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Public Key Infrastructure PKI

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PKI and the Government of Canada. Some development stuff ... www.entrust.com. www.cse-cst.gc.ca/cse/english/gov.html. www.cio-dpi.gc.ca/pki/pki_index_e.html ... – PowerPoint PPT presentation

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Title: Public Key Infrastructure PKI


1
Public Key Infrastructure (PKI)
2
Introduction
  • What Public Key Infrastructure
  • Why GoCs architecture of choice
  • Where Many Government Depts (including DND)
  • When Coming soon (i.e., after Y2K)

3
Overview
  • Why PK Cryptography?
  • PKI Concepts
  • Advantages and disadvantages
  • Some terminology
  • PKI and the Government of Canada
  • Some development stuff
  • Where to find out more

4
Why PK Encryption ?
  • Basic e-commerce
  • Private e-mail
  • Workflow automation
  • Legally binding contracts

5
Symmetric cryptography
  • The old fashioned way

K
K
C
P
E
D
P
6
Symmetric cryptography
  • Hierarchical structure (e.g. military)

1
4
2
3
7
Symmetric cryptography
  • Network structure (e.g. commercial)

1
8
Public Key Cryptography
  • Overcomes the multiple keys problem by using 2
    asymmetric keys

KE
KD
C
P
P
D
E
9
Advantages of PK Cryptography
  • No need to distribute multiple key pairs
  • Each organization participating can administer
    its own keys

10
Disadvantages of PK Cryptography
  • Complex
  • More expensive than symmetrical keying
  • A document being distributed to multiple users
    must be encrypted multiple times

11
PK Cryptography--Offsetting the Disadvantages
  • Government and industry support and standards
  • Use of Symmetric and PK cryptography together

12
Digital Signature
  • PK encryption in reverse
  • Two keys per user a private signing key and a
    public authentication key

P
H
-
KA
KS
(0,1)
D
E
H
P
sender
recipient
channel
13
PKI Terminology
  • PKI
  • CA
  • Privacy
  • Access control

14
PKI Terminology (Contd)
  • Non-repudiation
  • Authentication
  • Integrity

15
PKI, Entrust and the Government of Canada
  • Entrust Ltd. is the selected vendor
  • Not much action until after 1 Jan 2000
  • T-board secretariat to oversee
  • GTIS provides CA services

16
Building Software for PKI
  • Entrust developers kit
  • Entrust-ready software

17
For further information . . .
  • www.entrust.com
  • www.cse-cst.gc.ca/cse/english/gov.html
  • www.cio-dpi.gc.ca/pki/pki_index_e.html
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