EDI over Internet

1
EDI over Internet

• Rong Shi

2
Electronic Data Interchange

• Computer-to-computer exchange of business
  documents such as
• Request for quotations
• Purchase orders
• Invoices
• Ship notices
• Electronic funds transfer

3
EDI can ...

• Reduce paperwork
• Lower inventory
• Facilitate just in time production
• Decrease lead time
• Improve cash flow
• Increase productivity
• Eliminate mail time
• Reduce date entry

4
Key Terms

• Value added network(VAN) Electronic post office
• Transaction sets The electronic equivalent of
  paper forms
• Trading partner A company that shares the same
  values for continuous improvement, quality, and
  profitability through the use of EDI

5
Whats needed?

• Software
• - Translator
• - Application Interface Program
• Communication
• - VAN
• - Internet
• Standard
• - ANSI X12
• - UN/EDIFACT
• Hardware

6
Why Internet?

• Direct connection, real-time transaction
• Less expensive
• Ubiquitous network coverage
• Widely available public software
• total control and accountability

7
Java Based EDI over Internet
EDI Publisher

Web Client
Web Server
EDI Applet
EDI Server
DB
DB
Client Side
Server Side
8
Challenge and Requirement forEDI over Internet

• Authentication
• Authorization
• Access control
• Confidentiality
• Data integrity
• Non-repudiation

9
Secure EDI over Internet

• Authentication
• 1. ClientServer Request
• 2. ServerClient Ecpublickey(challenge)
• 3. Client?Server Dcprivatekey(challenge)
• Client Sends EDI Message
• 1. Sign Hash(message)gtdigest
  Ecprivatekey(digest)
• 2. Seal Esymmetrickey(message)Espublickey(Sy
  mmetric Key)
• 3. Send
• Server Receives EDI Message
• 1. accept
• 2. Open Dsprivatekey(Symmetric Key)
  Dsymmetrickey(message)
• 3. Verify Dcpublickey(digest) ?
  Rehash(message)

10
Future Work

• Dynamic Web-based applications
• CORBA compatible