An Efficient Public Key Traitor Tracing Scheme
An Efficient Public Key Traitor Tracing Scheme
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DOI:
10.1007/3-540-48405-1_22
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发表时间:
1999-08
期刊:
影响因子:
--
通讯作者:
D. Boneh;M. Franklin
中科院分区:
文献类型:
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作者:
D. Boneh;M. Franklin
We construct a public key encryption scheme in which there is one public encryption key, butmanyprivate decryption keys. If some digital content (e.g., a music clip) is encrypted using the public key and distributed through a broadcast channel, then each legitimate user can decrypt using its own private key. Furthermore, if a coalition of users collude to create a new decryption key then there is an efficient algorithm to trace the new key to its creators. Hence, our system provides a simple and efficient solution to the “traitor tracing problem”. Our tracing algorithm is deterministic, and catchesallactive traitors whileneveraccusing innocent users, although it is only partially “black box”. A minor modification to the scheme enables it to resist an adaptive chosen ciphertext attack. Our techniques apply error correcting codes to the discrete log representation problem.