PPT ON DIGITAL SIGNATURE

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Digital Signatures  Presentation Transcript

1.Digital Signatures

2.Public Key Infrastructure
Meeting legal Requirement
 -Privacy: Only intended recipient can read the files
-Integrity: Guarantees files are unaltered during                           
 transmission
-Authentication: Ensures that parties involved are  
 who they claim to be  -Non-repudation: Prevents individuals from denying
involvement in a transaction.

3.PKI Applications
E-mail with customers, partners and Employees
e-Commerce including data exchange and financial transactions.
Digital contract including loans, leases and Mortgages.
Remote Access to corporate databases.

4.The components of PKI
Encryption using Public Key & secret key
-Hybrid Approach
Digital Signature Process
Transporting Encryption Keys
Digital Certificates
Message Decryption and Verification

5.X.509 Digital Certificate

6.The Certification Process
Subscriber applies to CA for Digital Certificates.
CA Verifies the subscriber’s identity and issues digital certificates.
CA publishes certificates to public on-line repository
Subscriber signs message with private key & sends message to second party.
Receiving party verifies digital signature with sender’s public key.
CA reports status of subscriber’ certificates.

7.Digital Signature Process Illustrated

8.The Encryption Process

9.Message Decryption and Verification Process

10.Authentication MethodsSmart card VS Token-iKey VS smart card
Biometrics-Finger prints, voice print, Iris patterns, face print
Wireless -Pagers, Cell phones, PDA