Digital Signatures Certificate

Apr 12, 2025

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Digital Signatures Certificate

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Digital Signatures

Digital Signatures. Presented by Olga Shishenina. Outline. Cryptographic goals Message Authentication Codes (MACs) Digital signatures RSA digital signature Elliptic curve digital signature Comparison of ECDSA and RSA signature. Message authentication. Entity authentication.

1.08k views • 63 slides

Digital Signatures

Digital Signatures. Structure. Introduction Basics Elements of digital signatures Realisation in public authorities Conclusion. 1. Introduction. What is a Digital Signature?

535 views • 23 slides

Digital Signatures

Digital Signatures. Dan Fleck CS 469: Security Engineering. 1. These slides are modified with permission from Bill Young ( Univ of Texas). Digital Signatures. Suppose you write a (physical) check. What would you like to be true ? A check is a tangible object authorizing the transaction.

489 views • 19 slides

DIGITAL SIGNATURES

DIGITAL SIGNATURES . Fred Piper & Mert Özarar. Codes & Ciphers Ltd 12 Duncan Road Richmond Surrey TW9 2JD. Information Security Group Royal Holloway, University of London Egham, Surrey TW20 0EX. Outline. Brief Introduction to Cryptography Public Key Systems

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Digital Signatures

Digital Signatures. A Brief Overview by Tim Sigmon November, 2000. Digital Signatures. Legal concept of “signature” is very broad any mark made with the intention of authenticating the marked document Digital signatures are one of many types of electronic signatures

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Digital Signatures

National Informatics Centre. Digital Signatures. An electronic signature duly issued by the certifying authority that shows the authenticity of the person who is signing the e- document. eCourt Div. NIC-Hq, New Delhi. National Informatics Centre. Electronic Record.

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Digital Signatures

Digital Signatures. Very easy to make copies Very fast distribution Easy archiving and retrieval Copies are as good as original Easily modifiable Environmental Friendly . Electronic Record. Because of 4 & 5 together, these lack authenticity. Why Digital Signatures?.

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Digital Signatures

Digital Signatures. have looked at message authentication but does not address issues of lack of trust digital signatures provide the ability to: verify author, date & time of signature authenticate message contents be verified by third parties to resolve disputes

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Digital Signatures

Digital Signatures. CSIS 5857: Encoding and Encryption. Need for Digital Signature. Authentication Problem : How can recipient be sure that message was sent by particular person ?. “Give Darth a $10,000 raise -- Alice”. E. Masquerading as Alice. Digital Signatures.

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Digital Signatures

Digital Signatures. Written Signatures / Paper Documents. Provide “proof” of identification Legal basis – contracts, etc. Ceremonial – signing person knows when s/he enters a contract. But. Forgery Falsified ID Altered documents Insecure – couriers, agencies, secretaries. Therefore:.

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Digital Signatures

Digital Signatures. Digital Signatures are used to “Sign” messages to validate the source and integrity of the contents. AC10F1AB38. Digitized Written Signature??. Simply taking a digital picture of a written signature does not provide adequate security.

895 views • 62 slides

Digital Signatures

Digital Signatures. CCA Controller of Certifying Authorities Ministry of Communications & Information Technology. Electronic Record. Very easy to make copies Very fast distribution Easy archiving and retrieval Copies are as good as original Easily modifiable Environmental Friendly.

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Digital Signatures

Digital Signatures. CSSE 490 Computer Security Mark Ardis, Rose-Hulman Institute April 12, 2004. Digital Signature. Construct that authenticated origin, contents of message in a manner provable to a disinterested third party (“judge”)

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Digital Signatures

Digital Signatures. Outline. [1] Introduction [2] Security Requirements for Signature Schemes [3] The ElGamal Signature Scheme [4] Variants of the ElGamal Signature Scheme The Digital Signature Algorithm The Elliptic Curve DSA. [1] Introduction.

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DIGITAL SIGNATURES

DIGITAL SIGNATURES. “FROM THE LEGAL TO THE I.T. AND THE INTERNATIONAL FIELD”. Jinghua YAN Nargiz UMAYEVA Anthony LI Remy MAGNIER. AGENDA. Computer security field vs. legal field Signature and the law How digital signature technology works Comparison of digital vs. traditional signatures

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Digital Signatures

Digital Signatures. Slides by Kent Seamons and Tim van der Horst Last Updated: Oct 7 , 2013. Digital Signatures. Diagram illustrating how to sign a message Why do we use a one-way hash? How does a collision or second pre-image attack relate to this?. Digital Signatures.

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Digital Signatures

Digital Signatures. CSCI381 Fall 2005 GWU. Definition. P : set of plaintext S : set of signatures K : keyspace private function: sig k : P  S public function: ver K : P X S  {true, false} ver K (m, s) = true iff sig K (m) = s; else ver K (m, s) = false

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Digital Signatures

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Digital Signatures

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Digital Signatures

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Digital Signatures

Digital Signatures. Ajaykumar Poondla CSC 692. Objective. The goal is to present the idea of digital signatures and the two commonly used digital signature algorithms RSA Signature scheme Elgamal Signature scheme. Digital Signatures.

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