Public key/signature cryptosystem with enhanced digital signature certification

A'S PUBLIC KEY

A'S NAME
TITLE
ADDRESS
TELEPHONE #
COMMENT BY "BN
EXPIRATION DATE

ACCOUNT #
MONETARY LIMIT
CANCELLATION POWER

TRUST LEVEL
SECURITY LEVEL

CO-SIGNATURE
REQUIREMENTS

—* MINIMUM # 9 LIST
OF JOINT-SIGNER'S
PUBLIC KEY. HAS A'S
REQUIREMENTS

—MINIMUM tt 8i LIST
OF COUNTER-SIGNER'S
CERTIFICATE. HAS A$
REQUIREMENTS

B'S PUBLIC KEY
(PRIMARY SPONSOR)

OTHER ALLOWED SIGNERS, IF ANY

116

CERTIFICATE > PACKET

SIGNATURE PACKET FOR B'S SIGNATURE TO A'S NEW CERTIFICATE

To: John Haberford, Universal Widgett Corporation

From: Bob Blakely, Hattersfield Marine Builders

Date: 14 July 1988, 10:26 am EDT

Subj: Widgets received

Dear John,

We received the July 12 Shipment of widgets, and found only
one item of damage, namely a nick in the paint of widget number
#4688219-A3367.

Thanks.

Digital Signature:
Signature Date: 14 Jul 1988, 10:34 am EDT
Signature & Seal:

65263317 9E035673 CAA32E6F B21988C8 0ED113F6 571B060B B1B88EEE DCE1F1B7
4DB488A8 801CE95B 30F289EC EADBFD96 C831772D 5895D945 E2E7E5AC CD510CFC
C8CF370C 2F87AB01 5638DD0F 3FBA3D7C A1583BF1 147C4477 060D28F7 3921F90E
F8EA6F90 75DA4EDF FACCBE05 A62D41E1 6B34789E 35CE84CF 0ED7DF91 35713371

Summary of Certificate governing digital signature:
Certif ID: FB8FD88F B9BDC829 82D8C468 37619831
Certif Date: 01/23/88 04:00 pm EST
Authorized Money Limit: 5000 $US
Id of certified:

Robert J- Blakely

Production General Manager

Hattersfield Marine Builders

Naples, Florida 33942