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In cryptography, a client certificate is a type of digital certificate that is used by client systems to make authenticated requests to a remote server. [1] Client certificates play a key role in many mutual authentication designs, providing strong assurances of a requester's identity.
The WebID-TLS protocol (formerly known as FOAF+SSL [1]) is a decentralized and secure authentication protocol built upon the profile information as well as the Transport Layer Security (TLS) client certificates available in virtually all modern web browsers.
Signature-based client authentication using an already existing certificate would be the preferred mechanism but in many use cases is not possible or not supported by the given deployments. As an alternative, SCEP just provides the use of a shared secret, which should be client-specific and used only once.
In addition, the certificate authority that issues the client certificate is usually the service provider to which client connects because it is the provider that needs to perform authentication. Some service providers even offer free SSL certificates as part of their packages. [5]
Some strong authentication protocols for web-based applications that are occasionally used include: Public key authentication (usually implemented with a HTTPS / SSL client certificate) using a client certificate. Kerberos or SPNEGO authentication, employed for example by Microsoft IIS running configured for Integrated Windows Authentication (IWA).
Download QR code; Print/export ... the received certificate is properly for "example.com" and ... The system can also be used for client authentication in order to ...
A single sign-on server will issue digital certificates into the client system, but never stores them. Users can execute programs, etc. with the temporary certificate. It is common to find this solution variety with X.509-based certificates. [26] Starting Sep 2020, TLS Certificate Validity reduced to 13 Months.
The Enrollment over Secure Transport, or EST is a cryptographic protocol that describes an X.509 certificate management protocol targeting public key infrastructure (PKI) clients that need to acquire client certificates and associated certificate authority (CA) certificates. EST is described in RFC 7030.