COMPUTER ETHICS AND SECURITY
CRYPTOGRAPHY AND ENCRYPTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Ensure message remains secret during transmission between parties
|
|
|
Ensure message is not altered while in transit between communicating partners
|
|
|
Verifies sender is who she says she is
|
|
|
Proves that nobody but on sender could have sent a particular message
|
Detailed explanation-1: -Explanation: Cryptanalysis is the art & science of cracking the cipher-text without knowing the key.
Detailed explanation-2: -If you can make sense of what is written, then it is in plaintext. Ciphertext, or encrypted text, is a series of randomized letters and numbers which humans cannot make any sense of. An encryption algorithm takes in a plaintext message, runs the algorithm on the plaintext, and produces a ciphertext.
Detailed explanation-3: -Cryptography vs encryption: Cryptography is the science of concealing messages with a secret code. Encryption is the way to encrypt and decrypt data. The first is about studying methods to keep a message secret between two parties (like symmetric and asymmetric keys), and the second is about the process itself.
Detailed explanation-4: -Security (BC-SEC) Available both as freeware and in a low-cost commercial version, PGP is the most widely used privacy-ensuring program by individuals and is also used by many corporations.