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| Digital Seal™ |
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RPost Digital Seal™ protection is a form of digital
signature. It provides the same kind of authentication
and non-repudiation as Public Key systems but without
the administrative overhead and infrastructure requirements
that burden such systems.
RPost Digital Seal™ protection lets the sender
electronically sign their e-mail so the receiver
or future recipient can verify the integrity and
authorship of that e-mail. The sender is
protected against hoaxes, misrepresentation or imposture. |
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The
Digital Seal™ protection proves, for as long
as the Digital Seal™ mark is associated with that
e-mail, who sent the e-mail and what the
original content was that they sent. This
works for all e-mail systems and is durable
- continues to work even after the e-mail is
forwarded from person to person.
Simple
to use: To add a Digital Seal™
protection, the
sender clicks on the Send (R)egistered™
button in the desktop e-mail program
(desktop installation) and then selects the
"Digital Seal™" service option.
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COMPARISON OF DIGITAL SEAL™ VS.
DIGITAL SIGNATURE
Digital Seal™ protection has several
key advantages over PKI Digital
Signatures
Universality
• The Digital Seal™ service requires no
recipient software to verify
validity. This means that Digital
Seal™
marks can be received and verified
on web mail systems where Digital
Signatures cannot.
• Digital Signatures require mail
client software to decrypt and
verify their validity.
Robustness
• Documents that have Digital Seal™
protection can be forwarded to any
recipient and the Digital Seal™ mark
still remains valid and can be
verified.
• Digital Signatures do not remain
valid when e-mail is forwarded.
Durability
• The original content and
attachments of the message can
always be regenerated from the
Digital
Seal™ service. Neither the RPost system nor
any other party stores any e-mail.
• The original message cannot be
regenerated if a Digital Signature
is found to be invalid.
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Digital Seal™ Authentication
Any recipient of
an e-mail with Digital Seal™ protection can verify
authorship and integrity of the body text and
attachments - and have the original regenerated - by
forwarding the e-mail with the Digital Seal™ mark,
with all attachments, to
verify@rpost.net. Again, RPostŪ does not
store any e-mail. |
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Common Questions:
How is this different from a PKI Digital
Signature?
The main differences between the RPost Digital Seal™
protection and the PKI Digital Signatures are the following.
With the RPost Digital Seal™ protection:
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Any future recipient (second,
third+) can verify origin, authorship, and
integrity, since Digitally Sealed e-mail can
be forwarded and maintains its verification
functionality. PKI Digital Signatures are
fragile - the first recipient can verify origin,
but if that e-mail is forwarded, the act of
forwarding breaks the signature. |
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Any recipient can regenerate the original
e-mail. With PKI Digital Signatures, one cannot
regenerate the original e-mail content. |
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The Digital Seal™ service works for all e-mail
systems (web mail, PINE, Terminal, etc.). PKI Digital Signatures require the recipient
to have a compatible e-mail program. |
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