Secure Hash Algorithm (SHA) Hash Family

SHA-1

160-bits: 256- 384- 512- bit variants

SHA-3 (Keccack)

Sponge construction (neat alternative to Merkle-Damgård)

MD5 Hash

  • 128-bits
  • Pre-image attack in $$2^{123}$$ work
  • Collisions in $$2^{64}$$ work (computationally feasible in 2014)
    • Flaws discovered that can generate collisions much sooner

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