A New One-Pass Authenticated Encryption Model

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.