1. PRESENTED BY:
ANKITA DAVE
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2. SR.NO. TOPIC SLIDE NO.
1. WHAT IS DIGITAL SIGNATURES? 4
2. WHY DIGITAL SIGNATURES? 5
3. PAPER SIGNATURES VS DIGITAL SIGNATURES 6
4. PRIVATE KEY & PUBLIC KEY 7
5. PROTECTION OF PRIVATE KEY 8
6. WHAT IS DIGITAL SIGNATURE CERTIFICATE (DSC)? 9
7. CERTIFICATION AUTHORITY (CA) 10
8. HOW DOES DIGITAL SIGNATURES WORKS? 11
9. PROCEDURE TO OBTAIN DSC 12
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3. SR.NO. TOPIC SLIDE NO.
10. STEP 1: DOWNLOADING ROOT CERTIFICATE 13
11. STEP 2: SELECTING A CERTIFYING AUTHORITY 18
12. STEP 3: VISIT THE WEBSITE OF THE CA 19
13. CLASS- 1 CERTIFICATES 20
14. CLASS- 2 CERTIFICATES 21
15. CLASS- 3 CERTIFICATES 22
16. STEP 4: SELECT THE TYPE OF CERTIFICATE NEEDED 23
17. STEP 5: SUBMIT AN ONLINE REQUEST 24
18. CONCLUSION 29
19. SOURCES OF INFORMATION 30
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4.  As per Information Technology
Act 2000, digital signature
means authentication of any
electronic record by means of
an electronic.
 Simply, signature in digital form
OR
Mark to authenticate a
document.
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5.  Authentification.
 Integrity.
 Low cost.
 Eliminates the use of paper.
 Faster procedures.
 Completely secure.
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6. PARAMETER PAPER DIGITAL
Authenticity May be forged Can not be copied
Integrity Signature Signature depends
independent of on the contents of
the document the document
Non-repudiation a. Handwriting a. Any computer
expert needed user
b. Error prone b. Error free
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7. Each individual generates his own key pair.
PRIVATE KEY PUBLIC KEY
Known only to Known to
owner everyone
Used for making Used to verify
digital signature digital signature
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8. The private key generated is to be protected &
kept in secret because
 Can be misused by anyone who is having
access to your computer system.
 Is lost if computer system is formatted or
internet explorer is changed.
 The key is secured using
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9. Is an electronic means of establishing records
when doing transactions on the Internet.
Are easily transportable and cannot be imitated.
Contains details like owner’s name & public
key, expiration date of public, serial number &
name of the issuer (the Certification Authority) &
his digital signature.
It is issued so that Recipient can verify that the
certificate is authentic.
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10. SR. NO. NAMES OF CA WEBSITES
1. NIC nicca.nic.in
2. GNFC www.ncodesolutions.com
3. SAFESCRYPT www.safescrypt.com
4. TCS www.tcs-ca.tcs.co.in
5. MTNL TRUSTLINE www.mtnltrustline.com
6. IDRBT www.idrbtca.org.in
7. E-MUDHRA www.e-Mudhra.com
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11. 11

12. DOWNLOADING ROOT CERTIFICATE
SELECTING A CERTIFYING AUTHORITY
VISIT THE WEBSITE OF CERTIFYING AUTHORITY
SELECT THE TYPE OF CERTIFICATE NEEDED
SUBMIT AN ONLINE REQUEST
12

13. Visit the website of the Controller of Certifying
Authorities (CCA) at www.cca.gov.in.
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14. 14

15. 15

16. 16

17. 17

18.  Visit the website of the CCA at www.cca.gov.in
to obtain a list of licensed Certifying Authorities
in India.
 Based on information and study of the relevant
websites, select a Certifying Authority.
Example: TCS official website is
www.tcs-ca.tcs.co.in.
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19. A visit to the select CA website provides
following three types of digital signature
certificates:
CLASSES OF DSC:
 Class-1 certificates
 Class-2 certificates
 Class-3 certificates.
19

20.  These Certificates are personal e-mail
Certificates that allows you to secure your email
messages. These certificates can be used to:
1. Digitally sign email.
2. Encrypt email.
3. Authenticate to Web Servers.
 These certificates, however, do not facilitate
strong authentication of the identity of the
subscriber and hence, cannot be relied upon
where proof of identity is required (commercial
use). 20

21.  These Certificates are issued as Managed Digital
Certificates to employees/ partners/ affiliates/
customers of business and government
organizations that are ready to assume the
responsibility of verifying the accuracy of the
information submitted by their employees/
partners/ affiliates/ customers.
 These certificates issued under the TCS-CA Trust
Network are legally valid under the Indian IT Act
2000.
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22.  These Certificates are issued to individuals,
companies and government organizations.
 They can be used both for personal and
commercial purposes.
 They are typically used for electronic commerce
applications where security is a major concern.
 These Certificates issued by the TCS-CA are
legally valid under Indian IT Act 2000.
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23. We need a legally valid digital signature
certificate for an individual. The relevant
certificate is a class-3 certificate.
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24. The next step is to create a user account on the
TCS CA website, complete an online enrollment
form and generate a cryptographic key pair on
our computer.
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25. 25

26. 26

27. 27

28. 28

29. Hence, we can conclude that digital signatures:
Minimizes the risk of dealing with imposters.
Minimizes the risk of undetected message
tampering and forgery.
Retains a high degree of information security.
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30. asclonline.com/images/d/d4/Simple_Guide_to_
Digital_Signatures.pdf
www.youdzone.com/signature.html
en.wikipedia.org/wiki/Digital_signatures
www.cca.gov.in
esolutions.net.in/digitalsignatures.html
nsdl.co.in/business/cirRec_18Mar08.doc
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