Which model helps applications determine the legitimacy of a digital certificate?

The Trust Model is essential for applications to assess the legitimacy of a digital certificate. This model establishes a framework for identifying whether a digital certificate is valid and can be relied upon. It dictates how trust is established among different entities, including users and certificate authorities (CAs).

In a Trust Model, applications assess digital certificates against established root certificates and CAs. If a digital certificate chains back to a trusted root certificate, its legitimacy is confirmed. This is crucial for secure communications, as it assures users that they are interacting with legitimate entities, safeguarding against impersonation and fraud.

Understanding the mechanisms of the Trust Model is vital for maintaining the integrity and security of data exchanged over networks, forming the basis for secure transactions and communications.