technology infrastructure for electronic commerce
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Technology Infrastructure for Electronic Commerce. Olga Gelbart [email protected] THE GEORGE WASHINGTON UNIVERSITY based on Prof. Lance Hoffman’s Lecture on Network Infrastructure for Electronic Commerce. Snapshots of the Electronic Commerce World. Yesterday - EDI - PowerPoint PPT PresentationTRANSCRIPT
Technology Infrastructure for Electronic Commerce
Olga Gelbart
[email protected] GEORGE WASHINGTON UNIVERSITY
based on Prof. Lance Hoffman’s Lecture on Network Infrastructure for Electronic Commerce
Snapshots of the Electronic Commerce World
Yesterday - EDI Today - getting our toes wet, what this course is
about Tomorrow - Metadata, machine understandable
information on the Web.– Catalog information– Intellectual property information– Endorsement Information– Privacy information– see www.w3c.org/pics and www.w3c.org/p3p
How Did We Get Here?
Before the Internet
– History of Commerce and Money
– Elements of payment systems The Start of the Internet
– Predecessor Networks
– Timeline of Significant Events The Internet Today
– What is the Internet?
– How Does the Internet Work?
– Differences from Original Net
– Differences from Traditional World Out There The Internet in the Future
What is the Internet? On October 24, 1995, the FNC unanimously passed a resolution defining
the term Internet. This definition was developed in consultation with members of the internet and intellectual property rights communities. RESOLUTION: The Federal Networking Council (FNC) agrees that the following language reflects our definition of the term "Internet". "Internet" refers to the global information system that -- (i) is logically linked together by a globally unique address space based on the Internet Protocol (IP) or its subsequent extensions/follow-ons; (ii) is able to support communications using the Transmission Control Protocol/Internet Protocol (TCP/IP) suite or its subsequent extensions/follow-ons, and/or other IP-compatible protocols; and (iii) provides, uses or makes accessible, either publicly or privately, high level services layered on the communications and related infrastructure described herein.
http://www.fnc.gov/Internet_res.html
The Internet - connections
•Computers in the backbone connected by a (T3) data connection (45 megabits/second)
•ISP hosts and other powerful computers connectusing (T1,Broadband) lines
•Leased lines (some businesses)•Modem dial-up connections •Cable modems•ADSL - Asymmetric Digital Subscriber Line
Internet features Originally ARPAnet
– MIT, MITRE, SRI, BBN– Distributed communications even with many
failure points– Dissimilar computers exchange info easily– Route around nonfunctioning parts– 4 sites: SRI, UCLA, UCSB, Univ of Utah
Hafner and Lyon, Where Wizards Stay Up Late, Simon & Schuster 1996
Kahn’s Internet PrinciplesR. Kahn, Communications Principles for Operating Systems. Internal BBN
memorandum, Jan. 1972.
Each network must stand on its own and no internal changes could be required to connect it to the Internet
If a transmission failed, try again Simple black boxes (later called
“gateways” and “routers” would connect the networks
No global control at operations level
The Internet - development1962 Licklider, J.C.R., Galactic Network memosLicklider - MIT to ARPAARPANET and successors: open architecture networking1970s: universities and other DoD contractors connect packets rather than circuits (note many of the names in the articles were graduate students then)1975: 100 sites and e-mail is changing how people collaborateLate 1970s: New Packet Switching Protocol:
Transfer Control Protocol/Internet Protocol (TCP/IP)1980: MILNET takes over military traffic1980s: NSFNet links together NSF researcgers, Internet protocols incorporated into (BSD) Unix, a widespread operating systemLate 1980s: NSFNet absorbs original ARPANET (for a US university to get NSF funding for an Internet connection, that connection had to be made available to all qualified users on campus, regardless of discipline1995: Commercial backbones replace NSFNet backboneUsenetBITNETCommercial Networks: AOL, Compuserve, etc.
