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Internet Security Basics

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Bipin Jethwani
Bipin Jethwani
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Internet Security Basics
Symmetric Encryption
[object Object],[object Object],[object Object]
Alice Bob
[object Object],[object Object],[object Object]
PKI Encryption
 
Important: These forms the basis for all the internet security protocols.
Alice Bob
 
 
 
PKI Digital Signatures
 
Third PKI-Rule Satisfied.
 
 
First & Third PKI Rule Satisfied. Unique sequence number is used inside the Digital Signatures to prevent interception and replay of the messages.
 
 
Certificates and Certificate Authorities
 
Here’s a trust relationship between a customer, his bank and his credit card company. When he drops a cheque at his bank to pay-off his credit card bill, he is assured that his credit card will be paid.
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
 
 
Carries Bobs Distinguished Name (DN) and his Public Key with other details. CA will do a lot of physical validations and issue a certificate to Bob. Normally Bob gets that either through email or CA requests him to download it from their web site.
 
You can store the certificate on your file system as a file (.cer), right click and check the properties. You can check the CAs and trusted parties certificates installed on your browser. Internet Explorer > Tools > Internet Options > Content > Certificates (button)
X.509 v3 Structure of a certificate ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Certificate filename extensions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],PeopleSoft uses PEM format.

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Internet Security Basics