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update typo and structures

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2024-12-16 13:41:24 -06:00
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pages/CSE442T/CSE442T_L20.md
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# Lecture 20
## Construction of CRHF (Collision Resistant Hash Function)
## Chapter 5: Authentication
### Construction of CRHF (Collision Resistant Hash Function)
Let $h: \{0, 1\}^{n+1} \to \{0, 1\}^n$ be a CRHF.
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EOP
## Many-time Secure Digital Signature
### Many-time Secure Digital Signature
Using one-time secure digital signature scheme on $\{0,1\}^*$ to construct many-time secure digital signature scheme on $\{0,1\}^*$.