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  2. DomainKeys Identified Mail - Wikipedia

    en.wikipedia.org/wiki/DomainKeys_Identified_Mail

    DomainKeys Identified Mail (DKIM) is an email authentication method designed to detect forged sender addresses in email (email spoofing), a technique often used in phishing and email spam. DKIM allows the receiver to check that an email that claimed to have come from a specific domain was indeed authorized by the owner of that domain. [1]

  3. Sender Policy Framework - Wikipedia

    en.wikipedia.org/wiki/Sender_Policy_Framework

    Sender Policy Framework (SPF) is an email authentication method that ensures the sending mail server is authorized to originate mail from the email sender's domain. [1] [2] This authentication only applies to the email sender listed in the "envelope from" field during the initial SMTP connection.

  4. Authenticated Received Chain - Wikipedia

    en.wikipedia.org/wiki/Authenticated_Received_Chain

    Even if the SPF and DKIM validation fail, the receiving service can choose to validate the ARC chain. If it indicates that the original message passed the SPF and DKIM checks, and the only modifications were made by intermediaries trusted by the receiving service, the receiving service may choose to accept the email.

  5. Email authentication - Wikipedia

    en.wikipedia.org/wiki/Email_authentication

    The SPF verifier queries the Domain Name System (DNS) for a matching SPF record, which if it exists will specify the IP addresses authorized by that domain's administrator. The result can be "pass", "fail", or some intermediate result - and systems will generally take this into account in their anti-spam filtering.

  6. Certificate signing request - Wikipedia

    en.wikipedia.org/wiki/Certificate_signing_request

    In public key infrastructure (PKI) systems, a certificate signing request (CSR or certification request) is a message sent from an applicant to a certificate authority of the public key infrastructure (PKI) in order to apply for a digital identity certificate.

  7. Sender ID - Wikipedia

    en.wikipedia.org/wiki/Sender_ID

    The pra tries to counter the problem of phishing, while SPF or mfrom tries to counter the problem of spam bounces and other auto-replies to forged Return-Paths. Two different problems with two different proposed solutions. However, Sender-ID and SPF yield the same result in approximately 80% of the cases, according to a billion message analysis ...

  8. Security Policy Framework - Wikipedia

    en.wikipedia.org/wiki/Security_Policy_Framework

    The Security Policy Framework (or "SPF") is a set of high-level policies on security, mainly affecting the UK government and its suppliers. [1] [2] The structure has changed over time. Version 11 was published in October 2013; it has 20 "Mandatory Requirements" grouped into four policy areas.

  9. Individual physical proficiency test - Wikipedia

    en.wikipedia.org/wiki/Individual_physical...

    When National Service was first introduced in Singapore in 1967, the physical fitness test included a 4.8 km (3.0 mi) run to be completed within 30 minutes, and the completion of a 9.6 km (6.0 mi) run within 70 minutes while wearing the skeletal battle order (a type of load-bearing equipment).