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But all Signal is (threatening to be) doing is blowing up devices that parse all files using insecure software.

Let's look at another case, I remember that some people had USB drivers that detected "wrigglers" and shut down the computer in response to such a wiggler. Would that also be illegal?

If I install anti scan files and anti mouse wrigglers when travelling to China do they become legal then?

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The article quotes the part of the Signal blog that said “a real exploit payload would likely seek to undetectably alter previous reports, compromise the integrity of future reports (perhaps at random!), or exfiltrate data from the Cellebrite machine.” A complex exploit like that would say much more about the author’s intent than a driver that shuts down the computer when a “wiggler” is detected.

But what if Signal's (or anyone else's) exploitation simply locked the device when the file was read, preventing further data extraction?

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