Method and apparatus for authenticating static data carriers
AssigneeKoninklijke Philips Electronics N.V.
InventorsJavier Serret Avila, Wim Ton, Philippe Teuwen, Pim Theo Tuyls, Marijke G.C.S. De Soete
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Abstract
Method of authenticating optical discs (10) to a rendering device (50), wherein the disc (10) comprises media content (90), a second database (80) with second authentication data (81) and a transponder (30), the method comprising the steps of: a) Receiving a challenge (C1) from a rendering device (50) by the transponder (30), b) Determining a response (R1) to the challenge (C1) by the transponder (30), and c) Sending the response (R1) to the rendering device (50) by the transponder (30).
Claims20
1-2. (canceled)
Method of authenticating optical discs (10) with media content (90) by means of an enabling device (40) and a first database (20) with first authentication data (21), wherein a disc (10) comprises a transponder (30), the method comprising the steps of:
- a) Reading and decrypting the first authentication data (21) by the enabling device (40);
- b) Requesting a challenge (C1) from the transponder (30) by the enabling device (40);
- c) Sending the challenge (C1) to the enabling device (40) by the transponder (30)
- d) Finding a response (R1) to the challenge (C1) in the first authentication data (21) by the enabling device (40);
- e) Sending the response (R1) to the transponder (30) by the enabling device (40);
- f) Determining a response (R2) to the challenge (C1) by the transponder (30);
- and
- g) Checking by the transponder (30) whether the responses (R1, R2) match up.
Method according to 3, wherein the first authentication data (21) comprise a content key (KCONT), the content key (KCONT) being usable for decrypting the media content (90) and a session key (KSESS), the session key (KSESS) being usable for encrypting the content key (KCONT), the method further comprising the steps of:
- g) Sending an encrypted content key (KENCR) to the transponder (30) by the enabling device (40);
- h) Determining a session key (KSESS) from the challenge (C1) and the transponder key (KRFID) by the transponder (30);
- i) Determining a content key (KCONT) by the transponder (30);
- and
- j) Storing the content key (KCONT) on the transponder (30) by the transponder (30).
15-24. (canceled)
Optical disc (10) comprising media content (90) and a second database (80) with second authentication data (81), wherein the optical disc (10) further comprises a transponder (30), wherein at least a subset of authentication data on the transponder (30) matches cryptographically at least a subset of the second authentication data (81).
Dependencies are inferred from the claim text.