Federal Decisions that Shaped the Internet
Agencies shared cost of common infrastructure, e.g., trans-oceanic circuits
CSNET/NSF (Farber) and ARPA (Kahn) shared infrastructure without metering
Acceptable Use Policy - no commercialization. Privately funded augmentation for commercial uses (PSI, UUNET, etc.), thought about as early as 1988 KSG conferences sponsored by NSF
NSF defunded NSF backbone in 1995, redistributing funds to regional networks to buy from now-numerous, private, long-haul networks
NSFNet $200M from 1986-1995
The Internet - Four AspectsLeiner, et al., “A Brief History of the Internet”,
http://info.isoc.org/internet/history/brief.html Technological Evolution
– Packet Switching– Scale, Performance, Functionality
Operations and management of a global and complex infrastructure
Social Aspect - Internauts Commercialization
Internet Development Timeline
From “A Brief History of the Internet” by B. Leiner, et al.,http://info.isoc.org/internet/history/brief.html
Excerpts from Hobbes’ Internet Timelineby Robert H. Zakonhttp://www.info.isoc.org/guest/zakon/Internet/History/HIT.html
1957 Sputnik; US forms ARPA 1962 P Baran, Rand, “On Distributed Communications Networks”, packet switched networks 1967 Larry Roberts first design paper on ARPAnet 1969 ARPANet commissioned. First RFC. 1970 ALOHANet (radio) connected to ARPANet in 1972 1971 Ray Tomlinson E-mail, BBN 1972 Telnet specification (RFC 318) 1973 File transfer specification (RFC 454) 1977 Mail specification (RFC 733) 1979 USENet newsgroups. First MUD. 1981 CSNet 1982 DoD standardizes on TCP/IP 1983 Name server developed at University of Wisconsin; users no longer need to remember exact path to other systems 1983 Berkeley releases 4.2BSD including TCP/IP 1984 DNS introduced. Now over 1,000 hosts 1984 Moderated newsgroups on USENET 1988 Internet worm affects 6,000 of the 60,000 Internet hosts 1990 EFF founded by Mitch Kapor 1991 WWW released by CERN (Tim Berners-Lee, developer) 1991 PGP released by Phil Zimmerman 1992 ISOC chartered 1992 “Surfing the Internet” coined by Jean Armour Polly 1993 US White House goes online 1993 Internet Talk Radio 1994 Can now order pizza from Pizza Hut online 1994 First Virtual bank open for business 1995 RealAudio 1995 Netscape third largest ever NASDAQ IPO share value 1995 Registration of domain names no longer free 1996 Communications Decency Act passed, challenged in US 1997 CDA overturned by Supreme Court
Growth of the InternetFrom Hobbes’ Internet Timeline at http://info.isoc.org. ...
How Internet Manages Change?
RFC process W3C process Now a proliferation of stakeholders Debates over control of name space Profits to be made and lost Commercial vs. Other interests
Trends in Internet Applications
Internet TV (Web TV + VIATV Videophone)
Voice over IP (VoIP) Internet telephone Internet dashboard (Alpine GPS,
Windows CE in cars) Wireless (WAP)
Needed in Electronic Commerce
Authentication Privacy Message Integrity Non-repudiation
Adapted from Gail Grant
Authentication
Proving identity– Passports– Driver’s licenses– Credit Cards– Doctors’ diplomas
Gail Grant
Privacy
Locks Doors Perimeter security Castles
Gail Grant
MYTH
REALITY
Gail Grant
Message Integrity
Wax seals Tylenol seals Custom seals US Mail
Gail Grant
Non-Repudiation
Handshake Notary Public Signatures Contacts
Electronic cash policy issues
anonymity– can lead to “perfect” crime
traceability (accountability) security (no electronic muggings)
Certification Authority Functions Accept applications for certificates
Verify the identity of the person or organization applying for the certificate
Issue certificates
Revoke/Expire certificates
Provide status information about the certificates that it has issued
But what do the certificates mean?
Adapted from Gail Grant
Gail Grant
Who Will Be CA’s? Specialty firms (VeriSign) Government agencies Corporations (for employees) Telecommunication companies Banks Internet Service Providers Value-Added Networks (VAN’s) Whom to trust?
– Hierarchy vs web of trust
July 1997
Who Sells CA Products and Services?
Atalla Corporation
BBN Corporation
CertCo
Cylink Corporation
Entrust Technologies Inc.
GTE Corporation
IBM
Netscape Communications
VeriSign
Xcert Software Inc.
