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E-Commerce Public Key Infrastructure Prepared By Imran Patel Preston University Table of Contents 1Introduction2 2Electronic Security Key Concepts2 3Common Security Risks3 4Common Safeguards3 5Cryptography4 6Key-based encryption4 7Digital Signatures4 8Digital Certificates for Authentication5 9Overview of Digital Certificates5 91Digital ID Usage6 92Subject Authentication6 93The X509 Certificate Format6 10Certificate Distribution7 11Maintaining Control of Certificate Management7 12Authentication Protocols7 13Passwords and PINs7 14Internet Messaging Security8 141MIME and SMIME8 142Secure Sockets Layer SSL8 143Secure HTTP S-HTTP9 15Electronic Commerce Application Security9 151Overview of EDI Security9 152The SET Protocol9 16Summary10 1 Introduction Electronic commerce is a strategic imperative for most competitive organizations today It is a key to finding new sources of revenue expanding into new markets reducing costs and creating breakaway business strategies Yet the risks of electronic commerce sometimes seem almost as large as the rewards The infrastructure that supports electronic commerce can be susceptible to abuse misuse and failure causing a number of business problems--including financial loss due to fraud lost business opportunities due to service disruption a tarnished reputation for service and loss of customer confidence Reports of attacks on computer networks or electronic services are abundant--from the 1995 hacking attack on Citibanks cash management system to the 1995 arrest of computer hacker Kevin Milnick to the series of hacker attacks on US military research facilities Independent estimates of the extent of electronic fraud are staggering For example Online information theft including pirated software stolen credit card numbers and unauthorized access to corporate secrets is estimated to be in excess of 10 billion annually in the US alone Nearly half of organizations suffered the consequences of an information-security-related financial loss in the last two years Credit card fraud is estimated at 5 billion annually It is clear that businesses that conduct electronic commerce must protect themselves It is not always clear how they should do so VeriSign Inc the worlds leading certification authority and
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