The opposite of "de-ciphered" is "ciphered," which means to encode or encrypt a message so that it cannot be understood. When a message is ciphered, it is transformed into a secret code, using various methods such as substitution or transposition. This code is then sent or stored as a means of communication, where only those who have the key to decode it can understand it. Ciphering is often used to protect sensitive information or to maintain confidentiality. On the other hand, "de-ciphered" refers to the act of decoding or decrypting a ciphered message to reveal its original meaning.