Decryption
In plain terms
Converting encrypted data back into readable form.
Going deeper
Decryption uses the correct key and algorithm to reverse encryption, restoring ciphertext to its original plaintext. Only authorized key-holders can do it.
Under the hood
Security hinges on key secrecy; the algorithm is public, the key is the secret.
Examples
Reading HTTPS traffic, opening encrypted files, TLS, message decryption.
Think of it like...
Like using the right key to unlock a coded message back into plain words.