CRYPTO '93 Proceedings of the 13th annual international cryptology conference on Advances in cryptology
Generalized Beimal-Chor schemes for broadcast encryption and interactive key distribution
Theoretical Computer Science
Concrete Math
Coding Constructions for Blacklisting Problems without Computational Assumptions
CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
Long-Lived Broadcast Encryption
CRYPTO '00 Proceedings of the 20th Annual International Cryptology Conference on Advances in Cryptology
A Quick Group Key Distribution Scheme with "Entity Revocation"
ASIACRYPT '99 Proceedings of the International Conference on the Theory and Applications of Cryptology and Information Security: Advances in Cryptology
Efficient Trace and Revoke Schemes
FC '00 Proceedings of the 4th International Conference on Financial Cryptography
Efficient Methods for Integrating Traceability and Broadcast Encryption
CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
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Solutions based on error-correcting codes for the blacklisting problem of a broadcast distribution system have been proposed by Kumar, Rajagopalan and Sahai. We have optimized their schemes by choosing the parameters properly. In this paper, we propose the further improvement for their schemes. On the transmission, the improved schemes with the parameters chosen for the optimized original schemes are more efficient than the optimized original schemes. The average amount of transmission is 70 percents of that for the optimized original scheme in one of the typical cases, while the amount of the storage is the same.