This document discusses digital signatures and their creation and verification using Adobe Acrobat. It defines what a digital signature certificate is and its importance for online transactions. It then explains the digital signature standard and how to create and verify a digital signature in Adobe Acrobat. Alternative digital signature software are also listed. Advantages of digital signatures include flexibility and unlimited space, while disadvantages include initial high costs and need for expertise. Digital signatures have forensic significance for authentication and validating no modification to documents.

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

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

3. A digital certificate or a digital signature
certificate(DSC) is a digital record of credentials of
an individual or an organization. It verifies the
ingenuity of an entity involved in an online
transaction. DSCs come in handy during online
transactions including e-filing of income tax return,
e-tendering, online monetary transactions etc. over
the internet. They are also used during exchange of
confidential information through emails to ensure
security and originality of the information as well as
its sender
Digital Signature Certificate

4. Digital Signature Standard
• Digital Signature Standard (DSS) is the digital
signature algorithm (DSA) developed by the U.S. National Security
Agency (NSA) to generate a digital signature for
the authentication of electronic documents. DSS was put forth by the
National Institute of Standards and Technology (NIST) in 1994, and
has become the United States government standard for
authentication of electronic documents. DSS is specified in Federal
Information Processing Standard (FIPS) 186.

5. Creation of digital signature using
Adobe Acrobat
1) Open the pdf you want to
sign with the help of Adobe
Acrobat PDF Reader
2) Click on the tool menu on
the extreme upper left
corner
3) Select on Fill and Sign
4) Drag with mouse on the
desirable place on the pdf
where you want to place
your signature, the text here
menu will pop up
5) you can either write or draw
your signature
6) Once you have digitally sign
your pdf save it on the
desired location with desired
name

6. Creation of digital signature using
Adobe Acrobat

7. Verification of digital signature using
Adobe Acrobat
1) Open the digitally signed pdf with adobe
acrobat pdf reader
2) Click on the sign you want to validate,
the dialogue box will popup on the
desktop
3) It will explain whether the signature is
valid or not
4) You can click on signature properties to
check the properties of the digital
signature
5) You can click on the certificate menu to
check the details of the signer.

8. Alternative Software for digital signature
• Signrequest
• Hellosign
• SkySignature
• E-lock
• 4identity
• Corporate Signer
• Countasign
• Digusign
• OPENTRUST SPI
• PDF Autosigner
• PleaseSign
• Shuttle

9. Difference between Digital Signature and Electronic
Signature

10. ADVANTAGES:-
A. Flexibility:- One of the greatest advantage of digital signature is its flexibility to
manipulate the images or content on the display unit, to meet your needs or that
of your clients.
B. Unlimited space:- Digital boards can allow huge displays due to the large space
they have technologically advance digital signature software also allows you to
place a large amount of content including messages and videos on them.

11. Disadvantages:-
The advantages greatly overshadow the disadvantages. Practically the only
disadvantages of using digital signature are the weak laws regarding cyber security
which might cause any unnecessary hassles in case of a court case and that both
parties have to purchase the certificates for the digital signature in order to use it
instead of the one party courier charge.
• Initial huge costs:- the initial costs of acquiring LCD and LED display signature
unit is quite huge. In addition, there are other additional costs such as repair,
maintenance and also upgrading costs.
• Need of expertise:- To operate the digital signature software you will need to have
some basic IT skills especially if you are interested in developing your own content.

12. Forensic significance
 Digital signature is used for the purpose of authentication.
 One can validate whether the signature is authenticate or not.
 It avoids third party interference in the document.
 There is a no chance of modification in the content of the digitally
signed document.
 valid Digital signature certificate assures that the sender|/ signer is
authentic.