They are all the same. They are all both good and bad. If you thought your CC was safe at Target or Home Depot you have recently been surprised.
I consider e-mail an open form of communications much like my phone line or cell phone.
If you are concerned about security you need to look into secure communications which are either going to involve VPN connections or HTTPS setups. Depending upon what you are hoping to secure, the Government will still have full access to all of these communications should they choose to take that option.
For banking and other secure activities, you are already secure as long as you ensure that you see the "closed padlock" and/or an HTTPS (the S is critical) in the web address.
