Answer
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Work Step by Step
Certificate authorities (CAs) are essential in public-key encryption for establishing and verifying the authenticity of digital certificates. These certificates are used to bind cryptographic keys to entities (such as individuals, organizations, or websites), ensuring secure communication.
The CA's role is to validate the identity of the certificate holder and digitally sign the certificate, creating a trusted link between the public key and the entity. This process helps in preventing man-in-the-middle attacks and ensuring the integrity and security of encrypted communication.
