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S/MIME. S/MIME ( Secure/Multipurpose Internet Mail Extensions) is a standard for public-key encryption and signing of MIME data. S/MIME is on an IETF standards track and defined in a number of documents, most importantly RFC 8551. It was originally developed by RSA Data Security, and the original specification used the IETF MIME specification ...
Email authentication. Email authentication, or validation, is a collection of techniques aimed at providing verifiable information about the origin of email messages by validating the domain ownership of any message transfer agents (MTA) who participated in transferring and possibly modifying a message. The original base of Internet email ...
Public key infrastructure. A public key infrastructure ( PKI) is a set of roles, policies, hardware, software and procedures needed to create, manage, distribute, use, store and revoke digital certificates and manage public-key encryption. The purpose of a PKI is to facilitate the secure electronic transfer of information for a range of network ...
DMARC. Domain-based Message Authentication, Reporting and Conformance ( DMARC) is an email authentication protocol. It is designed to give email domain owners the ability to protect their domain from unauthorized use, commonly known as email spoofing. The purpose and primary outcome of implementing DMARC is to protect a domain from being used ...
Authenticated Received Chain. Authenticated Received Chain ( ARC) is an email authentication system designed to allow an intermediate mail server like a mailing list or forwarding service to sign an email's original authentication results. This allows a receiving service to validate an email when the email's SPF and DKIM records are rendered ...
If you're ever concerned about the legitimacy of these emails, just check to see if there's a green "AOL Certified Mail" icon beside the sender name. When you open the email, you'll also see the Certified Mail banner above the message details. When you get a message that seems to be from AOL, but it doesn't have those 2 indicators, and it isn't ...
Army Knowledge Online ( AKO) was a web application that provided enterprise information services to the United States Army, joint, and Department of Defense customers. AKO was sunset in 2021. [1] The remaining following information is historical in nature. Enterprise services were provided to those customers on both classified and unclassified ...
Public key certificate. In cryptography, a public key certificate, also known as a digital certificate or identity certificate, is an electronic document used to prove the validity of a public key. [1] [2] The certificate includes the public key and information about it, information about the identity of its owner (called the subject), and the ...