Cryptanalyzed refers to the process of decoding or deciphering secret codes, ciphers, and messages. The word belongs to the field of cryptology, which involves the study of codes and secret writing. The antonyms for cryptanalyzed would be words like encrypted, encoded, or secured. These words are used to describe something that is kept secret or hidden. When information is encoded or encrypted, it is difficult for anyone to decipher it without access to the right key or password. The opposite of cryptanalyzed would be something that is completely secure and impenetrable, such as a highly encrypted message that is virtually impossible to decode without the proper tools, knowledge, and expertise.