Protected return path from digital rights management dongle
AssigneeKoninklijke Philips Electronics N.V.
InventorMarc Vauclair
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Abstract
A method, apparatus, and system for providing secure communication between a tamper resistant device (404) and a sink device (406) is disclosed. Encrypted content is received from a source device (402) at the tamper resistant device (404), wherein the content has been encrypted using a first key. The content is decrypted using the decrypted first key. A second key is received at the tamper resistant device (404) from the sink device (406), wherein the second key is encrypted using the public key of the tamper resistant device (404). The second key is decrypted using the private key of the tamper resistant device (404). The content is re-encrypted using the second key. The re-encrypted content is transmitted to the sink device (406).
Claims18
A method for providing secure communication between a tamper resistant device and a sink device, comprising the steps of:
- receiving encrypted content from a source device at the tamper resistant device, wherein said content has been encrypted using a first key;
- decrypting the content using the first key;
- encrypting a second key using the public key of the tamper resistant device;
- receiving the encrypted second key at the tamper resistant device from the sink device;
- decrypting the encrypted second key using the private key of the tamper resistant device;
- re-encrypting the decrypted content using said decrypted second key;
- and
- transmitting said re-encrypted content to said sink device.
An apparatus for providing secure communication between a tamper resistant device and a sink device, comprising:
- means for receiving encrypted content from a source device at the tamper resistant device, wherein said data has been encrypted using a first key;
- means for decrypting the content using the decrypted first key;
- means for receiving a second key at the tamper resistant device from the sink device, wherein the second key is encrypted using the public key of the tamper resistant device;
- means for decrypting the encrypted second key using the private key of the tamper resistant device;
- means for re-encrypting the content using said decrypted second key;
- and
- means for transmitting said re-encrypted content to said sink device.
A system for providing secure communication between a tamper resistant device and a sink device, comprising:
- a source device for transmitting encrypted content,
- wherein said content has been encrypted using a first key;
- the tamper resistant device receiving encrypted content from the source device,
- the tamper resistant device decrypting the content using the first key;
- the tamper resistant device further receiving an encrypted second key from the sink device, wherein the encrypted second key is encrypted at the sink device using the public key of the tamper resistant device;
- the tamper resistant device decrypting the encrypted second key using the private key of the tamper resistant device;
- the tamper resistant device re-encrypting the content using said decrypted-second key;
- and
- the tamper resistant device transmitting said re-encrypted content to said sink device.
Dependencies are inferred from the claim text.