What does "decryption" mean?

The process reversing an encryption; the process which converts encrypted data into its original form.

How do you pronounce "decryption"?

Pronounced //dɪˈkɹɪpʃən//.

Common synonyms include: decipherment, decoding, cleartext, deciphering, plaintext, plaintext recovery.

/dɪˈkɹɪpʃən/ noun

noun ·Rare ·Advanced level

Noun

1
The process reversing an encryption; the process which converts encrypted data into its original form. uncountable, usually
2
the activity of making clear or converting from code into plain text wordnet

"I don't have a decryption program."

Verbal noun of decrypt, from de- + crypt (only attested in compounds, such as cryptogram) from Ancient Greek κρυπτός (kruptós, “hidden”).