These are applications that try to detect the contents of a message
you’ve sent. Any data that is transferred—e-mail, pictures, files—
are split into data packets and then sent over the Internet. Any
server through which the data packets pass can install a sniffer to
detect the contents of the packet. Files that contain binary data
like pictures or video can also be deciphered, but e-mail messages
and other textual content show up as text in the sniffing application,
making them easier to decipher. The encrypting of messages
is the only way to prevent this from happening.
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