Epoch Key
Epoch keys are public, temporary, identifiers for users.
- Unique epoch keys are generated for each user in each epoch.
- They are the users' temporary personas, allowing anonymous interaction with others.
- Epoch keys receive attestations to change user data.
- An epoch key is computed by:
hash4([identitySecret, attesterId, epoch, nonce])
where nonce can be any value between 0 and numEpochKeyNoncePerEpoch - 1, so that a user can have numEpochKeyNoncePerEpoch epoch keys per epoch.
- Only a user knows their
identitySecret, so only they know if they have received an attestation; others see an attestation given to a random value. - In the epoch key proof circuit, a user can prove that they own an
epochKey, and so are able to receive and process attestations given to thatepochKey.
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