The LSD Broadcast Encryption Scheme
CRYPTO '02 Proceedings of the 22nd Annual International Cryptology Conference on Advances in Cryptology
A Generalized Birthday Problem
CRYPTO '02 Proceedings of the 22nd Annual International Cryptology Conference on Advances in Cryptology
Efficient State Updates for Key Management
DRM '01 Revised Papers from the ACM CCS-8 Workshop on Security and Privacy in Digital Rights Management
Cryptanalysis of alleged A5 stream cipher
EUROCRYPT'97 Proceedings of the 16th annual international conference on Theory and application of cryptographic techniques
One-Way chain based broadcast encryption schemes
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
Security weaknesses of certain broadcast encryption schemes
DRMTICS'05 Proceedings of the First international conference on Digital Rights Management: technologies, Issues, Challenges and Systems
On advanced cryptographic techniques for information security of smart grid AMI
Proceedings of the Seventh Annual Workshop on Cyber Security and Information Intelligence Research
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This letter yields a security evaluation of certain broadcast encryption (BE) schemes regarding the generic vulnerability of the textbook BE schemes. The considered vulnerability can be effectively explored assuming known plaintext attacks which in a realistic scenario, corresponding to a legitimate user being the attacker, appears as a ciphertext only attack. Employing the birthday paradox, a dedicated time-data trade-off based algorithm for cryptanalysis is proposed. The developed algorithm is applied to cryptanalysis of particular recently reported class of BE schemes, implying additional insights regarding motivations for their security improvements.