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2. Self-signed certificate - Wikipedia

   en.wikipedia.org/wiki/Self-signed_certificate

   RFC 5280 defines self-signed certificates as "self-issued certificates where the digital signature may be verified by the public key bound into the certificate" [7] whereas a self-issued certificate is a certificate "in which the issuer and subject are the same entity". While in the strict sense the RFC makes this definition only for CA ...

3. Public key infrastructure - Wikipedia

   en.wikipedia.org/wiki/Public_key_infrastructure

   RAs do not have the signing authority of a CA and only manage the vetting and provisioning of certificates. So in the Microsoft PKI case, the RA functionality is provided either by the Microsoft Certificate Services web site or through Active Directory Certificate Services which enforces Microsoft Enterprise CA, and certificate policy through ...

4. Digital signature - Wikipedia

   en.wikipedia.org/wiki/Digital_signature

   One digital signature scheme (of many) is based on RSA. To create signature keys, generate an RSA key pair containing a modulus, N, that is the product of two random secret distinct large primes, along with integers, e and d, such that e d ≡ 1 (mod φ(N)), where φ is Euler's totient function.

5. 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 ...

6. X.509 - Wikipedia

   en.wikipedia.org/wiki/X.509

   Certificate Signature Algorithm; Certificate Signature; The Extensions field, if present, is a sequence of one or more certificate extensions. [10]: §4.1.2.9: Extensions Each extension has its own unique ID, expressed as object identifier (OID), which is a set of values, together with either a critical or non-critical indication. A certificate ...

7. Certificate authority - Wikipedia

   en.wikipedia.org/wiki/Certificate_authority

   When the user's web browser receives the public key from www.bank.example it also receives a digital signature of the key (with some more information, in a so-called X.509 certificate). The browser already possesses the public key of the CA and consequently can verify the signature, trust the certificate and the public key in it: since www.bank ...