Cipher is a fictional mutant character, a superhero appearing in American comic books published by Marvel Comics. She is a young African-American woman who first appeared in Young X-Men #8 and was created by Marc Guggenheim and Rafa Sandoval.

Young X-Men was a comic book series published by Marvel Comics. It lasted for 12 issues, from April 2008 through March 2009. The series was written by Marc Guggenheim.