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| Cryptanalysis and Improvement of Two Convertible Authenticated Encryption Schemes |
| Zhang Chuan-rong①②; Fu Xiao-tong①; Xiao Guo-zhen① |
| ①Key Lab. of Computer Network and Information Security of Ministry of Education, Xidian Univ., Xi´an 710071, China; ②Telecomm. Eng. Institute, Air force Engineering Univ., Xi´an 710077, China |
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Abstract Convertible authenticated encryption schemes are studied in this paper. The problems in Wu-Hsu’s scheme (2002) and Huang-Chang’s scheme (2003) are pointed out. Furthermore the improvements of the two schemes are given; for that, the public verification of authenticated encryption schemes is solved as well.
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Received: 20 July 2004
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2006, Vol. 28 
