👉 In computer science, a "codeword" is a word or phrase that is used to encode a message in a way that it can be easily decoded by other machines. This means that the codeword must be unique and cannot be made up from the same letters as any other words or phrases. For example, if you want to send a message over an insecure channel, you might use a "codeword" like "hello world" because it is unique and difficult for someone else