Tom Gara writes: Let’s run through a little thought experiment.

Imagine there’s a list somewhere that contains every single webpage you have visited in the last five years. It also has everything you have ever searched for, every address you looked up on Google Maps, every email you sent, every chat message, every YouTube video you watched. Each entry is time-stamped, so it’s clear exactly, down to the minute, when all of this was done.

Now imagine that list is all searchable. And imagine it’s on a clean, easy-to-use website. With all that imagined, can you think of a way a hacker, with access to this, could use it against you?

And once you’ve imagined all that, go over to google.com/dashboard, and see it all become reality.

For a piece complementing today’s story on Google and privacy by the WSJ’s Amir Efrati, I took a deep dive into Google Dashboard, a kind of Grand Central Terminus for all the information the company has stored on you. It’s a truly amazing amount, especially if, like me, you have been a heavy Gmail user since its launch in 2004. As long as you are logged into Gmail, or any other Google account, the company isn’t just keeping track of how you use its own service — it’s noting every site you visit on the web. [Continue reading…]