sniffer

A virus that usually comes in the form of an e-mail attachment. A sniffer is a program that steals and spreads passwords.

The term is also used to describe software for snooping; for example, the majority of instant messages are sent over a public network without encryption, making it easy for sniffers to eavesdrop on conversations in real time.

See also : Trojan horse  
NetLingo Classification: Technical Terms

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