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| A Complete Asymmetric Public-Key Traitor Tracing Scheme |
| Wang Qing-long; Yang Bo |
| Computer and Information Technology Institute, Beijing Jiaotong University, Beijing 100044, China |
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Abstract Based on oblivious polynomial evaluation, this paper presents a new asymmetric public-key traitor tracing scheme. Compared with the previous schemes, this proposed scheme can accurately determine a or all traitor(s) from an illegal decoder by full black-box tracing when the number of traitors participating conspiracy is not larger than the defined number; and revoke unlimited traitors by means of the way of updating secret key. Moreover, this proposed scheme greatly decreases the computational cost of tracing a traitor and has a higher transmission efficiency compared with those of available.
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Received: 18 June 2004
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2006, Vol. 28 
