WO2013060674A1

WO2013060674A1 - Parental remote control

Info

Publication number: WO2013060674A1
Application number: PCT/EP2012/070957
Authority: WO
Inventors: Mathieu Phirmis
Original assignee: Viaccess
Priority date: 2011-10-24
Filing date: 2012-10-23
Publication date: 2013-05-02
Also published as: FR2981821B1; FR2981821A1

Abstract

The invention relates to a method by which a remote terminal controls access, by at least one receiving terminal, to digital content provided by an operator of a content distribution network comprising a central access server, access to said content being conditioned by at least one predefined access rule. This method comprises the following steps: - the remote terminal receives information relating to the digital content being used, - the remote terminal defines at least one new access rule for access to the digital content being used, - the new access rule is transmitted to the central access server to control access to the digital content being used, regardless of the moral level criterion associated with the content and the moral level threshold predefined in the receiving terminal.

Description

REMOTE PARENTAL CONTROL

DESCRIPTION

TECHNICAL FIELD The invention lies in the field of access control to a content and relates more specifically to a remote terminal control method of access by at least one receiving terminal to a digital content with which a criterion is associated. of moral level and a moral level threshold predefined in said receiving terminal, and whose access is conditioned by at least one predefined access rule, said content being provided by an operator of a content distribution network comprising a central access server. The invention also relates to a system adapted to implement the method according to the invention, a terminal for receiving the digital content provided by the operator of the distribution network, a remote terminal adapted to control access to the multimedia content by said receiving terminal, and a computer program stored on a recording medium and having instructions for performing, when executed by a computer, the steps of the method according to the invention.

The invention applies in the general case to a content protected by a CAS (for Conditional Access System) or a DRM (for Digital Rights Management) and in particular to customize the functionality of a predefined parental control.

The invention is more particularly in the context of "cloud computing" where parental control solutions inherited from the DVB system are no longer relevant, or at least do not adhere to the inherent philosophy that a system functionality can be controlled remotely from any user terminal.

STATE OF THE PRIOR ART

Parental control consists of a set of means implemented by an access control system (CAS or DRM) to ensure that the content digital multimedia in use (reading, execution, recording, redistribution) is by an audience whose age meets a minimum required.

The known parental control solutions, inherited from the DVB system, consist in defining a moral level criterion characterizing the audience likely to use a content. Generally, the moral level criterion is a legal age below which the use of the content is prohibited. This moral level criterion is inserted into the content by the access control system (CAS, DRM) for later control when using the content; the control being carried out by entering an unlock code (PIN code) known only by the parental authority and which will be required as soon as the moral level inserted in the content reaches or exceeds a threshold, said threshold of moral level, predefined in the receiving terminal. Access rules of this type are configured locally in the receiving terminal permanently and fixed. In addition, in certain variants of this access rule, the unlock code is no longer requested once the unlocking has been made and this, even if meanwhile the moral level has fallen below the threshold exceeded.

Access rules refer to additional conditions defined according to moral criteria and independent of the commercial access criteria that are attached to the content and predefined in the access condition associated with that content ".

A disadvantage of these solutions comes from the fact that this criterion of moral level is only rarely, if ever, defined for content other than content reserved for adults, for which it is mandatory. For example, age limits 10, 12 and 16 are rarely used as a moral level criterion although the possibility is given by access control systems. In addition, the user exercising parental authority can set the PIN but generally can not change the predefined legal age. In addition, the application of the control requires the physical presence of the person exercising parental authority except to disclose the PIN code defined for this purpose.

The document WO200201864 A1 describes a method of delegating, at a remote terminal, control of the access by a local terminal to digital multimedia content protected by parental control. The solution described in this document not allow the remote terminal to intervene, at the initiative of the parent, and instantaneously, to exercise access control to content in use.

The object of the invention is to overcome the disadvantages of the prior art described above.

STATEMENT OF THE INVENTION

The invention consists in a remote terminal control method of access by at least one reception terminal to a digital content with which a moral level criterion is associated and whose access is conditioned by at least one rule of access. predefined access, said content being provided by an operator of a content distribution network including a central access server.

The process according to the invention comprises the following steps:

receiving by the remote terminal information relating to the digital content in use,

define by the remote terminal at least one new access rule to the digital content in use,

transmitting the new access rule to the central access server so as to control the access to the digital content in use regardless of the moral level criterion associated with the content and the predefined moral level threshold in the reception terminal .

