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Digital signature


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Digital signature

  1. 1. Digital Signature Presentation By: Yash .A. Karanke BCA-3rd Semester
  2. 2. Part 1 : Brief Explanation
  3. 3. Introduction….. • A digital signature is a mathematical scheme for demonstrating the authenticity of a digital message or document. • A valid digital signature gives a recipient reason to believe that the message was created by a known sender, such that the sender cannot deny having sent the message and that the message was not altered in transit.
  4. 4. Diagram showing how Digital Signature works.
  5. 5. How Digital Signature Works in Real world? • Ajay has been given two keys. One of Ajay’s keys is called a Public Key, the other is called a Private Key. • Ajay’s Public key is available to anyone who needs it, but he keeps his Private Key to himself. • Keys are used to encrypt information. • Encrypting information means "scrambling it up", so that only a person with the appropriate key can make it readable again.
  6. 6. History of Digital Signature • In 1976, Whitfield Diffie and Martin Hellman first described the notion of a digital signature scheme, but the information was incomplete. • Soon afterwards, Ronald Rivest, Adi Shamir, and Len Adleman invented the RSA(Rivest-Shamir-Adleman) algorithm, which could be used to produce primitive digital signatures.(plain RSA signatures are not secure). • The first widely marketed software package to offer digital signature was Lotus Notes 1.0, released in 1989, which used the RSA algorithm. • In 1988, Shafi Goldwasser, Silvio Micali, and Ronald Rivest became the first to rigorously define the security requirements of digital signature schemes.
  7. 7. Applications of Digital Signature • Digital Signature can be used in following: • For sending and receiving digitally signed and encrypted emails. • For carrying out secure web-based transactions. • For signing documents like MSWord, MS Excel and PDFs.
  8. 8. What is Digital Signature ‘Certificate’ ? • Digital Signature Certificates (DSC) is the electronic format of physical or paper certificate like a driving License, passport etc. • Certificates serve as proof of identity of an individual for a certain purpose; for example, a Passport identifies someone as a citizen of that country; who can legally travel to any country. • A Digital Signature Certificate can be presented electronically to prove your identity, to access information or services on the Internet or to sign certain documents digitally.
  9. 9. How does Digital Signature Certificate work? • A Digital Signature Certificate explicitly associates the identity of an individual/device with a pair of electronic keys - public and private keys • The certificate contains information about a user's identity. • The private key is stored on the user's computer hard disk ; it can only be used with the issued password. • The public key is disseminated with the encrypted information. • The authentication process fails if either one of these keys in not available or do not match.
  10. 10. Example -1 Smart card • What is a Smart card? • A smart card is any pocket-sized card with embedded integrated circuits. • Smart cards can provide identification, authentication, data storage and application processing.
  11. 11. SmartcardDifferent color of smart card . Indicates , different types of Smartcards.
  12. 12. Smartcard This is another example of smartcards used in France for health insurance.
  13. 13. Digital Signature in India • Hence, the world is global village, sharing information and doing transactions is much more easier. • Yes , according to IT Act of year 2000 , Digital Signatures and its applications are legalized in India. • This helps making their job done in real-time while they’re not physically not present.
  14. 14. Firms which provide Digital Signature
  15. 15. Need of Digital Signature. • A Digital Signature authenticates your identity electronically. • It also provides you with a high level of security for your online transactions by ensuring absolute privacy of the information exchanged using a Digital Signature Certificate. • You can use certificates to encrypt information such that only the intended recipient can read it.
  16. 16. Difference between Digital Signature and Digital Signature Certificate. • A digital signature is an electronic method of signing an electronic document whereas a Digital Signature Certificate is a computer based record that. • Identifies the Certifying Authority issuing it. • Has the name and other details that can identify the subscriber. • Contains the subscriber's public key. • Is valid for either one year or two years. • Is digitally signed by the Certifying Authority issuing it.
  17. 17. Influence of Digital Signature on ISO 9000 • ISO 9000 is a series of standards, developed and published by the International Organization for Standardization (ISO), that define, establish, and maintain an effective quality assurance system for manufacturing and service industries. • Hence, the technology advanced. Few firms which offers digital certificates also now offers ISO 9000 digitally , which saves the time management and increase the quality of the work.
  18. 18. Companies issuing Digital Signature
  19. 19. Part 2 FAQs
  20. 20.  1) Is it safe for any individual to use Digital Signature ?  Yes it is. Since it is highly encrypted system , only the individual who has been issued the Digital Signature can only use that Signature. FAQ
  21. 21.  2) Why is Digital Signature required?  Like physical documents are signed manually, electronic documents, for example e-forms are required to be signed digitally using a Digital Signature. FAQ
  22. 22.  3) Who issues the Digital Signature in India ?  A licensed Certifying Authority (CA) issues the digital signature. Certifying Authority (CA) means a person who has been granted a license to issue a digital signature certificate under Section 24 of the Indian IT-Act 2000. FAQ
  23. 23.  4) How much time do CAs take to issue a Digital Signature ?  The time taken by CAs to issue a Digital Signature may vary from three to seven days. FAQ
  24. 24.  5) For How long a Digital Signature or Digital Signature Certificate is valid ?  Generally , a Digital Signature is valid for 2 years after issuing date. FAQ
  25. 25.  6) What is the legal status of a Digital Signature?  Digital Signatures are legally admissible in a Court of Law, as provided under the provisions of IT Act. 2000 FAQ
  26. 26.  7) What is PKI?  PKI means Public Key Infrastructure  PKI provides each user with a pair of keys, a private key and a public key, used in every signed transaction. FAQ
  27. 27.  8) What are the environmental effects of switching to an electronic signature?  The average e-signature user signs just over 2 documents per workday, or 500 documents per year (based on CoSign customer usage statistics).  These numbers equal a usage reduction of half of a tree a year FAQ
  28. 28.  9) Can a digital signature be forged?  It is practically impossible to forge a digital signature.  It is secure and has be applied online for authentication.  Thus it is more secure than a hand-written signature. FAQ
  29. 29.  10) What are the different types of Digital Signature Certificates?  Class 1: These certificates do not hold any legal validity as the validation process is based only on a valid e-mail ID and involves no direct verification.  Class 2: Here, the identity of a person is verified against a trusted, pre-verified database.  Class 3: This is the highest level where the person needs to present himself or herself in front of a Registration Authority (RA) and prove his/ her identity. FAQ
  30. 30.  ISO Video ~  eMudra ~  DocuSign ~  Verisign ~ REFRENCES
  31. 31.  MCA-GOV (Ministry Of Corporation) ~ #q2  Digital ~  Digital Signature Gallery ~ digital-signature-india.html REFRENCES