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The "request/response" nature of these messages leads to OCSP servers being termed OCSP responders. Some web browsers (e.g., Firefox [4]) use OCSP to validate HTTPS certificates, while others have disabled it. [5] [6] Most OCSP revocation statuses on the Internet disappear soon after certificate expiration. [7]
OCSP stapling is designed to reduce the cost of an OCSP validation, both for the client and the OCSP responder, especially for large sites serving many simultaneous users. However, OCSP stapling supports only one OCSP response at a time, which is insufficient for certificate chains with intermediate CA certs. [26] [27]
The OpenSSL project was founded in 1998 to provide a free set of encryption tools for the code used on the Internet. It is based on a fork of SSLeay by Eric Andrew Young and Tim Hudson, which unofficially ended development on December 17, 1998, when Young and Hudson both went to work for RSA Security .
Certificates that support certificate transparency must include one or more signed certificate timestamps (SCTs), which is a promise from a log operator to include the certificate in their log within a maximum merge delay (MMD). [4] [3] At some point within the maximum merge delay, the log operator adds the certificate to their log.
Java Java SE network components Thread-safe Depends on java.security.SecureRandom Yes Java based, platform-independent MatrixSSL: C89 None Thread-safe Platform dependent Yes Yes All Mbed TLS: C89 POSIX read() and write(). API to supply your own replacement. Threading layer available (POSIX or own hooks) Random seed set through entropy pool Yes Yes
In the standardized algorithm, the following steps are performed for each certificate in the path, starting from the trust anchor. If any check fails on any certificate, the algorithm terminates and path validation fails. (This is an explanatory summary of the scope of the algorithm, not a rigorous reproduction of the detailed steps.)
The Online Certificate Status Protocol (OCSP) governs real-time confirmation of certificate validity. PKIX Certificate and CRL Profile (RFC 3280). The first part of the four-part standard under development by the Public-Key Infrastructure (X.509) working group of the IETF (known as PKIX) for a public-key infrastructure for the Internet.
SSLeay is an open-source SSL implementation. It was developed by Eric Andrew Young [1] and Tim J. Hudson as an SSL 3.0 implementation using RC2 and RC4 encryption. [2] The recommended pronunciation is to say each letter s-s-l-e-a-y and was first developed by Eric A. Young ("eay"). [3]