What is decryption?

What is decryption?

• A. Process of converting encrypted data into original form
• B. Process of converting plain text to ciphertext
• C. Process of decrypting a password
• D. Process of backing up data

Answer: (A)

Decryption is the process of converting encrypted data back into its original form so it can be read or used. Encryption takes readable information and changes it into ciphertext to hide its content. Decryption reverses that process, using the appropriate algorithm and key to recover the original plaintext. In symmetric systems the same secret key is used for both encryption and decryption; in asymmetric systems, data encrypted with a public key is decrypted with the corresponding private key. This reversibility is what allows secure data to be read by authorized parties while remaining unreadable to others. For example, encrypting a message with a secret key and then decrypting it with that same key restores the original message. The idea of converting plain text to ciphertext describes encryption, not decryption, and backing up data is a separate operation.

Decryption is the process of converting encrypted data back into its original form so it can be read or used. Encryption takes readable information and changes it into ciphertext to hide its content. Decryption reverses that process, using the appropriate algorithm and key to recover the original plaintext. In symmetric systems the same secret key is used for both encryption and decryption; in asymmetric systems, data encrypted with a public key is decrypted with the corresponding private key. This reversibility is what allows secure data to be read by authorized parties while remaining unreadable to others. For example, encrypting a message with a secret key and then decrypting it with that same key restores the original message. The idea of converting plain text to ciphertext describes encryption, not decryption, and backing up data is a separate operation.