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  2. Classified information in the United States - Wikipedia

    en.wikipedia.org/wiki/Classified_information_in...

    The United States government classification system is established under Executive Order 13526, the latest in a long series of executive orders on the topic of classified information beginning in 1951. [ 1 ] Issued by President Barack Obama in 2009, Executive Order 13526 replaced earlier executive orders on the topic and modified the regulations ...

  3. TVXQ - Wikipedia

    en.wikipedia.org/wiki/TVXQ

    TVXQ (stylized as TVXQ!/DBSK; Korean: 동방신기; Hanja: 東方神起; RR: Dongbangsingi; lit. Rising Gods of the East), known as Tohoshinki in Japan, is a South Korean pop duo formed by SM Entertainment, composed of U-Know Yunho and Max Changmin. Originally a five-member boy band which also consisted of members Hero Jaejoong, Micky Yoochun ...

  4. List of U.S. security clearance terms - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._security...

    T3 or T3R - Tier 3 or Tier 3 Reinvestigation, now replace all NACLC. T5 and T5R - Tier 5 or Tier 5 Reinvestigation, now replace SSBI and SBPR respectively. Yankee White – An investigation required for personnel working with the President and Vice President of the United States. Obtaining such clearance requires, in part, an SSBI.

  5. Security clearance - Wikipedia

    en.wikipedia.org/wiki/Security_clearance

    United States. [edit] In the United States, a security clearance is an official determination that an individual may access information classified by the United States Government. Security clearances are hierarchical; each level grants the holder access to information in that level and the levels below it.

  6. Public key infrastructure - Wikipedia

    en.wikipedia.org/wiki/Public_key_infrastructure

    A single sign-on server will issue digital certificates into the client system, but never stores them. Users can execute programs, etc. with the temporary certificate. It is common to find this solution variety with X.509-based certificates. [26] Starting Sep 2020, TLS Certificate Validity reduced to 13 Months.

  7. Online Certificate Status Protocol - Wikipedia

    en.wikipedia.org/wiki/Online_Certificate_Status...

    The Online Certificate Status Protocol (OCSP) is an Internet protocol used for obtaining the revocation status of an X.509 digital certificate. [2] It is described in RFC 6960 and is on the Internet standards track. It was created as an alternative to certificate revocation lists (CRL), specifically addressing certain problems associated with ...

  8. Certificate signing request - Wikipedia

    en.wikipedia.org/wiki/Certificate_signing_request

    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. The CSR usually contains the public key for which the ...

  9. Digital signature - Wikipedia

    en.wikipedia.org/wiki/Digital_signature

    Checking revocation status requires an "online" check; e.g., checking a certificate revocation list or via the Online Certificate Status Protocol. [15] Very roughly this is analogous to a vendor who receives credit-cards first checking online with the credit-card issuer to find if a given card has been reported lost or stolen.