Forgive me if I missed it, but there seems to have been little discussion of the link between privacy and identity in this thread. (The list is so noisy that I miss a lot of things.) On most computer systems, one's identity is represented by some secret, whether it's a login password or a private key. Obviously, to maintain the integrity of the identity the secret must be protected which requires privacy. Now whether or not I have "something to hide", I very much want to protect my identity from being usurped. (He who steals my purse steals trash...) Now is it the case that people are interested in stealing identities? Certainly. My account on the CMU Andrew system (where this is being written) was compromised once. Not out of any animosity toward me, but simply as a platform to launch a hacking attack on some other system. (Universities, and I suspect other networks, are rife with packet sniffers. Having been burned once, I rely tremendously on encrypted connections.) This is not to say that one's identity-secret is the only secret worth protecting. But I thought I'd mention it as something to think about. Mike P.S. In a way, credit card numbers are identities --- the fact that we just hand them out to people is very disconcerting. (I'm told that most credit card fraud is by vendors.)