The author asked for keys that people can keep without files. Package
wordkey derives the X25519 identity of words a person chooses, at least
six: their NFD by the tables of pathrule without the marks U+0300 to
U+036F, each code point in lower case by its simple mapping, split at
white space, joined by one space, and stretched with PBKDF2-HMAC-SHA256
of the standard library, 600 000 rounds, salted with the chain hash and
the round of the capsule. It is wordkey.ts of datekeys-ts byte for byte:
both check the same vector.
encrypt takes -words or -words-file for a time_and_key capsule, and adds
the key as one more recipient, derived for the round of -at; decrypt
takes them and adds the identity, for the round the capsule shows. The
format does not change. Checked: the CLI opened a capsule that the page
wrote with words, with the release from the public relays.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
