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Which of the following is BEST suited for secure communications within a small group?

Key distribution center

Certification authority

Web of trust

Kerberos Authentication System

Web of trust is a key distribution method suitable for communication in a small group. It ensures
pretty good privacy (PGP) and distributes the public keys of users within a group. Key distribution
center is a distribution method suitable for internal communication for a large group within an
institution, and it will distribute symmetric keys for each session. Certification authority is a trusted
third party that ensures the authenticity of the owner of the certificate. This is necessary for large
groups and formal communication. A Kerberos Authentication System extends the function of a
key distribution center, by generating ‘tickets’ to define the facilities on networked machines which
are accessible to each user.

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