Sure but I was responding to the point that a diary can't be searched. It can be. The key difference is that doing this for analog conversations was expensive f

Sure but I was responding to the point that a diary can't be searched. It can be. The key difference is that doing this for analog conversations was expensive for the police as it required them to devote finite human time. Digital is not the case. Comparing to analog is I think flawed because even if it mapped 1-to-1 it does allow for a level of search that is problematic given the low cost of digital surveillance.