Secure communications over insecure channels
Communications of the ACM
Digital Signcryption or How to Achieve Cost(Signature & Encryption)
CRYPTO '97 Proceedings of the 17th Annual International Cryptology Conference on Advances in Cryptology
Unbelievable Security. Matching AES Security Using Public Key Systems
ASIACRYPT '01 Proceedings of the 7th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
Informatics - 10 Years Back. 10 Years Ahead.
NTRU: A Ring-Based Public Key Cryptosystem
ANTS-III Proceedings of the Third International Symposium on Algorithmic Number Theory
Time-lock Puzzles and Timed-release Crypto
Time-lock Puzzles and Timed-release Crypto
Scalable, Server-Passive, User-Anonymous Timed Release Cryptography
ICDCS '05 Proceedings of the 25th IEEE International Conference on Distributed Computing Systems
Using client puzzles to protect TLS
SSYM'01 Proceedings of the 10th conference on USENIX Security Symposium - Volume 10
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Merkle Cryptosystem (MC) is the first cryptosystem which introduces general concept of the public key cryptography. In this paper, we propose Improved Merkle Cryptosystem (IMC), which has significant security advantages over both MC and a variant of MC (VMC). In IMC, cryptographic hash functions and a new puzzle structure are used together in order to increase the security of MC and VMC. The key agreement value, which is send as clear text in VMC, is hidden using cryptographic hash function in IMC. Also, in order to increase security of the key agreement value, auxiliary keys are used. Notice that, in IMC, computational advantages of VMC remain unchanged while its security is increased. Utilizing computational advantages of VMC, IMC has also security and storage advantages over original MC. It is shown that, with these improvements, IMC can provide as high security as some well-known public key cryptosystems while MC and VMC can not provide same security due to performance problems.