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A trust-based decision in a specific domain is a multi-stage process. The first step of this process consists in identifying and selecting the proper input data, that is, the trust evidence. In general, these are domain-specific and are derived from an analysis conducted over the application involved. In the next step, a trust computation is ...
In computer security, digital certificates are verified using a chain of trust. [1] The trust anchor for the digital certificate is the root certificate authority (CA).. The certificate hierarchy is a structure of certificates that allows individuals to verify the validity of a certificate's issuer.
A non-technical, social difficulty with a Web of Trust like the one built into PGP/OpenPGP type systems is that every web of trust without a central controller (e.g., a CA) depends on other users for trust. Those with new certificates (i.e., produced in the process of generating a new key pair) will not likely be readily trusted by other users ...
The Microsoft Authenticode code signing system uses X.509 to identify authors of computer programs. The OPC UA industrial automation communication standard uses X.509. SSH generally uses a Trust On First Use security model and doesn't have need for certificates. However, the popular OpenSSH implementation does support a CA-signed identity model ...
A web browser will give no warning to the user if a web site suddenly presents a different certificate, even if that certificate has a lower number of key bits, even if it has a different provider, and even if the previous certificate had an expiry date far into the future.
Identity-based encryption (IBE), is an important primitive of identity-based cryptography. As such it is a type of public-key encryption in which the public key of a user is some unique information about the identity of the user (e.g. a user's email address). This means that a sender who has access to the public parameters of the system can ...
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Further, this definition of trust is abstract, allowing different instances and observers in a trusted system to communicate based on a common idea of trust (otherwise communication would be isolated in domains), where all necessarily different subjective and intersubjective realizations of trust in each subsystem (man and machines) may coexist.