A new authenticated encryption schemes without using Hash and Redundancy functions
Fangwei Li, Xun Sun, Xin Zhang, Li Wan, Shaojun Yan · 2010
A new type of authenticated encryption schemes combined signature with message recovery schemes and symmetric encryption schemes together. It was an authenticated encryption without using Hash functions or Redundancy functions. However, we found the scheme does not have a digital signature of the basic conditions required, and can not resist the forgery attack of the news recipient, At the same time, we proposed a new authenticated encryption schemes, the security of new scheme is based on solving the discrete logarithm problem and the dual-mode problem, and whenever a dispute arises, the authenticated encryption signature will be converted into an ordinary signature, anyone can verify the validity of signatures.