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How can I ensure that my email and attachments sent through gmail are encrypted, and can not be accessed by others?

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encrypt text, paste in gmail, send. Else, encrypt, attach, send. – Sathya May 31 '11 at 11:07
You can't. How do you define access by others? Access by Google? People sniffing your internet connection? Non-encrypted messages will always be readable to somebody. If you want to guarantee that your message stays encrypted, encrypt it before sending it. – slhck May 31 '11 at 11:45

Use something like pgp or gpg to encrypt your content before sending- there is a very nice 'encrypt current window' option in pgp for this.

Of course this still doesn't hide the recipient, which may be an issue...

(Also consider migrating to

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