There's an interesting project called "Honeywords" (one of the authors is Ron Rivest) http://people.csail.mit.edu/rivest/honeywords/ http://people.csail.mit.edu

There's an interesting project called "Honeywords" (one of the authors is Ron Rivest) http://people.csail.mit.edu/rivest/honeywords/ http://people.csail.mit.edu/rivest/honeywords/ Link to paper: http://people.csail.mit.edu/rivest/honeywords/paper.pdf http://people.csail.mit.edu/rivest/honeywords/paper.pdf (see also recent paper "Some Remarks on Honeyword Based Password-Cracking Detection" https://eprint.iacr.org/2014/323.pdf https://eprint.iacr.org/2014/323.pdf)