1. Digital Signature Technologies & Applications Ed Jensen Fall 2013

2. The Signature Been around for centuries Used to establish authenticity of documents Loan documents Contracts Declaration of Independence

3. Digital Signature Digital Certificate “a document that gives the name of a true party, that true party’s public key, and other information: used in authentication.” (Panko 2013) Digital Signature “a calculation added to a plaintext message to authenticate it” (Panko 2013)

4. How it works Three Elements of a Digital Signature Keys Public Key Private Key Signature Signature Verification

5. How it works (cont) Key Generation Algorithm Public Key generated and stored Private Key generated and issued to user Signing Algorithm Signature Verification Algorithm

6. How it works (cont) Certification Authorities Accept applications Issue Certificates Maintain Certificate Status and other Data

7. How it works (cont) Role of Certification Authorities Verify Identity of applicant Ensure identity integrity Attest to identity of applicant

8. Uses Authentication Integrity Nonrepudiation

9. Risks Security Stolen or Mistaken Identities Computation Power

10. Benefits Enhance security Going Paperless Physical space Cost savings Economic Development

11. Legal Considerations Federal ESIGN Act of 2000 Legally Binding Contracts Liability of CA

12. Current Applications/Services

13. The Future Business transactions between individuals and government Government to government transactions

14. Summary We have a need to validate and authenticate electronic documents Digital Signatures can meet that need Risks (security, stolen identity, computation power) Benefits (enhance security, paperless, economic development) ESIGN Act of 2000 (legally binding contract, CA liability) The Future (individual to government, government to government)

15. Questions?