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  2. Certificate authority - Wikipedia

    en.wikipedia.org/wiki/Certificate_authority

    In cryptography, a certificate authority or certification authority (CA) is an entity that stores, signs, and issues digital certificates. A digital certificate certifies the ownership of a public key by the named subject of the certificate. This allows others (relying parties) to rely upon signatures or on assertions made about the private key ...

  3. Digital signature - Wikipedia

    en.wikipedia.org/wiki/Digital_signature

    A digital signature is a mathematical scheme for verifying the authenticity of digital messages or documents. A valid digital signature on a message gives a recipient confidence that the message came from a sender known to the recipient. [1] [2]

  4. Public key certificate - Wikipedia

    en.wikipedia.org/wiki/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 digital signature of ...

  5. 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. The CSR usually contains the public key for which the certificate should be issued ...

  6. Companies House - Wikipedia

    en.wikipedia.org/wiki/Companies_House

    Companies House was a member of the Public Data Group, an advisory board which between 2011 and 2015 sought to improve public access to government data. [25] Companies House is also responsible for dissolving companies. [26] In 2020, there were approximately 4.3 million businesses on the Companies House register. [27]

  7. E-commerce identification and identification types - Wikipedia

    en.wikipedia.org/wiki/E-commerce_identification...

    It contains your name, a serial number, expiration dates, a copy of the certificate holder's public key (used for encrypting messages and digital signatures), and the digital signature of the certificate-issuing authority so that a recipient can verify that the certificate is real. Some digital certificates conform to a standard, X.509. Digital ...