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What is. Digital Certificate It is an identity.

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Presentation on theme: "What is. Digital Certificate It is an identity."— Presentation transcript:

1 What is

2 Digital Certificate

3 It is an identity.

4 It is…

5 From webopedia An attachment to an electronic message used for security purposes. The most common use of a digital certificate is to verify that a user sending a message is who he or she claims to be, and to provide the receiver with the means to encode a reply. An individual wishing to send an encrypted message applies for a digital certificate from a Certificate Authority (CA). The CA issues an encrypted digital certificate containing the applicant's public key and a variety of other identification information. The CA makes its own public key readily available through print publicity or perhaps on the Internet.attachmentsecurityencryptedCertificate Authority (CA)public keyInternet The recipient of an encrypted message uses the CA's public key to decode the digital certificate attached to the message, verifies it as issued by the CA and then obtains the sender's public key and identification information held within the certificate. With this information, the recipient can send an encrypted reply. From A digital certificate is an electronic "credit card" that establishes your credentials when doing business or other transactions on the Web. It is issued by a certification authority (CA). It contains your name, a serial number, expiration dates, a copy of the certificate holder's public key (used for encrypting messages and digital signatures), and the digital signature of the certificate-issuing authority so that a recipient can verify that the certificate is real. Some digital certificates conform to a standard, X.509. Digital certificates can be kept in registries so that authenticating users can look up other users' public keys.CApublic keydigital signature Definitions

6 Mess

7 An electronic

8 ID card

9 for Identify

10 To Identify

11 You

12 What can

13 represent you?

14 Verbal..


16 ID card

17 Driving License

18 Signature

19 3

20 (1)

21 Uniqueness

22 (2)

23 Related to you

24 ID card


26 (3)

27 Authorities





32 Trust Party

33 Trust

34 Authorities

35 Internet

36 You

37 Verbal..


39 MSN




43 Trust …no more

44 E-commerce



47 Who are You

48 ?

49 Digital

50 ID card

51 Driving License


53 Digital Signature

54 Digital Certificate


56 End section [Background]

57 System

58 PKI

59 (Public Key Infrastructure)

60 Design

61 For identify

62 Digital Signature

63 Digital Certificate

64 How it works?

65 Sender...encrypt…send..his… signature and cert… server…CA confirms it.. receiver check…. the..…result…decrypt…get the message..etc.etc.etc…

66 Example

67 David

68 Juno

69 Junos Private Key

70 Lese piks S! C! lnestssos

71 Lets skip CS lessons !!

72 David


74 CA (Certificate Authority)


76 Third Trust Party

77 CK Company

78 certificate and a randomly generated data which has encrypted with his private key to the CA The CA will check the certificate with its database and use the public key to decrypt the data. The encrypted data act like a digital signature and can be thought of as evidence provided by the user. So if the certificate is true and the data is decrypted, the user then gets the authentication from the CA.

79 Old School

80 Public Private

81 However…

82 Efficiency

83 PKI

84 C 2

85 Server


87 End section [System]

88 Deeper…

89 Theory

90 1.

91 The encryption

92 What is

93 Public Private ?

94 Sorry.

95 Covered

96 End section [Theory]

97 Last Part


99 Certificate Authority

100 How to

101 Choose

102 That word again

103 Trust

104 - History

105 - Trustworthy

106 - Cost



109 End [Presentation]

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