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Chapter 9. Sending and Receiv ing Secure E-mail

Chapter 9. Sending and Receiving Secure E-mail. Index (1/2) What is E-mail Security? Public Key Cryptography Getting and Using Your (Other People s)

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What Is Security? 메시지 보안의 이유 Packet sniffers or casual hackers “ Public Key Cryptography ” 한 쌍의 Key 를 받음 ( 암호화 시 사용하는 것, 모든 사람들이 사용할 수 있는 것 ) Using Cryptography with Decrypted digital ID, attach

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Page 1: Chapter 9. Sending and Receiving Secure E-mail. Index (1/2) What is E-mail Security? Public Key Cryptography Getting and Using Your (Other People  s)

Chapter 9.Sending and Receiving S

ecure E-mail

Page 2: Chapter 9. Sending and Receiving Secure E-mail. Index (1/2) What is E-mail Security? Public Key Cryptography Getting and Using Your (Other People  s)

Index (1/2)What is E-mail Security?Public Key CryptographyGetting and Using Your (Other People’s) Own Digital CertificateSecure E-mail with

Outlook 98Outlook ExpressNetscape Messenger

Index (2/2)Get and Using PGPSecure E-mail with

Eudora/Outlook 97/Other Programs

Page 3: Chapter 9. Sending and Receiving Secure E-mail. Index (1/2) What is E-mail Security? Public Key Cryptography Getting and Using Your (Other People  s)

What Is E-mail Security?메시지 보안의 이유

Packet sniffers or casual hackers

“Public Key Cryptography”한 쌍의 Key 를 받음 ( 암호화 시 사용하는 것 , 모든 사람들이 사용할 수 있는 것 )

Using Cryptography with E-mailDecrypted digital ID, attach E-mail

Page 4: Chapter 9. Sending and Receiving Secure E-mail. Index (1/2) What is E-mail Security? Public Key Cryptography Getting and Using Your (Other People  s)

Public Key CryptographyDigital Certificates (Digital ID)

인증기관 (ex. VeriSign) (S/MIME)Browser 에 포함된 E-mail Agent 에 사용됨 (Outlook98, Outlook Express, Netscape Messenger)

PGP (PGP/MIME)Eudora & Outlook 97 등 나머지 다수의 프로그램에서 사용됨

Page 5: Chapter 9. Sending and Receiving Secure E-mail. Index (1/2) What is E-mail Security? Public Key Cryptography Getting and Using Your (Other People  s)

Getting and Using Your Own Digital Certificate

Getting Your Own Digital Certificate브라우저로 ‘ http://www.verisign.com’ 에 접속1 년 $14.95 (60 일 Trial 가능 )

Backing Up Your Digital Certificate일반 Mail Agent

• 다운로드시 Copy 가능• 카피본으로 사용 가능

브라우저의 경우• Export option 제공 (Internet Explorer : ‘Client Authentication’ Netscape Navigator : ‘Your Certificates’)

Page 6: Chapter 9. Sending and Receiving Secure E-mail. Index (1/2) What is E-mail Security? Public Key Cryptography Getting and Using Your (Other People  s)

Getting Other People’s Digital Certificates

‘http://digitalid.verisign.com/query.htm’에서 찾는 방법

Outlook, Outlook Express or Netscape Messenger 등에서 자동으로 찾아줌

Page 7: Chapter 9. Sending and Receiving Secure E-mail. Index (1/2) What is E-mail Security? Public Key Cryptography Getting and Using Your (Other People  s)

Secure E-mail with Outlook 98 & Outlook Express

Importing Your Digital CertificateSending Signed or Encrypted MessagesReceiving Signed or Encrypted MessagesStoring Other People’s Digital Ids

(Netscape Messenger 도 같은 방법으로 Secure E-mail 을 보냄 )

Page 8: Chapter 9. Sending and Receiving Secure E-mail. Index (1/2) What is E-mail Security? Public Key Cryptography Getting and Using Your (Other People  s)

Getting and Using PGP(1/2)Getting a PGP Program

사업용• ‘http://www.nai.com’

개인용• ‘http://web.mit.edu/network/pgp.html’

문서 & 질문들• ‘http://cryptography.org/getpgp.htm’• ‘http://www.pgpi.org’

Page 9: Chapter 9. Sending and Receiving Secure E-mail. Index (1/2) What is E-mail Security? Public Key Cryptography Getting and Using Your (Other People  s)

Getting and Using PGP(2/2) Creating a Key PairManaging Your Key Ring

Own Key & Other’s KeyDistributing your PGP Public Key

PGP Key server 에 등록타인에게 key 를 E-mail 로 보냄

Establishing PGP Preferences

Page 10: Chapter 9. Sending and Receiving Secure E-mail. Index (1/2) What is E-mail Security? Public Key Cryptography Getting and Using Your (Other People  s)

Secure E-mail with Eudora & Outlook 97

Sending Signed or Encrypted MessagesReceiving Signed or Encrypted MessagesSaving Other People’s Public Keys

( 다른 프로그램들도 같은 방법으로 Secure E-mail 을 보냄 )