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While extremely valuable for strong authentication, biometric datasets contain sensitive personally identifiable information that criminal organization could leverage to commit fraud, impersonate identities or gain unauthorized access into ePassport-protected countries. Extended Access Control technology helps protect these invaluable biometric datasets from being stolen and used for malicious gain. The requirements for Extended Access Control dictate a unique Public Key Infrastructure (PKI) design; one that does not include revocation of public keys. Strong protection for the confidentiality of the reader's private key must be relied upon instead. This is a more brittle solution than public-key revocation, because there is no way to recover when it goes wrong. However, with careful system design, sufficiently reliable and secure solutions can be created.
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