DIGITAL SIGNATURESDIGITAL SIGNATURES

““FROM THE LEGALFROM THE LEGALTO THE I.T. AND THE TO THE I.T. AND THE

INTERNATIONAL INTERNATIONAL FIELD”FIELD” Jinghua YAN

Nargiz UMAYEVAAnthony LI

Remy MAGNIER

Jinghua YANNargiz UMAYEVA

Remy MAGNIER 12/08/00 Anthony LI

AGENDA

Computer security field vs. legal field

Signature and the law

How digital signature technology works

Comparison of digital vs. traditional signatures

Challenges and opportunities

Jinghua YANNargiz UMAYEVA

Remy MAGNIER 12/08/00 Anthony LI

COMPUTER SECURITY VS. LEGAL FIELD

The need for digital signature todayIT versus legal conceptAn effective digital signature is a

combination of both fieldsElectronic and digital signature

Jinghua YANNargiz UMAYEVA

Remy MAGNIER 12/08/00 Anthony LI

SIGNATURES & THE LAW

The general purposes of signing writingsEvidenceCeremonyApprovalEfficiency and logistics

Jinghua YANNargiz UMAYEVA

Remy MAGNIER 12/08/00 Anthony LI

SIGNATURES & THE LAW

An essential adaptation to the technologyFasterCheaper

The required attributes of a signatureSigner authenticationDocument authenticationAffirmative actEfficiency

Jinghua YANNargiz UMAYEVA

Remy MAGNIER 12/08/00 Anthony LI

HOW DIGITAL SIGNATURE TECHNOLOGY WORKS

The asymmetrical cryptosystem (private-public) key

The hash functionDigital Signature creationDigital Signature verification

Jinghua YANNargiz UMAYEVA

Remy MAGNIER 12/08/00 Anthony LI

HOW DIGITAL SIGNATURE TECHNOLOGY WORKS

Jinghua YANNargiz UMAYEVA

Remy MAGNIER 12/08/00 Anthony LI

The Certification

Authority

Jinghua YANNargiz UMAYEVA

Remy MAGNIER 12/08/00 Anthony LI

MORE FEATURES: ENCRYPTED MESSAGES

Document PublicKey

PrivateKey

Decrypteddocument

From thesender

To the receiver

Encrypteddocument

Encrypteddocument

Come from acertification authority

Jinghua YANNargiz UMAYEVA

Remy MAGNIER 12/08/00 Anthony LI

COMPARISON OF DIGITAL AND TRADITIONAL

AdvantagesData integritySigner authenticationMessage authenticationNon-repudiationTime stamp is criticalIncrease the speed of transactionsConfidentiality through encryption

Jinghua YANNargiz UMAYEVA

Remy MAGNIER 12/08/00 Anthony LI

COMPARISON OF DIGITAL AND TRADITIONAL

DisadvantagesTechnological compatibilitySecurity concernsLegal issues

Jinghua YANNargiz UMAYEVA

Remy MAGNIER 12/08/00 Anthony LI

CHALLENGES AND OPPORTUNITIES

Public key certificatesWho is represented by the key pair?The need of a third party

Impact on the business worldPerformanceCosts

Jinghua YANNargiz UMAYEVA

Remy MAGNIER 12/08/00 Anthony LI

CHALLENGES AND OPPORTUNITIES

Banking and financial services

Reduced paperwork; faster approvals

Increased velocity of fund transfersNew business opportunities to act as certification authoritiesSupport for the many different trading partners that may be involved in a financial transaction

Health care

Automation of claims and paymentsIntegration with insurance companies and provider networksSecure access to patient records

Cost of adoptionSpeed with which digital signature technology can be deployed

Jinghua YANNargiz UMAYEVA

Remy MAGNIER 12/08/00 Anthony LI

CHALLENGES AND OPPORTUNITIES

International OverviewUS: Federal vs. StateAsia: digital signature is driven by the

commercial sector, still a multi-tier development

Europe: EU directive as a starting point

Jinghua YANNargiz UMAYEVA

Remy MAGNIER 12/08/00 Anthony LI

CHALLENGES AND OPPORTUNITIES

The cost of digital signaturesInstitutional overheadSubscriber and relying party Costs

The promising solutionsImpostersMessage integrityFormal legal requirementsOpen systems

Jinghua YANNargiz UMAYEVA

Remy MAGNIER 12/08/00 Anthony LI

CHALLENGES AND OPPORTUNITIES

Today’s e-signature playersIluminSignOnlineLitronicInterlink Electronics

Sooner than later

ANYANYQUESTIONS ?QUESTIONS ?

Interlink Electronics

http://www.prism.gatech.edu/~gt6383c