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X.509 facts for kids

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In cryptography, X.509 is a common "PKI" (public key infrastructure) used to manage digital certificates and public-key encryption and a key part of the Transport Layer Security protocol used to secure web and email communication. X.509 specifies ways in which public key certificates, certificate revocation lists, attribute certificates, and a certification path validation algorithms are formatted.

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X.509 Facts for Kids. Kiddle Encyclopedia.