According to the invention, upon reception of the new access rule, the central access server prohibits or authorizes access to the content by the reception terminal according to the new access rule.

In a first variant, said new access rule consists of an unconditional access ban.

In a second variant, said new access rule consists of an unconditional authorization of access.

In a third variant, said new access rule consists of entering a valid code previously associated with the new rule. The method according to the invention is implemented in a control system by a terminal remote access by at least one receiving terminal to a digital content which is associated with a moral level criterion and whose access is conditioned by at least a predefined access rule, said content being provided by an operator of a content distribution network including a central access server.

The system according to the invention comprises a remote terminal comprising a module for analyzing the information relating to the digital content in use able to define at least one new access rule to the digital content and to transmit said new access rule. to the central access server to control access to the digital content in use, regardless of the moral level criterion associated with the content and the predefined moral level threshold in the receiving terminal.

The digital content receiving terminal includes a local module adapted to firstly apply at least one new access rule, transmitted by a remote terminal to a central access server, independently of the moral level criterion associated with the content and the threshold of predefined moral level in the receiving terminal.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features and advantages of the invention will emerge from the description which follows, taken by way of non-limiting example, with reference to the appended figures in which:

FIG. 1 schematically illustrates a general architecture of a control system, remotely, of access to a digital content according to the invention,

FIG. 2 diagrammatically represents a diagram illustrating sequences of a particular example of application of the method according to the invention. DETAILED PRESENTATION OF PARTICULAR EMBODIMENTS

The invention will be described with reference to FIGS. 1 and 2 in a particular application of the method according to the invention in which a parent or a person exercising parental authority, and having a multimedia digital services contract with an operator, controls remote access to content received by one or more terminals 2 connected to the network operator. This remote control can be performed by means of a remote terminal 4 such as for example a mobile phone, a laptop, a digital tablet or any device provided with communication means. The network of the operator comprises a central access server 6 arranged at the head of the network and communicating with the terminals of the home.

The user's home includes a set of terminals declared and configured with the operator, and eligible for the use of digital multimedia content offered as part of the service contract. Remote control of content applies to the use of content broadcast during reception, or content previously received and recorded, or obtained on a digital medium.

For the sake of clarity, a single receiving terminal 2 is shown in FIG. 1 schematically illustrating the general architecture of a system adapted to implement the method according to the invention. This system comprises an access node 8 to the operator's content distribution network, a management module 10 adapted to configure the central access server 6 with the terminals constituting the home of a subscriber and to manage the subscriptions users.

The network of the operator may be a broadcast broadcast network such as for example DVB-S2, DVB-H, or a broadband or cellular broadcast network such as for example an adsl2 + network or a 3G network. In the case of broadcast via a purely broadcast network, the receiving terminal further comprises a return point via a unicast link (Interface 12).

The central access server 6 is a central element of the access control system (CAS or DRM), and its functions are the identification and authentication of the home and the terminals of this home, the delivery of rights to the terminals of the home, and the end-to-end protection of the multimedia digital contents of the operator.

The reception terminal 2 comprises a local module 12 adapted to check the access rights issued to the reception terminals by the central access server 6, to apply access rules relative to a parental control predefined locally in the reception terminal. , and instantaneously apply, as a priority to said predefined parental control rules, new rules relating to a parental control defined remotely and on the fly by the remote terminal 4. The remote terminal 4 comprises a remote control module 14 of access to the digital content in use able to obtain information relating to this content, to define at least one new rule for access to the digital content, and to transmit to the central access server 6 the new rule of access to control access to digital content regardless of the moral level criterion associated with the content and the level threshold predefined message in the receiving terminal.

Configuration of the central access server

The configuration of the central access server is performed through an interface 11, accessible only by the operator. The interface 11 can typically be of the web type (http) and can be implemented by means of SOAP requests (XML over http) for example.

Fireplace configuration

The configuration of the user's home consists of identifying this household at the receiving terminal 2 and declaring all the household members of the household. This configuration is performed as follows:

- Household identification using a unique HID identifier; this unique identifier HID is assigned to the home by the central access server 6, following the input: User ID identifier userlD as URI (eg Jacques, Dupont@Operator.com);

- a password, Password, associated with the unique identifier of the subscriber;

- Description of the terminals of the home by the following information: TERM I NALJD representing a physical identifier of the receiving terminal 2 which can for example be defined from the serial number of said terminal; a unique identifier Agentl D is allocated by the central access server 6 to the local module 12 of the receiving terminal in question. This unique identifier Agentl D is associated with the identifier TERM INALJD of the receiving terminal 2. The association (TERM INALJD, Agentl D) is part of the usual framework of personalization (in the factory, on-line) of a receiving terminal 2 within the considered CAS or DRM system.

