Document the vault "interchangable passphrases" artefact in the changelog
Marco Ricci

Marco Ricci commited on 2025-01-28 14:09:47
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+### Added
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+  - [`Vault`][derivepassphrase.vault.Vault] now can report on whether two
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+    master passphrases are interchangable with respect to the service
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+    passphrases they can derive.
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+    This is an artefact of how the master passphrase is converted to the
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+    random bit sequence with which the service passphrases are generated.
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+    See the corresponding [FAQ entry: What are "interchangable passphrases"
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+    in vault?][INTERCHANGABLE_PASSPHRASES] for details, including the
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+    practical security (non-)implications.
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+
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+    The `derivepassphrase vault` command-line interface does not address
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+    this in any manner, mostly because the "non-standard" interchangable
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+    variants of a given master password tend to be ugly to type in, and
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+    because they do not have practical security implications.
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+
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+[INTERCHANGABLE_PASSPHRASES]: ../explanation/faq-vault-interchangable-passphrases.md
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