1) Crack in the NSA 2) Decipher 3) Decode 4) Rewrite 5) Solve the code 6) To decode or decipher 1) Decipher 2) Decode 
Conversion of either encoded or enciphered text into plaintext.
To convert from a code or cipher to plain text; decode.
decrypt, decrypted, decrypting, decryption 1. To solve (a cryptogram) without knowledge of a key. 2. To convert (a cryptogram) into plaintext with proper application of a key.
(DOD) To convert encrypted text into its equivalent plain text by means of a cryptosystem. (This does not include solution by cryptanalysis.) (Note: The term "decrypt" covers the meanings of "decipher" and "decode.")
to decode or decipher.