Appeal 2007-0930
Application 10/014,763
1 is used to sign the message sent from the HLR/AUC unit to the LPLMN and
2 the mobile station. The key Ki is kept secret in that it is not transmitted over
3 the air but stored in the HLR/AUC and another copy in the mobile unit’s
4 subscriber identity module. See Aura (Col. 2, ll. 11-18). Thus we find
5 ample evidence to support the Examiner’s rejection of claims 6, 7, 9, and 10.
6 Claim 17.
7 On pages 9 and 10 of the Brief, Appellants argue that the rejection of
8 claim 17 is in error for the reasons asserted with respect to claim 1 and
9 because claim 17 recites the waiting a predetermined delay between
10 checking that the first signature is valid and sending the second signature.
11 This argument has persuaded us of error in the Examiner’s rejection of claim
12 3.
13 As discussed supra, in Aura the second signature is sent in response to
14 the determination of the validity of the first signature. While there may be
15 some inherent minimal delay in the performance of this step we do not find
16 that it is of a predetermined amount of time. As we do not find that Aura
17 discloses all of the limitations of claim 17, we will not sustain the
18 Examiner’s rejection of claim 17.
19 Analysis relating to third issue.
20 The Examiner’s rejection of claims 8, 11 through 16, and 18 on page
21 9 of the Answer states:
22 It would have been obvious to one having ordinary skill in the art, at
23 the time the invention was made, to combine the features of
24 verification digitat [sic] signature using the public key as per teaching
25 of Micali in to the method verification as taught by Aura, in order to
26 enhances the security and efficiency of known signature schemes.[See
27 Micali Column 1, lines 7-9].
28
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