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This section discusses best practices and the implications of DIDComm Protocols on the privacy of the communicating parties.

Public Fingerprinting

Users should avoid disclosing supported protocols until sufficient trust has been established. The broad disclosure of supported protocols may provide a unique fingerprint that can be used to correlate multiple identifiers in use by a single party.

DIDComm's use of the Discover Features Protocol allows selective disclosure of features to mitigate this problem. Leveraging this protocol as a better substitute for Verifiable Data Registry (VDR) published DID Document endpoints will prevent the disclosure of unique protocols.