The unique identifier (AgentID) of the receiving terminal can correspond to the address UA (Unique Address) of its associated security processor characteristic of the traditional CAS and makes it possible to address unequivocally the local module 12 considered. An example of formats of the request and response messages of the interface 11 is described below:

<CONFIG_REQ>

<Login>

</ login>

</ CONFIG_REQ>

<CONFIG_REP>

</ CONFIG_REP> Local Parental Control Services

The functional services for configuring the local access control performed by the local module 12 are described by an interface 12 which can also be of web type (http). This interface 12 can also use the management messages of EMM type (Entitlement Management Message) specific to the traditional CAS. It is accessible to the central access server 6.

The interface 12 allows the activation of a service called Audit in the following description to allow the central server 6 to obtain information about the content in use on a receiving terminal 2 of the home. This interface 12 also makes it possible to activate, remotely, a priority access rule.

Audit

Two types of Audit are possible:

- Audit of a particular receiving terminal 2, in this case the Audit command is sent to the local module 12 of said receiving terminal 2 via its unique identifier (Agentld).

Hearing audit, in this case the Audit command is sent to all local modules 12 of the household via the HID home identifier.

The audited terminals provide the following information via a unicast link:

- AgentJD:

channeljd: identifier of the channel currently being received, rating: the moral level present in the content in use through said channel,

type: the type of the program (Live, VoD or PVR),

The start time of use (optional).

An audited terminal then waits for priority access rules from the central access server 6, while continuing, by default, to apply its own local access rules. An example of the message formats of the interface 12 for the Audit is described below:

<AUDIT_REQ>

</ Reference>

</ AUDIT_REQ>

<AUDIT_REP>

</ Reference>

</ AUDIT_REP>

Agentld: represents the address of the local module 12 of the reception terminal 2 attached to the home in question;

Rating: represents the moral level of the current content;

Channeljd: represents the number of the channel.

Activating a priority access rule

The "Activating a priority access rule" service enables the central access server 6 to activate a new access rule in a local module 12.

This access rule, once the integrity and authenticity verified by the local module 12, is then executed in place of that corresponding to the previously applied parental control.

The following rules are possible:

RI: enable remote parental control,

Optional parameter: channeljd

Action: Enable or Stop descrambling on a particular channel (channeljd) or on all channels (default); R2: activation of the remote parental control under the condition of entering a secret code,

Required parameter: secret_code

Optional parameter: channeljd

- Action: stop descrambling on a particular channel

(channeljd) or on all channels (default) and password entry request, if the password entered matches secret_code, then re-enable descrambling on a particular channel (channeljd) or on all channels (default ); - R3: disabling remote parental control;

Optional parameter: channeljd

Action: The local parental control rule is reactivated for the specified channel (channeljd) or for all channels (default).

An example of the message formats of the interface 12 for the activation of a priority access rule is described below:

<PARENTAL_CONTROL_DOWNLOAD_REQ>

<terminal AgentlD = "Agentld-l" action = "VIEWING_FORBIDDEN"

<terminal AgentlD = "Agentld-l" action = "VIEWING_ALLOWED"

<terminal AgentlD = "Agentld-l" action = "SECRET_CODE_REQUIRED" secret_code = "2476"

</ Reference>

</ PARENTAL_CONTROL_DOWNLOAD_REQ>

Agentld: represents the identifier of the local module 12 of the reception terminal 2 attached to the home in question; Action: Represents a new access rule to apply:

- VIEWING_FORBIDDEN: Stop descrambling on a particular channel (channeljd) or on all channels (default).

VIEWING_ALLOWED: Allow descrambling on a particular channel (channeljd) or on all channels (default).

- SECRET_CODE_REQUIRED: Preliminary request to enter a password on the receiving terminal, if the password entered corresponds to "secret_code", then authorization of descrambling on the particular channel (channeljd) or on all the channels (by default).

- LOCALj ONTROL: End of remote control. The local module 12 of the receiving terminal again applies its own predefined access rule.

It should be noted that the new access rule applied by the local module 12 of the reception terminal 2 is persistent even if the reception terminal is restarted.

