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Overview
Comment: | Fix a typo in the hashpolicy.wiki document. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA3-256: |
3b17294dfe5b48365edf4c0287e28698 |
User & Date: | drh 2019-01-07 01:32:14.167 |
Context
2019-01-08
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19:08 | Restore the ability to delete a wiki page. ... (check-in: e947378e user: drh tags: trunk) | |
2019-01-07
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01:32 | Fix a typo in the hashpolicy.wiki document. ... (check-in: 3b17294d user: drh tags: trunk) | |
2019-01-06
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04:27 | Updated the hash policy document, mainly to put it in past tense and to cover the current situation. ... (check-in: df8baf94 user: wyoung tags: trunk) | |
Changes
Changes to www/hashpolicy.wiki.
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38 39 40 41 42 43 44 | In Fossil version 2.0 ([/timeline?c=version-2.0|2017-03-03]), the internal SHA1 implementation was changed from a generic FIPS PUB 180-4 SHA1 implementation to a "Hardened SHA1" [[https://github.com/cr-marcstevens/sha1collisiondetection|1]] [[https://marc-stevens.nl/research/papers/C13-S.pdf|2]]. | | | 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | In Fossil version 2.0 ([/timeline?c=version-2.0|2017-03-03]), the internal SHA1 implementation was changed from a generic FIPS PUB 180-4 SHA1 implementation to a "Hardened SHA1" [[https://github.com/cr-marcstevens/sha1collisiondetection|1]] [[https://marc-stevens.nl/research/papers/C13-S.pdf|2]]. The Hardened SHA1 algorithm automatically detects when the artifact being hashed is specifically designed to exploit the known weaknesses in the SHA1 algorithm, and when it detects such an attack it changes the hash algorithm (by increasing the number of rounds in the compression function) to make the algorithm secure again. If the attack detection gets a false possible, that means that Hardened SHA1 will get a different answer than the standard FIPS PUB 180-4 SHA1, but the creators of Hardened SHA1 (see the second paper |
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