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AssigneeCanon Europa N.V.
InventorsPascal Lagrange, Jean-Paul Accarie
Estimating the term…
In a method for the restriction of access from a sink device to a content stored in a storage device, a content protection protocol comprises an authentication phase and an encryption key exchange phase is implemented between the storage device and the sink device. The method comprises a prior step for the association of at least one predetermined password with said content and/or said storage device; and the following steps of: a) obtaining at least one piece of access information during the authentication phase; b) obtaining a processing function dependent on said at least one piece of access information (UCPK) and said at least one predetermined password (CPK); c) applying the processing function thus obtained during the authentication phase of the protection protocol, the application of the processing function causing the authentication phase to fail when said at least one piece of access information does not meet a predetermined condition.
A method for the restriction of access from a sink device to a content stored in a storage device, a content protection protocol comprising an authentication phase and an encryption key exchange phase being implemented between the storage device and the sink device, wherein the method comprises a prior step for the association of at least one predetermined password with at least one of said content and said storage device;
A sink device enabling access to a content stored in a storage device, said sink device and said storage device comprising means to implement a content protection protocol, comprising an authentication phase and an encryption key exchange phase, said sink device comprising:
A device according to claim 12, wherein said means for the application of the processing function are activated during the exchange of a message between the sink device and the storage device, the message being tampered with if at least one piece of access information does not meet a predetermined access condition.
Dependencies are inferred from the claim text.