How to e-mail file so that it can only be opened by a scific recipient?

[mcatest]

Is it possible to e-mail an .exe or .zip file so that only the recipient can unzip it & it cannot be sent from the recipient to a second recipient? I.e. the file cannot be re-sent from that person to another person.

SNIP

[nileshgr]

You need to encrypt the message using a key. You will have the public and private key and the recipent should have the public key. Only the recipent will be able to decrypt the message.

[mcatest]

You need to encrypt the message using a key. You will have the public and private key and the recipent should have the public key. Only the recipent will be able to decrypt the message.

Thanks. How would I actually do this?

[nileshgr]

http://www.dtek.chalmers.se/~d97jorn/pgp/

http://www.google.com/search?hl=en&q=email+encryption&sourceid=navclient-ff&rlz=1B5GGGL_enIN310IN310&ie=UTF-8

Google is your friend !