secret writing

Thesaurus

Noun	1.	secret writing - a piece of writing in code or cipher cryptogram, cryptograph piece of writing, written material, writing - the work of a writer; anything expressed in letters of the alphabet (especially when considered from the point of view of style and effect); "the writing in her novels is excellent"; "that editorial was a fine piece of writing"
	2.	secret writing - act of writing in code or cipher coding, steganography, cryptography committal to writing, writing - the activity of putting something in written form; "she did the thinking while he did the writing" encoding, encryption - the activity of converting data or information into code recoding - converting from one code to another decipherment, decoding, decryption - the activity of making clear or converting from code into plain text; "a secret key or password is required for decryption"