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The Online Certificate Status Protocol (OCSP) stapling, formally known as the TLS Certificate Status Request extension, is a standard for checking the revocation status of X.509 digital certificates. [1] It allows the presenter of a certificate to bear the resource cost involved in providing Online Certificate Status Protocol (OCSP) responses ...
RFC 8954: OCSP Nonce Extension. 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 ...
Certificate Transparency. Certificate Transparency ( CT) is an Internet security standard for monitoring and auditing the issuance of digital certificates. [1] When an internet user interacts with a website, a trusted third party is needed to assure the user that the website is legitimate and that the website's encryption key is valid.
SSL/TLS does not prevent the indexing of the site by a web crawler, and in some cases the URI of the encrypted resource can be inferred by knowing only the intercepted request/response size. This allows an attacker to have access to the plaintext (the publicly available static content), and the encrypted text (the encrypted version of the ...
HTTP Strict Transport Security. HTTP Strict Transport Security ( HSTS) is a policy mechanism that helps to protect websites against man-in-the-middle attacks such as protocol downgrade attacks [1] and cookie hijacking. It allows web servers to declare that web browsers (or other complying user agents) should automatically interact with it using ...
Server Name Indication. Server Name Indication ( SNI) is an extension to the Transport Layer Security (TLS) computer networking protocol by which a client indicates which hostname it is attempting to connect to at the start of the handshaking process. [1] The extension allows a server to present one of multiple possible certificates on the same ...
Problems with certificate revocation lists. Best practices require that wherever and however certificate status is maintained, it must be checked whenever one wants to rely on a certificate. Failing this, a revoked certificate may be incorrectly accepted as valid. This means that to use a PKI effectively, one must have access to current CRLs.
HTTP Public Key Pinning ( HPKP) is an obsolete Internet security mechanism delivered via an HTTP header which allows HTTPS websites to resist impersonation by attackers using misissued or otherwise fraudulent digital certificates. [1] A server uses it to deliver to the client (e.g. web browser) a set of hashes of public keys that must appear in ...