Http://eprint.iacr.o Rg/2014/613.pdf

613.pdf
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📊 Size: 329 KB
📄 Pages: 6 pages
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Summary

This note provides a security reduction to demonstrate that the composition of ChaCha20 and Poly1305 is a secure authenticated encryption scheme, assuming ChaCha20 is a PRF and Poly1305 is ϵ-almost-∆-universal, and the adversary is nonce respecting. The composition combines ChaCha20, a stream cipher, with Poly1305, a universal hash function, to provide both indistinguishability under chosen plaintext attacks (IND-CPA) and integrity of ciphertexts (INT-CTXT). The security analysis uses a series of games to prove that the composition achieves IND$-CPA security, which implies IND-CCA security.

Description

This note provides a security reduction to demonstrate that the composition of ChaCha20 and Poly1305 is a secure authenticated encryption scheme, assuming...

Technical Information

  • File Format: PDF
  • File Size: 329 KB
  • Pages: 6
  • Language: EN
  • Total Downloads: 280
  • Last Updated: 1 month ago

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