'Secure prf' presentation slideshows

Message Authentication Codes (MACs) and Hashes

1.07k views • 74 slides

Message Authentication Codes (MACs) and Hashes

747 views • 74 slides

Review: PRPs and PRFs

Online Cryptography Course Dan Boneh. Using block ciphers. Review: PRPs and PRFs. Block ciphers: crypto work horse. n bits. n bits. E, D. PT Block. CT Block. Key. k bits. Canonical examples: 3DES: n= 64 bits, k = 168 bits

636 views • 54 slides

Security Under Key-Dependent Input

Security Under Key-Dependent Input. Shai Halevi Hugo Krawczyk IBM. Encrypting Your Own Key. Ciphertext = Enc s (s) More generally, Enc s ( some-function-of -s) Why would you want to do this? Seems like an abuse of the cryptosystem How can you expect security?

424 views • 31 slides