My preferred analogy is paper shredders. Imagine if any criminal could just walk into a store and buy a paper shredder so effective that it's impossible for the FBI to piece the data back together, with or without a warrant, no matter how many resources they throw at it.

Clearly the solution is to require every paper shredder to be equipped with a camera to scan documents and upload them to cloud.gov before shredding. Of course, nobody would be authorized to look at the data without a warrant, and we should trust that nobody working for the government would ever break this law.