How to use GPG with Gmail?

Question

I would like to read and write GPG encrypted mails within Gmail. I found FireGPG, but the support for Gmail has been discontinued (and I am using Google Chrome as a browser).

What is the most practical way to achieve this?

Answer 1

Unfortunately, there is currently no reasonable way to use GPG/PGP from within Gmail directly. The only two options are to encrypt the message manually from a client-side tool, pasting the result into Gmail when you're done, or to use a desktop mail client with GPG integration (such as Thunderbird + Enigmail) to send messages you need to be encrypted. Decrypting would likewise entail downloading the message from Google as raw source, running it through the desktop client to decrypt, and reading it there.

Answer 2

The best Google Chrome extension for this is: "Mymail-Crypt For Gmail"

The Decrypt and Encrypt buttons are well located and easy to use:

such as the managing interface, plus doesn't require you to have gpg installed in your computer.

Answer 3

Came across a very promising looking Chrome extension for sending and receiving GPG encrypted emails: mailvelope.

It supports a variety of webmail providers.

Answer 4

There is now an alpha-quality Chrome extension for using GPG in Gmail. I have not tried it, so I cannot vouch for it.

FYI "apps and extentions can not be added from this website" http://thinkst.com/tools/cr-gpg/

Answer 5

Why not simply mail through IMAP, and use your favourite desktop mail client? It's practical, but not a webapp however...

Answer 6

I came across GPG4browsers. It's possible to check a signed messages and I can import my private keys. Apart from that it's still in an early stage.

Answer 7

On Windows I just encrypt in VisualGPG and then copy/paste into Gmail (plaintext e-mail, of course). Not that convenient, but no too much of a hassle either, considering how often I actually use GnuPG.

Edit: and on Mac, GPGTools seems quite comprehensive.

Answer 8

I have just tried several times to use the manual GPGP encryption/decryption via Gmail and have failed.

I'm sending via Gmail to GPGP's email robot Adelle and receiving the encrypted reply. The following error occurs during decrypt: "Error in operation result: No valid UTF-8 at position 40".
I have done the same send/receive/decrypt using MS Outlook from work, and the entire process worked fine.

Thinking it's an issue with Gmail's output, I even selected Gmail's option "View Original Message" from Adelle. I then copy/pasted the Gmail "Original Message" content into the decrypt window, and I get the same error.
I'm using Gpgp's Gpg4win distribution, packaged with GnuPG v2.0.14. I created keys both of size RSA 2048 bits and RSA 3072 bits. Has anyone else had issues with this via Gmail? The toolchain appears to work fine using Outlook (despite much chagrin to using that tool).