See Eavesdropping.

Externally flushing or invalidating a cache line from a processor cache. The flushing or invalidating transaction is issued by the processor agent and is referred to as a "snoopy transaction." This action occurs when one processor in the system loads or stores to a dirty line in the cache of another processor, or when a processor stores to a line that is shared by one or more processors in the system.

A security breach involving illicit viewing.

Passively watching a network for information that could be used to a hacker's advantage, such as passwords. Usually done while Camping Out.

Looking into the packet to obtain information.