Remote Parental Control Service

The set of services making it possible to exercise parental control from a remote terminal 4 is described by an interface 13 which may be of the SOAP (xml over http) type.

This interface 13 makes it possible to carry out a service called CONNECT in the following description which allows the remote control module 14 of the remote terminal 4 to open a control session with the central access server 6, a service called SPY in the following the description that enables said remote control module 14 to send to the central access server 6 a request for collection of information relating to the content in use on a reception terminal 2 of the home, a service of activation of an access rule which enables the remote control module 14 to remotely activate, instantaneously, a new priority access rule as to the use of a given content on a reception terminal 2 member fireplace. SERVICE CONNECT

For the Connect service, the remote control module 14 is authenticated by the central access server 6 and obtains the configuration of the reception terminals of the home.

The format of the query is as follows:

<CONNECT_REQ>

<Login>

</ login>

</ CONNECT_REQ>

userlD: Identifier of the outbreak in URI format.

Password: password associated with the home.

The central access server 6 authenticates the remote control module 14 and sends back to it the information relating to the focus in question via the following response:

<CONNECT_REP>

</ CONNECT_REP>

HID: represents the logical identifier of the home within the central access server.

TERMINALJD: represents the physical identifier of the receiving terminal attached to the particular focus.

Ctrl_session: indicates if a remote control session is in progress; Action: Represents a last access rule sent if a remote control session is in progress;

ChanneMd: represents the number of the channel concerned by the last access rule.

It should be noted that after a period of inactivity the session (CONNECT_ REO) is automatically closed, and it is always possible to open another session from another terminal. In addition, if several sessions are simultaneously active, the orders will be taken into account in the order of arrival.

SPY SERVICE

An example of a request for collecting information relating to the content in use on a reception terminal 2 of the home is described below: <SPY_REQ>

<terminal TERMINAL_ID = "terminal_id-l7

<terminal TERMINAL_ID = "terminal_id-n" /

</ Reference>

</ SPY_REQ>

HID: represents the Home Identifier.

TERMINAL_ID: represents the physical identifier of the receiving terminal 2 to spy on.

The <terminal> parameter can be omitted; in this case, the command applies to all active terminals of the household.

The TERMINALJD Terminal Audit command is then activated by the SPY_REQ request.

The response returned by the central access server 6, based on the response it itself receives from the terminal TERMINALJD, contains the following information:

<SPY_REP>

<terminalTERMINAL_ID = "terminal_id-l" channel_id = "channel_number" rating = "maturity_level" resume = "program description" /> <terminal TERMINAL_ID = "terminal_id-n" channel_id = "channel_number" rating = "maturity_level" resume = "program description "/> </ reference>

</ SPY_REP>

Channel_id: represents the channel number for the program in use.

It should be noted that in local PVR mode this information may not be accessible and then take a particular value, eg: PVR channel.

Rating: represents the moral level of the current program. Summary: represents an optional parameter, describing the current program if an ESG is available at the central access server 6.

The parental control can be exercised by means of the command "Activation of a priority access rule" described below according to the moral level thus indicated.

Activating a priority access rule

The "Activating a priority access rule" service enables the remote control module 14 to instantly activate a new priority access rule with regard to the use of a given content on a reception terminal. fireplace.

The format of the query is as follows:

<PARENTAL_CONTROL_UPLOAD_REQ>

<terminalID terminal = "TID-2" action = "VIEWING_ALLOWED"

CHANNEL_ID = "CHANNEL_NUMBER" />

<TerminalID terminal = "TID-3"

action = "SECRET_CODE_REQUIRED"

secret_code = "2541"

CHANNEL_ID = "CHANNEL_NUMBER" />

</ Reference>

</ PARENTAL_CONTROL_UPLOAD_REQ>

TeminalJD: represents the Identifier of the terminal to be controlled.

Action: the access rule to activate; the possible values are:

VIEWING_ALLOWED: Allow descrambling on a list of particular channels (channeljd) or on all channels (default). - SECRET_CODE_REQUI RED: Prior request to enter a password on the receiving terminal, if the password entered corresponds to "secret_code", then enable descrambling on the particular channel (channeljd) or on all channels (default ).

- LOCAL_CONTROL: End of the remote control. Local module 12 again applies its own predefined access rule.

DISCONNECT SERVICE

The DISCONNECT service allows the module 14 of the remote terminal 4 to explicitly close a control session with the central access server 6.

