends a random number generation instruction to the card through the card reader;
s102: the card receives a random number generation instruction sent by the card writing plug-in unit and then generates a random number;
s103: the card sends the generated random number to the card writing plug-in.
In the embodiment of the invention, the random number is encrypted based on a preset encryption algorithm to obtain the session key, and the specific steps comprise:
the card writing plug-in obtains a preset shared master key;
based on a preset encryption algorithm, the card writing plug-in encrypts the random number and the shared master key to obtain a session key.
In this embodiment of the present invention, after encrypting the calculated value and the binding relationship data by using the session key to obtain a ciphertext, the method further includes: and the card writing plug-in sends the encrypted ciphertext to the card.
In the embodiment of the invention, based on a preset encryption algorithm, a card decrypts a ciphertext by using a session key to obtain a first calculated value and binding relationship data, and the specific steps are as follows:
based on a preset encryption algorithm, the card encrypts the random number and the shared master key to obtain a session key;
based on a preset encryption algorithm, the card decrypts the ciphertext by using the obtained session key to obtain a first calculated value and binding relationship data.
In the embodiment of the invention, the card is also provided with an authentication counter, the authentication counter is used for counting the judgment of the calculated value, and the authentication counter is provided with the current allowable inconsistent times. Judging whether the first calculated value is consistent with the second calculated value, if so, modifying the binding relationship of the card based on the binding relationship data, and if not, ending, specifically:
and judging whether the first calculation value is consistent with the second calculation value, if so, modifying the binding relationship of the card based on the binding relationship data, if not, ending, and simultaneously reducing the current allowable inconsistent times of the authentication counter in the card by one.
In the embodiment of the present invention, before the card decrypts the ciphertext by using the session key based on the preset encryption algorithm to obtain the first calculated value and the binding relationship data, the method further includes:
and judging whether the current allowable inconsistent times of the authentication counter in the card is zero, if so, ending, otherwise, decrypting the ciphertext by using the session secret key by the card based on a preset encryption algorithm to obtain a first calculated value and binding relationship data.
The following describes a method for updating a binding relationship according to an embodiment of the present invention with reference to an example.
Assume that the preset encryption algorithm is a DES symmetric algorithm, the binding relationship data is a863224029965800, and the shared master key is MAINKEY.
The random number generated by the card is 11223344, the card writing plug-in obtains the random number generated by the card, then encrypts the random number 11223344 and the shared master key MAINKEY based on a preset encryption algorithm to obtain a session key A, then calculates the MAC of the binding relationship data A863224029965800 by using the session key A based on the preset encryption algorithm to obtain a calculated value B1, then encrypts the calculated value B1 and the binding relationship data A863224029965800 based on the preset encryption algorithm to obtain a ciphertext C, and the card writing plug-in sends the obtained ciphertext C to the card.
After the card receives the ciphertext C, judging whether the current allowable inconsistent times of the authentication counter in the card is zero, if so, reporting an error, and simultaneously ending the binding updating process of the card; if not, based on a preset encryption algorithm, encrypting the random number 11223344 and the shared master key MAINKEY to obtain a session key A, then decrypting the ciphertext C by using the session key A to obtain binding relationship data A863224029965800 and a calculated value B1, then calculating MAC by using the preset encryption algorithm on the binding relationship data A863224029965800 to obtain a calculated value B2, judging whether the calculated value B1 is consistent with the calculated value B2, if so, successfully authenticating, modifying the binding relationship of the card to A863224029965800, and simultaneously restoring the current allowable inconsistent times of the authentication counter to the initial values, if not, failing to authenticate, keeping the binding relationship of the card unchanged, and reducing the current allowable inconsistent times of the authentication counter in the card by one. Finally, the card returns the execution result to the card writing plug-in. The card writing plug-in card and the card share a secret key and an algorithm, the card writing plug-in card encrypts and sends the binding relationship data to the card, and the card decrypts the binding relationship data and updates the binding relationship in the card. And the enterprise updates the binding relationship in the card by using the card reader through installing card writing plug-ins provided by the card supplier.
The invention generates the session key based on the random number generated by the card, ensures the safety and the completeness of the binding relation data through encryption and MAC calculation, and increases the difficulty of the decryption of the key and the algorithm through the setting of the authentication counter.
In the method for updating the binding relationship, in the process of authenticating the binding relationship data, the card writing plug-in is based on a preset encryption algorithm, the session key is used for calculating MAC (media access control) on the binding relationship data to obtain a calculated value, the session key is used for encrypting the calculated value and the binding relationship data to obtain a ciphertext, the card is used for decrypting the ciphertext by using the session key to obtain the binding relationship data, the MAC calculation is carried out on the binding relationship data obtained through decryption to obtain the calculated value again, then the calculated values obtained in the two times are compared, and when the comparison is consistent, the binding relationship of the card is modified based on the binding relationship data, so that the updating of the binding relationship of the card is not required to be carried out through a third-party server, the updating process of the binding relationship of the card is simplified, and the maintenance cost of an enterprise to which the card belongs for updating the binding relationship of the card is reduced.
The device for updating the binding relationship provided by the embodiment of the invention comprises a first encryption module, a second encryption module, a decryption module and a judgment module.
