| Efficient Public Key Broadcast Encryption System |
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Moon-Shik Lee |
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Korea Air Force Academy |
| 효율적인 공개키 기반의 디지털 콘텐츠 전송 시스템 |
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이문식 |
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공군사관학교 수학과 |
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| Abstract |
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In this paper, we propose an efficient public key broadcast encryption system which can also extend traitor trace and revoke system. Although the proposed system has limited collusion size, the ciphertext size in the system can be sublinear in the number of total users, the private key size is constant, the computational cost can be sublinear and it can support black-box tracing algorithm, therefore, our system can be an option to applications where reducing the ciphertext size, private key size is a top priority. Furthermore, we can also apply our system to military document broadcast system, because it has such an efficient measurement. |
| Key Words:
Cryptography, Broadcast Encryption System, Traitor Tracing, Traitor Trace and Revoke |
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