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08:56:09<aarchi>What hash algorithm does IA use for its digests?
08:56:33<aarchi>For example, the digest for `https://web.archive.org/web/20210224234718if_/https://dumps.wikimedia.org/other/shorturls/shorturls-20210222.gz` is `4PVTM2ICN6HDOXXJ4YIX44DR66IA5RV4`.
08:58:20<aarchi>The digests can be seen by querying the timemap for a URL: `https://web.archive.org/web/timemap/?url=https://dumps.wikimedia.org/other/shorturls/&matchType=prefix&fl=original,timestamp,digest&output=json`
09:00:01<aarchi>It looks like it's base32 with the alphabet [2-7A-Z]
09:02:58<aarchi>That would put it at 160 bits
09:03:30<aarchi>It's probably SHA-1 then
09:54:13<aarchi>Yep it's SHA-1 with the alphabet ABCDEFGHIJKLMNOPQRSTUVWXYZ234567
13:47:38<@JAA>Yep, that's what most WARC software uses.
13:48:02<@JAA>It's just a convention though, and I wonder what IA does with WARCs that use a different format.
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