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Paper 2014/613
A Security Analysis of the Composition of ChaCha20 and Poly1305
Gordon Procter
Abstract
This note contains a security reduction to demonstrate that Langley's composition of Bernstein's ChaCha20 and Poly1305, as proposed for use in IETF protocols, is a secure authenticated encryption scheme. The reduction assumes that ChaCha20 is a PRF, that Poly1305 is epsilon-almost-Delta-universal, and that the adversary is nonce respecting.
Metadata
- Available format(s)
-
PDF
- Category
- Secret-key cryptography
- Publication info
- Preprint.
- Contact author(s)
- gordon procter 2011 @ live rhul ac uk
- History
- 2014-08-13: received
- Short URL
- https://ia.cr/2014/613
- License
-
CC BY
