From Pine View Farm

It’s All about the Algorithm, Forensic Science Fiction Dept. 0

The EFF questions the justice of trial by algorithm. Here’s a bit from the introduction to the article (emphasis added):

One of the most common forms of forensic programs is probabilistic genotyping software. It is used by the prosecution to examine DNA mixtures, where an analyst doesn’t know how many people contributed to the sample (such as a swab taken from a weapon). These programs are designed to make choices about how to interpret the data, what information to disregard as likely irrelevant, and compute statistics based on how often the different genes appear in different populations—and all of the different programs do it differently. These assumptions and processes are subject to challenge by the person accused of a crime. For that challenge to be meaningful, the defense team must have access to source code and other materials used in developing the software.

The software vendors claim both that the software contains valuable secrets that must not be disclosed and that their methods are so well-vetted that there’s no point letting a defendant question them. Obviously, both can’t be true, and in fact it’s likely that neither is true.

Remember, those magical “forensic” results you see on television shows like the CSI’s and NCIS are fiction. Based on actual forensics, yes, but carried to extremes. For a dose of reality, watch Forensic Files.

Aside:

I do like NCIS (the original, that is), but one thing I find really annoying is the flying windows on the computer screen when McGee is hacking into a computer. Real hacking is not like that (I know–I’ve studied it in legal–and safe–tutorials). Real hacking is almost all tedious command line activity. And the last thing any hacker wants to do is use so much of the target computer’s computing power that it attracts notice. All those flying windows would put the target computer’s cooling fans into high gear . . . .

Grumble grumble grumble.

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