Updated Zero-Knowledge Proof-of-Identity

The paper describing Zero-Knowledge Proof-of-Identity has been updated with the latest developments to offer the only practical solution currently available to provide secure, privacy-preserving authentication of National Identity Cards/Biometric passports:

• New subsubsection 4.2.8: Substituting EPID for DCAP
• New subsubsection 4.3.3: Remote attestation for smartphones

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