Appeal No. 2006-3120
Application No. 09/944,695
(2) prints the image based on the print data.
[Mazzagatte, Fig. 7A, steps S702-S712; col. 10, line 41 – col. 11, line 22;
emphasis added].
As indicated above, the print data is encrypted with the symmetric key that
is, in turn, encrypted with the print node’s public key. Although the print node’s
public key encrypts the symmetric key that, in turn, encrypts the print data, the
public key nonetheless encrypts the print data -- albeit indirectly. That is, the
documents are encrypted by the print node’s public key via the encrypted
symmetric key.
Likewise, although the print node’s private key decrypts the symmetric key
that, in turn, decrypts the print data, the corresponding private key nonetheless
decrypts the print data -- albeit indirectly. That is, the private key decrypts the
print data via decrypting the symmetric key.
We further note the embodiment of Fig. 8 (print node is a gateway). In
that embodiment, after authenticating the intended recipient, the print node:
(1) obtains the encrypted symmetric key;
(2) retrieves the encrypted print data;
(3) decrypts the symmetric key with its public key;
(4) re-encrypts the symmetric key with the printer’s public key; and
(5) transmits the encrypted print data and encrypted symmetric key to the
printer;
Following these steps, the printer:
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