COMPUTER ETHICS AND SECURITY
CRYPTOGRAPHY AND ENCRYPTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Scytale
|
|
|
Running key
|
|
|
Vernam
|
|
|
Enigma
|
Detailed explanation-1: -The Scytale cipher is a type of transposition cipher used since the 7th century BCE. The first recorded use of the scytale cipher was by the Spartans and the ancient Greeks who used it to transport battle information between generals.
Detailed explanation-2: -In cipher. This device, called the scytale, consisted of a tapered baton around which was spirally wrapped a piece of parchment inscribed with the message. When unwrapped the parchment bore an incomprehensible set of letters, but when wrapped around another baton of identical proportions, the original text reappeared.
Detailed explanation-3: -The scytale could have been used for a variety of purposes, including as a messenger authentication stick, as a sort of military name-tag, and as a cryptographic device.
Detailed explanation-4: -(called a scytale) of exactly the same radius. The sender wound a narrow ribbon of parchment around his cylinder, then wrote on it lengthwise. After the ribbon is unwound, the writing could be read only by a person who had a cylinder of exactly the same circumference.