Ivan Damgard is a professor in the Department of Computer Science at Aarhus University in Denmark. He is the co-inventor of the Merkle-Damgard construction, and which was used in MD5, SHA-1 and SHA-2. In 2020, he received the Test of Time Award for a paper entitled "A Generalisation, a Simplification and Some Applications of Paillier's Probabilistic Public-Key System", and in 2021 he received an ACM award for the Test of Time for a paper entitled "Multiparty unconditionally secure protocols. In 2010, he was elected as a Fellow of the International Association for Cryptologic Research. Ivan has also co-founded two cryptography companies: Cryptomathic and Partisia.

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