During the last days of the German Democratic Republic (a.k.a. East Germany), the Stasi secret police tried to destroy the more incriminating records they had been keeping on their own citizens. They were only partially successful. And even then, there has been an ongoing project to reassemble those torn-up pieces of paper, by scanning them and doing pattern-recognition to match up the image pieces. Seems the easiest ones are fairly manageable, but now they are getting to smaller fragments, which are proving more of a challenge. <https://www.techdirt.com/articles/20180105/07120838936/stasis-tiny-torn-up-analog-files-defeat-modern-digital-technologys-attempts-to-re-assemble-east-germanys-surveillance-records.shtml>