Chinese mathematician Wang Xiaoyun has decoded two international cipher systems, MD5 and SHA-1, spotting loopholes in the latter.
Wang, aged 40, graduated from the mathematics department of Shandong University and currently serves as a director of the Information Safety Institute in Shandong University.
Professor Wang first declared her research results on MD5 at an international cryptography conference held in the United States in August 2004. Then, in February, she made a breakthrough in spotting loopholes in SHA-1.
The two systems are widely used for digital signatures in E-commerce.
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