1 An icsa white Paper

3.3.5 SET -- Authorization and Non-Repudiation 
The Secure Electronic Transactions (SET) protocol requires digital certificates for each use of a 
credit card by a user trying to pay a merchant48 
. MasterCard and Visa announced 
the SET standard in February 1996; SET is also supported by GTE, IBM, Microsoft, Netscape, 
43
Mapping The Rocky Road To Authentication. By Christy 
Hudgins-Bonafield. 
44  
Role of digital certificates looks secure: But 
roadblocks to use include no interoperability, too many issuing authorities. By Dave Kosiur. 
45  
Role of digital certificates looks secure: But 
roadblocks to use include no interoperability, too many issuing authorities. By Dave Kosiur. 
46 
Paper version: Hudgins-Bonafield, C. (1997). Mapping the 
rocky road to authentication. Network Computing 8(13):26 (Jul 15) 
47 
What's Holding Up E-Commerce? A survey 
says Web businesses still need security tools.
48  
Role of digital certificates looks secure: But 
roadblocks to use include no interoperability, too many issuing authorities. By Dave Kosiur. 

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IA&A on the WWW 
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Copyright © 1997 M. E. Kabay & ICSA. All rights reserved. Page 17 of 33
SAIC, Terisa, and VeriSign49 . 
SET-compliant sites protect merchants from unauthorized payments and repudiation by clients; 
banks using SET are protected against unauthorized purchases using their cards; and consumers 
are protected from merchant imposters and theft of credit card numbers50 
. Supporters say SET will allow 
consumers to relax about security on the Web51 
.