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Which security protocol introduces vulnerabilities because the password is sent in plaintext and can be intercepted and easily read?
A. WEP
B. EAP
C. PAP
D. CHAP
Correct Answer: C
Explanation/Reference:
Password authentication protocol
A password authentication protocol (PAP) is an authentication protocol that uses a password.
PAP is used by Point to Point Protocol to validate users before allowing them access to server resources. Almost all network operating system remote servers support PAP.
PAP transmits unencrypted ASCII passwords over the network and is therefore considered unsecure. It is used as a last resort when the remote server does not support a stronger authentication protocol, like CHAP or EAP (the latter is actually a framework).
Password-based authentication is the protocol where two entities share a password in advance and use the password as the basis of authentication. Existing password authentication schemes can be categorized into two types: weak-password authentication schemes and strong-password authentication schemes. When compared to strong-password schemes, weak-password schemes tend to have lighter computational overhead, the designs are simpler, and implementation is easier, making them especially suitable for some constrained environments.
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