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Sudev Barar writes:
> How can I show / prove that the copy of email shown by some one is not
> tampered with when compared to original email?

> Scenario - A sent an email to a B and D. B has tampered with the text
> of email and forwarded to C. C comes to D with a print copy of email
> from B. How can D show C that the original email by A and forwarded
> email by C are modified. D has shown C the original from A but C is
> not convinced and is casting aspersion on A and D of showing tampered
> emails.

I don't think it is possible unless, domainkeys or something similar
authentication mechanism is in use && B has forwarded complete mail
(including all headers) to C, then you can compare the DomainKeys
headers (or other mechanism's stuff) in both the mails.

> In similar scenario how does pgp signed mail proves the case except
> show genuineness of senders signatures?

If message is tampered with, the signature verfication process will
fail.

HTH
- -- 
·-- ·- ···· ·--- ·- ···- ·- ·--·-· --· -- ·- ·· ·-·· ·-·-·- -·-· --- --
()  ascii ribbon campaign - against HTML e-mail 
/\  www.asciiribbon.org   - against proprietary attachments
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