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If you want to make sure that only encrypted passwords are used during authentication, you would use which of the following?
SMTP
PPTP
None of these.
CHAP
HTTP
In computing, the Challenge-Handshake Authentication Protocol (CHAP) authenticates a user or network host to an authenticating entity. That entity may be, for example, an Internet service provider. CHAP is specified in RFC 1994.
It depends what you mean by "secure" :)
CHAP:
Client authentication request send its user name to the server Server responds with a nonce Client calculates hash(nonce|password) and send to the server Server verifies the password Cons:
All data is transmitted in clear text i.e. it possible for an attacker to eavesdrop and brute-force the hash offline The server needs to store the password in clear text
Correct answer is CHAP. Requirement is for only encrypted passwords are sent over the net. CHAP sends hashed (encrypted) password+nonce across the network, meaning that the password is only sent in encrypted form. No other interpretation of this question makes sense.
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