Creation & Verification of Digital Signature using Digisigner

Digital Singatute-
Basics of Digital Signature
Creation & Verification of Digital Signature using Digisigner
Steps of creation of digital signature using Digisigner
Steps of Validation of Digital signature using Digisigner
Working of Digital Signatgure
Attributes of Digital Signature
Digital signature ensures the confidentiality via. The following three attributes,
1 Authentication
2 Integrity
3 Non-repudiation
Controller of Certifying Authority(CCA)
Sections related to digital signature
Digisigner 4.0

1. Govt. Institute of Forensic Science, Nagpur Applied Digital & Cyber Forensics B.Sc. IIIrd year Sem.- Vth Academic Session:- 2018-19

2. Creation & Verification of Digital Signature using Digisigner Presented by, Rituja R. Gharote Mamta A. Barmase Palash A. Mehar

3. Digital Signature It is a type of electronic signature that encrypts documents with digital codes that are particularly difficult to duplicate. A digital signature is an authentication mechanism that enables the creator of message to attach a code that acts as a signature. The signature is formed by taking the hash of the message and encrypting the message with the creator’s private key . Digital signature cryptographically bind an electronic identity to an electronic document and the signature can not be copied to another document.

4. Working of Digital Signatgure Digital signatures, like handwritten signatures are unique to each signer. Digital signature solution providers such as Docusign , follow a specific protocol, called PKI. The digital signature can be considered as a numerical value that is represented as a sequence of characters. The creation of a digital signature is a complex mathematical process that can only be created by a computer.

5. Working of Digital Signatgure Consider a scenario where Alice has to digitally sign a file or an email and send it to bob. Alice selects the file to be digitally signed or click on the ‘sign in’ her email application. The hash value of the file content or the message is calculated by Alice’s computer. This hash value encrypted with Alice signing key (which is private key) to create the digital signature. Now the original file or email message along with its digital signature are sent to Bob. After Bob receives the sign message associated applications ( Email applications) identifies that the message has been signed, Bob’s computer then proceed to, Decrypt the digital signature using Alice’s public key Calculate the hash of original message Compare the (a) hash it has computed from the received message with the (b) decrypted hash received with Alice’s message.

6. Working of Digital Signatgure

7. Attributes of Digital Signature Digital signature ensures the confidentiality via. The following three attributes , Authentication Integrity Non-repudiation

8. Attributes of Digital Signature Authentication:- Authentication means the act of proving who you say you are. Authentication means that you know who created and sent the message. Digital signature is used to authenticate the source of message. It ensures the user of sender. Integrity:- Integrity ensures that when a message is sent over a network, the data that arrives is the same as the data that was originally sent. Integrity is the assurance that the information is trustworthy and accurate. Digital signature ensures the integrity of the message. Non-repudiation:- This is an important criteria of digital signature. As digital signature ensures the authentication of the message, so the sender can’t repudiate it later. At the same time it also ensures the identity of the receiver can’t repudiate it later.

9. Controller of Certifying Authority(CCA) The IT Act provides for the Controller of Certifying Authorities (CCA) to license and regulate the working of Certifying Authorities and also to ensure that none of the provisions of the Act are violated. The Certifying Authorities (CAs) issue Digital Signature Certificates(DSC) for electronic authentication of users. The Controller of Certifying Authorities (CCA) has been appointed by the Central Government under section 17 of the Act for purposes of the IT Act. The Office of the CCA came into existence on November 1, 2000. It aims at promoting the growth of E-Commerce and E- Governance through the wide use of digital signatures.

10. Sections related to digital signature Section 47A in The Indian Evidence Act, 1872 47A Opinion as to electronic signature when relevant When the Court has to form an opinion as to the    electronic signature of any person, the opinion of the Certifying Authority which has issued the   Electronic Signature Certificate is a relevant fact. Section 73A in The Indian Evidence Act, 1872 Proof as to verification of digital signature. In order to ascertain whether a digital signature is that of the person by whom it purports to have been affixed, the Court may direct73A.

11. Digisigner 4.0 Size :- 8.41 MB License:- Freeware Publisher:- Listed programs Released Date:- 2013/10/21 Operating system:- Windows 2000/XP/Vista/7/8/10

12. Features:- Audit trail Authentication Auto reminders Customized templates Document Analytics E-signature Mobile signature Multi-party signing Task progress tracking

13. Steps of creation of digital signature using Digisigner Open a pdf with a Digisigner . Once the pdf is open, select on signature menu. Drag the mouse wherever you want to place your sign, Right click on mouse Either you can use default signature or you can generate your own signature by using the option generate your own certificate. Fill your necessary information like name, email, organization’s unit, organization, two-letter country code etc. The destination of scoring the key obtained from digital signature should be document file only. Give suitable password and click on generate Once you have generated your own signaturem , you can sign any pdf file click on sign. Save it with desired name on desired destination.

14. Steps of Validation of Digital signature using Digisigner Open the pdf you want to validate with Digisigner Either right click on the signature you want to validate or select validate signature menu on the extreme right corner This will show whether the signature is valid or not Mamta Barmase Date: 25/07/18 ] Mamta Barmase Date: 25/07/18