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Lecture 3: Stream Ciphers, Random Numbers and the One Time Pad by Christof Paar

Lecture 7: Introduction to Galois Fields for the AES by Christof Paar

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Lecture 18: Digital Signatures and Security Services by Christof Paar

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Lecture 22: MAC (Message Authentication Codes) and HMAC by Christof Paar

Lecture 9: Modes of Operation for Block Ciphers by Christof Paar

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Lecture 19: Elgamal Digital Signature by Christof Paar