15 lines
539 B
Markdown
15 lines
539 B
Markdown
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# Real World Crypto 101
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My notes when reading
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[Real-World Cryptography](https://www.manning.com/books/real-world-cryptography)
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**Hash** function convert from input to digest:
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- Pre-image resistance: Given digest, can not find input
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- Second pre-image resistance: Given input, digest, can not find another input
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produce same digest. Small change to input make digest big change.
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- Collision resistance: Can not find 2 input produce same digest.
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**MAC** aka Message Authentication Code produce from key, message to
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authentication tag.
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