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Overview of Digital Signatures

Overview of Digital Signatures. Introduction To Networks and Communications (CS 555 ) Presented by Raghav Sai Cheedalla. What is a D igital Signature?. An electronic signature that can be used to authenticate the identity of the sender of a message or the signer of a document.

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Overview of Digital Signatures

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  1. Overview of Digital Signatures Introduction To Networks and Communications (CS 555) Presented by Raghav Sai Cheedalla

  2. What is a Digital Signature? An electronic signature that can be used to authenticate the identity of the sender of a message or the signer of a document.

  3. Why Digital Signatures? • Authenticity • Non-Repudiation • Integrity to electronic documents To use internet as the safe and secure medium for e-Commerce and e-Governance

  4. How it works? Step 1: Getting a Private and Public Key Step 2: Signing an Electronic Document • Initiate the signing process  • Create a digital signature • Append the signature to the document

  5. How it works? Step 3:Validating a Digital Signature (Receiver Side) Initiate the validation process Decrypt the digital signature Compares the document fingerprint with the calculated one

  6. What is a Digital Certificate and who issues it? Adigital certificate is an electronic document that uses a digital signature to bind together a public key with an identity. The CA issues an encrypted digital certificate containing the sender’s public key and a variety of other identification information.

  7. Message Digest Data to be encoded -> Message Hash value(Message)->Message Digest or Digest Hash Functions • MD4 • MD5 • SHA-1 • SHA-2are generally used

  8. Uses of Digital Signature and Overall Function Authentication Integrity Non-repudiation

  9. References • http://en.wikipedia.org/wiki/Cryptographic_hash_function • http://www.authorstream.com/Presentation/aSGuest41865-360870-digital-signature-ccapresentation-1-science-technology-ppt-powerpoint/ • http://www.arx.com/digital-signatures-faq/ • http://en.wikipedia.org/wiki/Digital_signature • https://www.tcs-ca.tcs.com/images/DigitalSignature.jpg • http://www.webopedia.com/TERM/D/digital_certificate.html • http://tbibistel.files.wordpress.com/2011/05/ag_digital_certificate_operation_low_res.jpg

  10. Thank You

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