Dogs in warfare have a long history starting in ancient times. From war dogs trained in combat to their use as scouts, sentries and trackers, their uses have been varied and some continue to exist in modern military usage.
Encryption is the coding or scrambling of information so that it can only be decoded and read by someone who has the correct decoding key. Encryption is used in secure Web sites as well as other mediums of data transfer. If a third party were to intercept the information you sent via an encrypted connection, they would not be able to read it.
Encryption comes from the science of cryptography, which involves the coding and decoding of messages in order to protect their contents. One of the most ancient forms of it is letter substitutionâthus, for instance, sending the next letter in the alphabet instead of the actual letter in the text.