Charles C. Mann's 2002 article describes why we need technology that will fail smartly:
[Bruce Schneier, a famous ex-cryptographer,] is hardly against technologyhe's the sort of person who immediately cases public areas for outlets to recharge the batteries in his laptop, phone, and other electronic prostheses. "But if you think technology can solve your security problems," he says, "then you don't understand the problems and you don't understand the technology." Indeed, he regards the national push for a high-tech salve for security anxieties as a reprise of his own early and erroneous beliefs about the transforming power of strong crypto. The new technologies have enormous capacities, but their advocates have not realized that the most critical aspect of a security measure is not how well it works but how well it fails.[...]
"The trick is to remember that technology can't save you," Schneier says. "We know this in our own lives. We realize that there's no magic anti-burglary dust we can sprinkle on our cars to prevent them from being stolen. We know that car alarms don't offer much protection. The Club at best makes burglars steal the car next to you. For real safety we park on nice streets where people notice if somebody smashes the window. Or we park in garages, where somebody watches the car. In both cases people are the essential security element. You always build the system around people."