Internet-Draft submission
Submission status: Posted
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Meta-data from the submission
Document | draft-irtf-cfrg-xchacha |
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Revision | 00 |
Group | Crypto Forum (CFRG) |
Document date | 2019-04-09 |
Submission date | 2019-04-09 |
Title | XChaCha: eXtended-nonce ChaCha and AEAD_XChaCha20_Poly1305 |
Author count | 1 author |
Author 1 |
Scott Arciszewski
<security@paragonie.com>
Paragon Initiative Enterprises United States (understood to be United States of America) |
Abstract |
The eXtended-nonce ChaCha cipher construction (XChaCha) allows for ChaCha-based ciphersuites to accept a 192-bit nonce with similar guarantees to the original construction, except with a much lower probability of nonce misuse occurring. This enables XChaCha constructions to be stateless, while retaining the same security assumptions as ChaCha. This document defines XChaCha20, which uses HChaCha20 to convert the key and part of the nonce into a subkey, which is in turn used with the remainder of the nonce with ChaCha20 to generate a pseudorandom keystream (e.g. for message encryption). This document also defines AEAD_XChaCha20_Poly1305, a variant of [RFC7539] that utilizes the XChaCha20 construction in place of ChaCha20. |
Page count | 15 |
File size | 28.3 KB |
Formal languages used | None recognized |
Submission additional resources | None |
Submitter information
Name | Scott Arciszewski |
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Email address | security@paragonie.com |
Replaced documents
Replaces | draft-arciszewski-xchacha |
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History
Date | By | Event |
---|---|---|
2019-06-12 | Cindy Morgan | Posted submission manually |
2019-06-09 | Sent full access URL to: Scott Arciszewski <security@paragonie.com> | |
2019-06-08 | Sent full access URL to: Scott Arciszewski <security@paragonie.com> | |
2019-05-07 | Sent full access URL to: Scott Arciszewski <security@paragonie.com> | |
2019-05-07 | Sent full access URL to: Scott Arciszewski <security@paragonie.com> | |
2019-04-09 | Edited abstract, note, submitter and sent request for manual post | |
2019-04-09 | Uploaded submission |
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