Today's Globe has a story about how computer hackers were able to insert a virus into the computer system of the nearby Tewksbury Police Department and lockup all of the department's computer files. The article reports that neither the state police nor the FBI were able to crack the virus and, because the department's backup tapes were similarly infected, Tewksbury ended up paying a ransom of $500 and got its data back.
Stories like this reinforce my opinion that it's critical for registries of deeds to continue creating microfilm of recorded documents. Many scoff at the idea of microfilm, saying it's an obsolete technology but if properly created and stored, it lasts a long time. While microfilm does have some vulnerabilities, computer viruses aren't among them.