Chris Parsons, an internet security expert with the Toronto-based internet think tank Citizen Lab, told CBC News that “you should be able to communicate with your government without the fear that what you say … could come back to haunt you in unexpected ways.”
Parsons said that there are legitimate cybersecurity purposes for the agency to keep tabs on communications with the government, but he added: “When we collect huge volumes, it’s not just used to track bad guys. It goes into data stores for years or months at a time and then it can be used at any point in the future.”
In a top-secret CSE document on the security operation, dated from 2010, the agency says it “processes 400,000 emails per day” and admits that it is suffering from “information overload” because it is scooping up “too much data.”
The document outlines how CSE built a system to handle a massive 400 terabytes of data from Internet networks each month — including Canadians’ emails — as part of the cyber operation. (A single terabyte of data can hold about a billion pages of text, or about 250,000 average-sized mp3 files.)