Gail Grant
Legal Issues
Legislation Responsibilities Liability International Usage Certification Practice Statements
Business Issues for CAs
Business Models Risks Costs In-House vs Out-Sourcing Operational Considerations Liability
Some Problems
Untrusted computer systems Not all persons are trustable Law not clear Policy not clear Sovereignty challenged:
– Cryptography policy• Anonymity• Confidentiality
Untrusted Computer Systems (then)Malware Example: The Internet Worm
Shut down 6,000 machines, Nov 1988
– Tried three techniques in parallel to spread
• Guess passwords
• Exploit a bug in the finger program
• Use a trapdoor in the sendmail program
– Effects
• serious degradation in performance of affected machines
• affected machines had to be shut down or disconnected from the internet
– Criminal justice • Perpetrator convicted January 1990 under 1986
Computer Fraud and Abuse Act; sentenced to3 years probation, $10,000 fine, and 400 hours of community service
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Web-Based Computer Systems SURPRISE DISCLOSURES OF PERSONAL
INFORMATION, AND PROGRAM LAUNCHES Cookies JAVA (Applet security issues) Microsoft
– Word macro viruses– ACTIVE-X
• QUICKEN surprise bank transfer
– Web-based viruses Browser vulnerabilities (recent Netscape 4.x -- have
to disable Java!) A final surprise: monitoring tools (e.g.,
SATAN) also used by the enemy
Who are “trustworthy” persons?
With “everyone” connected by networks, how do you know who to trust?
Trusted Third Parties Certifying Authorities Digital Signatures
– Strong, Trustable Encryption Distributed Architecture: Smart Cards
LAW OF THE NET
Whose Law? Internet is not a monarchy, democracy, republic, or dictatorship; rules and formalities are nonexistent
Jurisdiction, treaties, harmonization of definitions– CDA Example, Tennessee
Enforcement
– Elected officials and their designees?
– Internet Service Providers?
– Vigilantes?
• Anti-spam page: http://www.dgl.com/docs/antispam.html
– Agents Launched by Any of the Above?
• Cancelbots
– Netiquette?
Sovereignty Case study: Cryptography Policy
Government stalling, an impediment to
progress, or cautious reasoning to avoid chaos?– Constitutional issues
- Law Enforcement- National Security
– Privacy issues– Export policies– Jurisdictional "turf" issues
18071
Issues in Cryptography PolicyPrivacy Issues
When should government have right tomonitor telecommunications?
What safeguards prevent abuse ofinformation obtained with taps?
Can a free society toleratehidden data with no accountability?
Encryption device
(adapted from White House briefing)Clipper Chip Solution (Clipper I)
Clipper Chip
Law Enforcement Agency
Court
Key Escrow Holders
WARRANT
1
2
* provides successor for DES* provides law enforcement solution
Commerce Dept., NISTTreasury Dept., Automated Systems Div
THE FOUR HORSEMEN OF THE APOCALYPSE
(CYPHERPUNKS VERSION)
nuclear terrorists child pornographers money launderers drug dealers
APPLICATION OF BLIND SIGNATURE TO A REAL CRIMEAPPLICATION OF BLIND SIGNATURE TO A REAL CRIMEB. von Solms and D. Naccache, B. von Solms and D. Naccache, Computers and Security 11Computers and Security 11, 6 (1992), 6 (1992)reprinted in Hoffman, L. (Ed.), reprinted in Hoffman, L. (Ed.), Building in Big BrotherBuilding in Big Brother,,Springer-Verlag, 1995Springer-Verlag, 1995
WHAT IF UNBREAKABLE ENCRYPTION LEADS TO THIS?
How many times per year is acceptable?
19111
NAS/NRC CRYPTO POLICY REPORT HIGHLIGHTS
Commercial use: Should promote widespreadcommercial use of technologies that canprevent unauthorized access to electronic info
Exportation: Should allow export of DES toprovide an acceptable level of security
Escrow: Premature (Key recovery = current proposal)
Classified material: The debate on cryptopolicy should be open and does not requireknowledge of classified material
Total preliminary report at http://www.nap.edu/nap/online/titleindex.html#c Cryptography's Role in Securing the Information Society, 1996,National Academy Press, 2101 Constitution Ave. NW, Box 285, Washington DC 20055, (800) 624-6242
1989219892
CURRENT ENCRYPTION LEGISLATION
Highlights: Full Text at http://www.cdt.org/crypto/
SAFE (HR 695)
Reps. Goodlatte (R-VA), Eshoo (D-CA) Pro-CODE (S 377)
– Sen. Leahy (D-VT), Burns (R-CO), Wyden (D-OR)
– Audio and photo transcript and lots of information
from 3/19/97 hearing at
www.democracy.net/archive/03191997 Commonalities between SAFE and Pro-CODE
– Prohibit government from imposing mandatory key escrow
– No export license required for public domain or
– generally available encryption software (Draft Clinton administration legislation [no warrant])
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Building a Home Page to Sell Something Just Building a Home Page Now Making It Sell Something What to Sell?