The format of the query is as follows:

</ Reference>

</ DISCON NECT_REQ>

It should be noted that at the end of this command the module 14 of the remote terminal 4 is no longer authenticated with the central access server 6. The session is automatically closed by the central access server 6 after a inactivity period too long.

The above services may be rendered over an unencrypted communication network. However, it may be advisable to secure the various interfaces 12 and 13 described above via the prior establishment of a secure tunnel between the local module 12 of the reception terminal 2 (respectively the analysis module 14 of the remote terminal 4 ) and the central access server 6 by one of the following methods (non-exhaustive list):

Authentication and encryption via SSL (Secure Socket Layer) protocol: asymmetric encryption algorithm: ex RSA

Symmetric Encryption Algorithm: ex 3DES

Execution example: HTTP-S protocol Authentication and proprietary encryption algorithms.

The remote access control of content in use by the reception terminal 2 is done according to the steps which will be described in detail below. A- Acquisition of information on the content in use

The remote control module 14 of the remote terminal 4 connects to the central access server 6, and is identified by the latter (eg login, password). The central access server 6 provides information relating to the terminals composing the user's home to the remote control module 14. The latter then requests the central access server 6 to provide the information on the current content. use on a receiving terminal 2 of the fireplace. If the central access server 6 is not aware of the content in use, it sends a feedback order content information to the local module 12 of the receiving terminal 2. The latter refers to the central access server 6 the information on the digital content in use on the receiving terminal 2. The central access server 6 transmits to the remote control module 14 data thus collected. These can be made up of synthetic information allowing to exercise the parental control (chain, nature of the program, moral level, ...).

In another variant, the information relating to the content in use comprises the content itself, which is also transmitted to the remote terminal 4 by the central access server 6.

B- Parental control at a distance

Based on the analysis of the digital content and the decision by the user to exercise parental control, the remote control module 14 sends to the central access server 6 a new access rule that will be activated as a priority and instantaneously by the local module 12 of the receiving terminal 2. This new access rule may consist in stopping immediately or in a delayed manner the descrambling of the content in use or all the received contents, or allow descrambling of content in use. The local module 12 sends an acknowledgment message to the central access server 6, and to the remote control module 14 of the remote terminal 4. The remote control module 14 sends an end of control command to the central access server 6 The latter transmits the end of control command to the local module 12 of the reception terminal 2, which again applies its local rule for access to the content and does not put back the information on this content.

Note that the remote control take and end can be done in different sessions.

FIG. 2 illustrates the messages exchanged between the central access server 6, the management module 10 arranged at the head of the network, the local module 12 of the reception terminal 2, and the remote control module 14 of the remote terminal 4, for remotely control a descrambling stop as part of a remote parental control.

Phase 20 consists of configuring the reception terminals of the user's home. For this purpose, in step 22, the management module 10 sends the central access server 6 a request CONFIG_REQ. (login, psswd, TERMINALJD [l..n] allowing to initialize a login and password for the household, as well as the creation of a unique identifier (Agentld) for each terminal of the household.

In step 24, the central access server 6 transmits a response CONFIG_REP (HID, Agent ID [l..n]) comprising a unique identifier HID of the home and an identifier for each local module 12 of each reception terminal 2 fireplace.

The next phase is a negotiation between the central access server 6 and the analysis module 14 of the remote terminal 4 for the opening of a secure tunnel between these two elements.

For this purpose, in step 28, the remote control module 14 transmits to the central access server 6 a CONNECT_REQ request (login, passwd) in order to connect via a login identifier and a passwd password. ". In step 30, the central access server 6 responds to the analysis module 14 by a CONNECT_REP message (login, passwd) comprising a unique identifier HID home and an identifier TERMINAL_ID [l..n] for each terminal of the home.

Phase 32 consists of "spying" the reception terminal 2 to know the nature of the content received (possibly in use) on this terminal 2.

For this, in step 34, the remote control module 14 sends to the central access server 6 a request SPY_REQ (HID, TERMINALJD, ChannelJD).

On receiving the request SPY_REQ (HID, TERMINALJD, Channeljd), the central access server 6 sends to the local module 12 of each reception terminal 2, in step 36, a request AUDIT_REQ. (HID, AgentJD) for ask for information about the content.

In step 38, each local module 12 responds to the central access server 6 by an AUDIT_REP message (HID, AgentJD, Channeljd) containing information on the content.

In step 40, the central access server 6 transmits the received information to the remote control module 14.

