COMPUTER FUNDAMENTALS

COMPUTER NETWORKS AND COMMUNICATIONS

NETWORK SECURITY AND CYBERSECURITY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What type of key is not shared and computers cannot decrypt a message without it?
A
Free key
B
Private key
C
Public key
D
Personal key
Explanation: 

Detailed explanation-1: -Asymmetric encryption is also called public key encryption, but it actually relies on a key pair. Two mathematically related keys, one called the public key and another called the private key, are generated to be used together. The private key is never shared; it is kept secret and is used only by its owner.

Detailed explanation-2: -Only the holder of the private key can encrypt information that can be decrypted with the public key. Any party can use the public key to read the encrypted information; however, data that can be decrypted with the public key is guaranteed to originate with the holder of the private key.

Detailed explanation-3: -Asymmetric cryptography is typically used to authenticate data using digital signatures.

Detailed explanation-4: -Private key encryption systems use a single key that is shared between the sender and the receiver. Both must have the key; the sender encrypts the message by using the key, and the receiver decrypts the message with the same key.

Detailed explanation-5: -A private key, also known as a secret key, is a variable in cryptography that is used with an algorithm to encrypt and decrypt data.

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