find out personal and financial information about you
In short, other people having access to your email is A Bad Thing™
Protect access to your accounts by using “Two Factor Authentication”. Your password is one “factor” by which you authenticate to a website. But passwords are guessed or stolen all the time. A second “factor”, like posession of your mobile phone, is a useful second check.
When you use two-factor authentication you raise a high barrier for anyone wanting to take over your account. Try it by giving your email password to a friend and asking them to login to your webmail from their computer. They won’t be able to, without having the unique, one-time code that your phone gives you!
You will need to enable two-factor authentication for each separate website (or service) that supports it.
Therefore, if you want to use something like Dropbox while protecting your data, you should:
Install the free TrueCrypt encryption software on your computer
Create a TrueCrypt file container. This will be the file that will contain all sensitive files you need to protect. Let’s call it “private.tc”.
When you open (“mount”) “private.tc” in TrueCrypt it will appear similar to a USB drive on your computer. Anything you save there, will be protected by the TrueCrypt container and will not be readable to others.
Save & close (an operation called “unmount”) your new “private.tc” container.
Now move “private.tc” in your Dropbox folder and wait for it to be uploaded to dropbox.
Congratulations! Now your private data is “in the cloud”, but readable only by you, with the passphrase you setup for your private file container.