In the exemplary embodiment described, the remote control module 14 activates a new priority access rule to stop the descrambling of the content received by the terminal 2.

For this purpose, in step 52, the remote control module 14 transmits to the central access server 6 the message

(PARENTAL_CONTROL_UPLOAD_REQ (HID, TERMINAL, CHANNELJD, VIEWING_FORBIDD EN) to interrupt descrambling of the content at the receiving terminal 2.

In the case of the activation of a new priority access rule submitting the descrambling of the content received by the terminal 2 to the input of a secret code, the message (PARENTAL_CONTROL_UPLOAD_REQ (HID,

TERMINAL_ID, CHANNEL_ID, SECRET_CODE_REQ.UIRED,

Code_Secret) could be passed as an alternative for this step 52. In step 54, the central access server 6 transmits to the local module 12 of each reception terminal 2 a request:

(PARENTAL_CONTROL_UPLOAD_REQ (HID, Agent_ID, CHANNEL_IDNIEWING_FORBIDDEN) which interrupts the descrambling of the content at the receiving terminal 2.

In step 56, the local module 12 transmits an acknowledgment to the central access server 6.

In step 60, the central access server 6 transmits an acknowledgment to the analysis module 14.

Claims

A method for remote terminal control (4) of access by at least one receiving terminal (2) to a digital content having a moral level criterion and a predefined moral level threshold in the receiving terminal associated therewith , and whose access is conditioned by at least one predefined access rule, said content being provided by an operator of a content distribution network comprising a central access server (6), said remote terminal (4) being provided with a remote control module (14) for accessing the digital content in use, and said receiving terminal being provided with a local parental control module (12), characterized in that it comprises the following steps:

the remote control module (14) sends to the central access server (6) transparently for the reception terminal, a request for obtaining information relating to the content in use,

on receiving said request, the central access server sends the local module of the reception terminal a request for information on the content in use,

Said parental control local module (12) transmits information on the content to the central access server (6),

Upon receipt of said information, the remote terminal (4) defines at least one new access rule to the digital content in use, transmits the new access rule to the central access server (6) so as to control access to the digital content in use regardless of the moral level criterion associated with the content and the predefined moral level threshold in the receiving terminal.

2. Method according to claim 1, in which, on receipt of the new access rule, the central access server (6) prohibits or authorizes access to the content by the reception terminal (2), respectively, by function of the new access rule.

3. The method of claim 1 wherein the remote terminal (4) receives the digital content in use by the receiving terminal (2) and information relating to this content.

4. The method of claim 1 wherein said new access rule consists of an unconditional access ban.

The method of claim 1 wherein said new access rule consists of an unconditional access authorization.

6. The method of claim 1 wherein said new access rule is to enter a valid code previously associated with the new rule.

7. Control system by a remote terminal (4) of the access by at least one receiving terminal (2) to a digital content which is associated with a moral level criterion and whose access is conditioned by at least one rule predefined access access, said content being provided by an operator of a content distribution network comprising a central access server (6), characterized in that it comprises a remote terminal (4) comprising a module analysis (14) of information relating to the digital content in use able to define, in a transparent manner for the receiving terminal (2), at least one new access rule to the digital content and to transmit said new rule of access to the central access server (6) to control access to the digital content in use regardless of the moral level criterion associated with the content and the predefined moral level threshold in the receiving terminal .

8. Remote terminal (4) adapted to control access by at least one receiving terminal (2) to a digital content which is associated with a moral level criterion and whose access is conditioned by at least one access rule predefined, said content being provided by an operator of a content distribution network comprising a central access server (6), remote terminal (4) characterized in that it comprises an analysis module (14) of information relating to the digital content in use able to define at least one new an access rule for the digital content and transmitting to the central access server (6) a new access rule for controlling access to the digital content in use, on the basis of this new access rule, regardless of the moral level criterion associated with the content and the predefined moral level threshold in the receiving terminal.

9. Terminal for receiving (2) a digital content with a moral level criterion associated with it and whose access is conditioned by at least one predefined access rule, said content being provided by an operator of a network of content distribution comprising a central access server (6), receiving terminal (2) characterized in that it comprises a local module (12) adapted to apply primarily at least one new access rule, transmitted by a terminal remote (4) to a central access server (6), regardless of the moral level criterion associated with the content and the predefined moral level threshold in the receiving terminal.

A computer program stored on a recording medium and having instructions for performing, when executed by a computer, the steps of the method according to claim 1.