Cryptographic Hash Functions for Data Security

Jan 01, 2025

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Explore the importance of cryptographic hash functions in ensuring data integrity and authenticity while sending messages over untrusted networks. Learn about integrity vs. secrecy, viral attacks, authentication, one-way vs. collision resistance, and more industry standards.

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Cryptographic Hash Functions for Data Security

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Cryptographic Hash Functions and their many applications

Cryptographic Hash Functions and their many applications. Shai Halevi – IBM Research USENIX Security – August 2009. Thanks to Charanjit Jutla and Hugo Krawczyk. What are hash functions?. Just a method of compressing strings E.g., H : {0,1}*  {0,1} 160

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Cryptographic Hash Functions

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Cryptographic Hash Functions

Cryptographic Hash Functions. *Slides borrowed from Vitaly Shmatikov. Hash Functions: Main Idea. Hash function H is a lossy compression function Collision: H(x)=H(x ’ ) for some inputs x≠x ’ H(x) should look “ random ” Every bit (almost) equally likely to be 0 or 1

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