摘要:
The invention relates to a multimedia contents processing device, able to receive encrypted multimedia contents, protected by a contents protection system, and to provide said multimedia contents in decrypted form to a user device, comprising means for implementing access control authorizing the provision of said decrypted multimedia contents to said user device, means for executing security services having a first associated level of security and means for executing services having an associated level of security lower than said first level of security. The device according to the invention comprises a hypervisor (30) able to control the execution of at least three groups (G1, G2, G3) of virtual machines, said groups of virtual machines being executed in a strictly separate manner, the first two groups being dedicated to the execution of services of a lower level of security than the first level of security and the third group (G3) of virtual machines able to implement security services of first level of security and to ensure the role of trusted third parties for services of said first and second groups of virtual machines.
摘要:
This method of smoothing the workload of a transaction server executing processes in response to requests transmitted by terminals, this method comprising: - for each terminal, the logging (100) of the instants of toggling between an active state and an inactive state, - the construction (100) for each terminal, on the basis of the toggling instants logged, of an individual usage profile associating with each possible future date a state probability corresponding to the probability that this terminal will be in the active state on this date, - the selection of a rendezvous date associated in a workload plan of the server with a provisional workload which is less than a predetermined first threshold, at the same time, associated in the individual usage profile with a state probability corresponding to a probability that this terminal will be in the active state greater than a second predetermined threshold.
摘要:
The invention relates to a method of protecting a recorded multimedia content in which: d) an authorization server, common to a set of readers, receives (226) an identifier of a channel on which the multimedia content has been broadcast, e) in response to a request to read the recorded multimedia content, the authorization server determines (236) whether the reader is authorized or not to descramble the multimedia content recorded on this channel as a function of access authorizations, associated with the reader, and of the channel identifier received, f) if the reader is not authorized, the reading, by this reader, of the recorded multimedia content is prevented, g) only if the reader is authorized, cryptograms CW KHI , are transmitted (242) to the reader, and h) the reader downloads (248) the scrambled multimedia content recorded by the recorder, decrypts (248) the cryptograms CW KHI and then descrambles (248) the downloaded multimedia content.
摘要:
The invention relates to a method of receiving a multimedia content scrambled with the aid of control words comprising: - the reception (101 a) by a security processor of ECM messages containing at least one cryptogram CW* of a control word CW, - the decryption (110) of this cryptogram CW*, and - the descrambling (110) of a scrambled multimedia content on the basis of the decrypted control word CW, - at least one implementation (114) of a captcha, from a reception terminal, whose correct response is contained in a memory of the processor and varies from one implementation to the other, - the processor acquires (116) at least one response to this captcha and compares (118) this response with the correct response contained in its memory, and - the processor limits (122) the descrambling of the cryptograms CW* if no response to this captcha corresponds to the correct response.