FUNDAMENTALS OF COMPUTER

COMPUTER THREATS SECURITY

TYPES OF COMPUTER SECURITY

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
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: -Once the sender has the public key, he uses it to encrypt his message. Together, these keys help to ensure the security of the exchanged data. A message encrypted with the public key cannot be decrypted without using the corresponding private key.

Detailed explanation-3: -The sender uses a public key to encrypt the message. The recipient uses its private key to decrypt the message. Public key infrastructure (PKI) is a set of hardware, software, organizations, and policies to public key encryption work on the Internet.

Detailed explanation-4: -Information encrypted using the private key can be decrypted only with the public key. Only the holder of the private key can encrypt information that can be decrypted with the public key.

Detailed explanation-5: -Anyone can encrypt a message by using your public key, but only you can read it. When you receive the message, you decrypt it by using your private key. Similarly, you can encrypt a message for anyone else by using their public key, and they decrypt it by using their private key.

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