To give the student knowledge about cryptanalytic methods in symmetric encryption (block ciphers and stream ciphers) and hash functions. To update and inform them about current topics of interest, e.g. Quantum Cryptography, Crypto-Currencies like Bitcoin. En studerende, der fuldt ud har opfyldt kursets mål, vil kunne:

• explain the ideas of linear cryptanalysis, higher order differential attacks, truncated differential attacks, impossible differential attacks on block ciphers
• explain the concepts of collision attacks, preimage attacks and of multi-collisions for hash functions
• understand and quantum cryptography can and can not do
• understand how crypto-currencies like bitcoin work
• evaluate critically the presented topics from a technical-scientific point of view
• make an oral presentation of a selected scientific article
• search the scientific literature for further information in relation to the selected article
• act as an active listener at scientific seminars

Block ciphers: linear cryptanalysis, higher order differential attacks, truncated differential attacks, impossible differential attacks, interpolation attacks.
Hash functions: collision attacks, preimage attacks, multi-collisions, the SHA3 competition.
Current Topics: Quantum Cryptography, Proof-of-work schemes, Bitcoin 15. maj, 2019