D defs.my
Entry 2 senses Webster, 1913

cryptanalysis

· crypt·a·nal·y·sis · IPA
01 n. the science which studies methods to discovering the secret meaning of encrypted messages for which one does not possess the secret decodin…
  1. 1.
    the science which studies methods to discovering the secret meaning of encrypted messages for which one does not possess the secret decoding information (called the key). See: key
  2. 2.
    the methods and procedures used to discover the secret meaning hidden in encrypted messages.