This paper shows several security weaknesses of a threshold authenticated encryption scheme. A new threshold authenticated encryption scheme using labor-division signature is proposed without redundancy added to messa...This paper shows several security weaknesses of a threshold authenticated encryption scheme. A new threshold authenticated encryption scheme using labor-division signature is proposed without redundancy added to message blocks. On the assumptions of EDDH problems, the proposed scheme is secure against chosen-ciphertext attacks and existentially unforgeable against the chosen- message attacks in the random oracle model.展开更多
基金This research is supported by the Opening Foundation of Key Lab of Network Security and Cryptology, School of Mathematics and Computer Science, Fujian Normal University under Grant No. 09A003, and the National Natural Science Foundation of China under Grant No. 10961013.
文摘This paper shows several security weaknesses of a threshold authenticated encryption scheme. A new threshold authenticated encryption scheme using labor-division signature is proposed without redundancy added to message blocks. On the assumptions of EDDH problems, the proposed scheme is secure against chosen-ciphertext attacks and existentially unforgeable against the chosen- message attacks in the random oracle model.
