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.
Symmetric encryption is the process of converting readable data unreadable format and converting it back to readable format using same key. Symmetric encryption algorithms use the same key for encryption and decryption.ou will learn the terms encryption, encryption algorithm encryption key and symmetric encryption in this lesson. Cryptography is the art and science of making data impossible to read.