@Misc{Riv98a, author = { Ronald L. Rivest }, title = { Chaffing and Winnowing: Confidentiality without Encryption }, howpublished = { CryptoBytes (RSA Laboratories), volume 4, number 1 (summer 1998), 12--17. }, date = { 1998 }, url = { ftp://ftp.rsasecurity.com/pub/cryptobytes/crypto4n1.pdf }, urla = { CryptoBytes }, OPTmonth = { Summer }, OPTyear = { 1998 }, }