1. State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications,Beijing 100876,China;2. Beijing Electronic Science and Technology Institute,Beijing 100070,China;3. State Key Laboratory of Information Security,Institute of Software,Chinese Academy of Science,Beijing 100080,China
Abstract：In many practical applications of information security,an authenticated-encryption scheme is often constructed by appropriately combining an encryption scheme and a message authentication code.Using this scheme,the same message must be deal with in two-pass,not only using two keys,but also having low efficiency.Based on CBC mode,we propose a new one-pass authenticated encryption mode OXCBC,which provides privacy and authenticity simultaneously.OXCBC uses only one key and a nonce and is more efficient than other one-pass authenticated encryption schemes.We prove OXCBC secure,quantifying the adversary's ability to violate the mode's authenticity in terms of the quality of its block cipher as a strong PRP.
2009, Vol. 1 