- The definition of a chap is a man or boy.
A man is an example of a chap.
- To chap is defined as to become cracked or dry.
When your skin becomes dry and prone to cracking, this is an example of a time when your skin begins to chap.
A young chap.
chap definition by Webster's New World
Origin: probably ; from Middle English cheppe ; from uncertain or unknown; perhaps
Origin: ; from chapman
Origin: Middle English chappen, variant, variety of choppen: see chop
chap definition by American Heritage Dictionary
verb chapped chapped, chap·ping, chaps verb, transitive
Origin: Middle English chappen.
Origin: Short for chapman.
chap - Computer Definition
An authentication scheme used in Pointto-Point Protocol (PPP) remote access servers (RASs) to validate the identity of a remote user. CHAP employs a challenge-response mechanism that challenges the remote user with a random number.The user responds with a digest, which is an encrypted password based on the random number challenge.The RAS then decrypts the password using that same random number key to verify the identity of the remote user. This approach is much more secure that the predecessor Password Authentication Protocol (PAP). See also authentication, encryption, PAP, password, PPP, and RAS.
(Challenge Handshake Authentication Protocol) An access control protocol for dialing into a network that provides a moderate degree of security. When the client logs onto the network, the network access server (NAS) sends the client a random value (the challenge). The client encrypts the random value with its password, which acts as an encryption key. It then sends the encrypted value to the NAS, which forwards it along with the challenge and username to the authentication server. The CHAP server encrypts the challenge with the password stored in its database for the user and matches its results with the response from the client. If they match, it indicates the client has the correct password, but the password itself never left the client's machine. See PAP, PPP and challenge/response.