My guest onthis week’s Innovators showis Erin Kenneally, a lawyer who helps law enforcement agencies think about digital forensics, and about the authenticity of evidence in a connected world. Methods that were considered best practices not long ago — like shutting down computers, capturing images, and analyzing them — are no longer practical in an ecosystem of always-on services. It’s tempting to say that cyberspace rewrites all the rules of the game, but as Erin points out, that’s not really really true. There are always logs, and people responsible for those logs, and procedures for managing those logs — in physical as well as in virtual space. When a case comes before a judge, a well-documented set of best practices regarding physical custody of computer systems is likely to be as relevant as the cryptographic methods that may have been used to protect and validate the bits.

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