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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.
The OCSP stapling protocol is an alternative that allows servers to cache OCSP responses, which removes the need for the requestor to directly contact the OCSP responder. Browser support [ edit ]
OCSP stapling can solve the operational challenges of OCSP, namely additional network requests causing latency and privacy degradation. [33] However, it can be susceptible to downgrade attacks by an on-path attacker. [9] RFC 7633 defines an extension that embeds a requirement into a certificate to be stapled to a valid OCSP response. [34]
Diagram of a public key infrastructure. A public key infrastructure (PKI) is a set of roles, policies, hardware, software and procedures needed to create, manage, distribute, use, store and revoke digital certificates and manage public-key encryption.
This version added flags for control of HTTP/2 and OCSP Stapling per site, a compression API and implementing module supporting both gzip and brotli schemes, and a UI for configuring HSTS. [16] IIS 10.0 on Windows 11 and Windows Server 2022 has native support for HTTP/3.
OpenSSL is a software library for applications that provide secure communications over computer networks against eavesdropping, and identify the party at the other end. It is widely used by Internet servers, including the majority of HTTPS websites.
Browsers and other relying parties might use CRLs, or might use alternate certificate revocation technologies (such as OCSP) [4] [5] or CRLSets (a dataset derived from CRLs [6]) to check certificate revocation status. Note that OCSP is falling out of favor due to privacy and performance concerns [7] [8] [9]. Subscribers and other parties can ...
Worldwide, the certificate authority business is fragmented, with national or regional providers dominating their home market. This is because many uses of digital certificates, such as for legally binding digital signatures, are linked to local law, regulations, and accreditation schemes for certificate authorities.