The liberaltarians at Reason provide a run-down of Kerry's record on civil liberties (reason . com/hod/jb072604.shtml):

Then it was Sen. John Ashcroft (R-Mo.) who argued alongside the ACLU in favor of the individual's right to encrypt messages and export encryption software. Ashcroft "was kind of the go-to guy for all of us on the Republican side of the Senate," recalls David Sobel, general counsel of the Electronic Privacy Information Center.

And in what now seems like a bizarre parallel universe, it was John Kerry who was on the side of the FBI, the National Security Agency, and the DOJ...

Although the encryption fight appears to be over, similar battles are being fought today. For instance, as with encryption, the FBI now wants preemptive design mandates so it can have an automatic mechanism to tap into Voice over Internet Protocol, the fledgling technology that allows people to make phone calls online. Once again, law enforcement wants tech firms to build a "back door" for the police. Wayne Crews, director of technology studies at the pro-market Competitive Enterprise Institute, notes that Kerry has been silent on the FBI's efforts. "The only thing I've heard from Kerry on technology regulation is continued investment from the federal government," Crews says...