Talk:Services/Sync/SimplifiedCrypto

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sync key representation

The sync key is represented to the user as:

X-XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

Deriving encryption and HMAC keys from the Sync Key

The hmac used is an SHA-256 HMAC.

(A deep link to Utils.makeHMACKey() would be helpful here.)