The first encryption module is used for driving the card writing plug-in to obtain a random number generated by the card and encrypting the random number based on a preset encryption algorithm to obtain a session key; the second encryption module is used for calculating the MAC (media access control) value on the binding relation data by using the session key based on a preset encryption algorithm to obtain a first calculated value, and encrypting the calculated value and the binding relation data by using the session key to obtain a ciphertext; the decryption module is used for driving the card to decrypt the ciphertext by using the session key based on a preset encryption algorithm to obtain a calculated value and binding relationship data, and calculating the MAC (media access control) of the binding relationship data to obtain a second calculated value; the judging module is used for judging whether the first calculated value is consistent with the second calculated value, if so, modifying the binding relation of the card based on the binding relation data, and if not, ending.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Claims (4)
1. A method for updating a binding relationship is characterized by comprising the following steps:
the card writing plug-in obtains a random number generated by the card and encrypts the random number based on a preset encryption algorithm to obtain a session key, wherein the card writing plug-in obtains a preset shared master key;
based on a preset encryption algorithm, the card writing plug-in encrypts the random number and the shared master key to obtain a session key;
based on a preset encryption algorithm, calculating MAC (media access control) values by using a session key to the binding relationship data to obtain a first calculated value, and encrypting the calculated values and the binding relationship data by using the session key to obtain a ciphertext, wherein the card writing plug-in sends the ciphertext obtained by encryption to a card;
based on a preset encryption algorithm, the card decrypts the ciphertext by using the session key to obtain a first calculated value and binding relationship data, wherein based on the preset encryption algorithm, the card encrypts the random number and the shared master key to obtain the session key;
based on a preset encryption algorithm, the card decrypts the ciphertext by using the obtained session key to obtain a first calculated value and binding relationship data, and calculates MAC (media access control) of the binding relationship data to obtain a second calculated value;
judging whether the first calculated value and the second calculated value are consistent, if so, modifying the binding relationship of the card based on the binding relationship data, and if not, ending;
the card is also provided with an authentication counter, the authentication counter is used for counting the judgment of the calculated value, and the authentication counter is provided with the current allowable inconsistent times;
judging whether the first calculated value and the second calculated value are consistent, if so, modifying the binding relationship of the card based on the binding relationship data, if not, ending, and simultaneously reducing the current allowable inconsistent times of the authentication counter in the card by one;
and judging whether the current allowable inconsistent times of the authentication counter in the card is zero, if so, ending, otherwise, decrypting the ciphertext by using the session secret key by the card based on a preset encryption algorithm to obtain a first calculated value and binding relationship data.
2. The method for updating the binding relationship according to claim 1, wherein the card writing plug-in obtains the random number generated by the card, and the specific steps include:
the card writing plug-in sends a random number generation instruction to the card through the card reader;
the card receives a random number generation instruction sent by the card writing plug-in unit and then generates a random number;
the card sends the generated random number to the card writing plug-in.
3. A method of updating a binding relationship according to any of claims 1 to 2, characterized by: the preset encryption algorithm is a symmetric encryption algorithm or an asymmetric encryption algorithm.
4. An apparatus for updating a binding relationship, comprising:
the card writing plug-in is used for driving the card writing plug-in to acquire a random number generated by the card and encrypting the random number based on a preset encryption algorithm to obtain a session key, wherein the card writing plug-in acquires a preset shared master key;
based on a preset encryption algorithm, the card writing plug-in encrypts the random number and the shared master key to obtain a session key;
the second encryption module is used for calculating the MAC (media access control) value on the binding relation data by using the session key based on a preset encryption algorithm to obtain a first calculated value, and encrypting the calculated value and the binding relation data by using the session key to obtain a ciphertext, wherein the card writing plug-in sends the ciphertext obtained by encryption to the card;
the decryption module is used for driving the card to decrypt the ciphertext by using the session key based on a preset encryption algorithm to obtain a calculated value and binding relationship data, wherein the card encrypts the random number and the shared master key based on the preset encryption algorithm to obtain the session key; based on a preset encryption algorithm, the card decrypts the ciphertext by using the obtained session key to obtain a first calculated value and binding relationship data, and calculates the MAC (media access control) of the binding relationship data to obtain a second calculated value;
the judging module is used for judging whether the first calculated value and the second calculated value are consistent, if so, modifying the binding relationship of the card based on the binding relationship data, and if not, ending;
the card is also provided with an authentication counter, the authentication counter is used for counting the judgment of the calculated value, and the authentication counter is provided with the current allowable inconsistent times;
judging whether the first calculated value and the second calculated value are consistent, if so, modifying the binding relationship of the card based on the binding relationship data, if not, ending, and simultaneously reducing the current allowable inconsistent times of the authentication counter in the card by one;
and judging whether the current allowable inconsistent times of the authentication counter in the card is zero, if so, ending, otherwise, decrypting the ciphertext by using the session key by the card based on a preset encryption algorithm to obtain a first calculated value and binding relationship data.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2012227899A (en) * | 2011-04-22 | 2012-11-15 | Toshiba Corp | Authentication component, authenticated component and authentication method therefor |
| JP2013069250A (en) * | 2011-09-26 | 2013-04-18 | Toshiba Corp | Storage device and writing device |
| CN107231235B (en) * | 2016-08-02 | 2019-12-31 | 天地融科技股份有限公司 | Electronic receipt generating method, business handling system and intelligent secret key equipment |
| BR112021005174A2 (en) * | 2018-10-02 | 2021-06-15 | Capital One Services, Llc | counter resynchronization system, method of resynchronizing a counter on a contactless card, and contactless card |
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|---|---|---|---|---|
| WO2000028493A1 (en) * | 1998-11-10 | 2000-05-18 | Kent Ridge Digital Labs | A method of encryption and apparatus therefor |
| CN101667258A (en) * | 2009-08-28 | 2010-03-10 | 北京握奇数据系统有限公司 | Data operating method and device for intelligent card |
| CN106301785A (en) * | 2016-08-09 | 2017-01-04 | Tcl集团股份有限公司 | The binding method of a kind of intelligent home device and intelligent terminal and system |
| CN108228211A (en) * | 2017-12-15 | 2018-06-29 | 中国移动通信集团江苏有限公司 | Smart card, the method and system of intelligent card data security update |
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| CN113067701A (en) | 2021-07-02 |
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