There's Handycipher[0] from 2014. I remember learning about it from Bruce's blog[1], but haven't a clue how secure it is. [0] http://eprint.iacr.org/2014/257.p

There's Handycipher[0] from 2014. I remember learning about it from Bruce's blog[1], but haven't a clue how secure it is. [0] http://eprint.iacr.org/2014/257.pdf http://eprint.iacr.org/2014/257.pdf [1] https://www.schneier.com/blog/archives/2014/04/a_new_pencil-an.html https://www.schneier.com/blog/archives/2014/04/a_new_pencil-...