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The Merkle–Damgård construction — used in the design of many popular hash algorithms such as MD5, SHA1 and SHA2 — is a method of building collision-resistant cryptographic hash functions from collision-resistant one-way compression functions. The Merkle–Damgård construction is also referred to as the Merkle–Damgård hash function.

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Merkle–Damgård transformation example

I m looking at this Example of Merkle–Damgård I have a similar question about this topic. I have hash function maps 256b blocks into 128b blocks, how many rounds are required for hashing a 140K …
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