Agent cipher – Definition & Meaning

In the field of cryptography, an agent cipher is a type of code used to conceal messages transmitted between agents or spies. It is a complex system of encryption that is designed to keep the information confidential and secure. In this article, we will explore the definition, origin, and meaning of agent cipher.


An agent cipher is a cryptographic code used by spies and agents to encode messages for secure transmission. It is a complex system of encryption that uses a combination of symbols, letters, and numbers to conceal the meaning of the message. The agent cipher is designed to be difficult to break, making it an effective tool for keeping sensitive information confidential.


The origin of agent cipher can be traced back to ancient times when people used codes to protect their messages from being intercepted by enemies. However, the modern agent cipher was developed during World War II when intelligence agencies needed a way to communicate securely with their agents and spies in the field.

Meaning in different dictionaries

The meaning of agent cipher is defined differently in various dictionaries. The Oxford English Dictionary defines it as “a code used by spies and agents to encode messages for secure transmission.” The Merriam-Webster dictionary defines it as “a system of encryption used by spies and agents to keep messages confidential.”


The agent cipher is associated with the field of cryptography and intelligence gathering. It is used by intelligence agencies and spies to communicate securely and keep sensitive information confidential.


Some of the synonyms of agent cipher include code, encryption, cryptogram, and secret writing.


The antonyms of agent cipher include plain text, unencrypted message, and open communication.

The same root words

The same root words of agent cipher include agent, which refers to a person who acts on behalf of another, and cipher, which refers to a secret code or message.

Example Sentences

  1. The spy used an agent cipher to send a message to his handler.
  2. The intelligence agency developed a new agent cipher to keep their communications secure.
  3. The enemy was unable to decipher the agent cipher used by the spy.
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