| A Public Key Traitor Tracing Scheme with Key-update Method |
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Moon-Shik Lee |
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Korea Air Force Academy |
| 개인키 업데이트가 가능한 공개키 기반 공모자 추적 암호 알고리즘 |
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이문식 |
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공군사관학교 수학과 |
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| Abstract |
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Traitor Tracing schemes are broadcast encryption systems where at least one of the traitors who were implicated in the construction of a pirate decoder can be traced. This traceability is required in various contents delivery system like satellite broadcast, DMB, pay-TV, DVD and so on. In this paper, we propose a public key traitor tracing scheme with key-update method. If the system manager can update a secret key which is stored in an authorized decode, it makes a pirate decoder useless by updating a secret key A pirate decoder which cannot update a secret key does not decrypt contents in next session or during tracing a traitor, this scheme has merits which will make a pirate decoder useless, therefore this scheme raises the security to a higher level. |
| Key Words:
Cryptography, Broadcast Encryption System, Traitor Tracing, Traitor Trace and Revoke, Key-update |
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