'Key distribution center kdc' diaporamas de présentation

Kerberos

Kerberos. Assume an open distributed environment in which users at workstations wish to access services on servers distributed throughout the network. Threats:. A user may gain access to a particular workstation and pretend to be another user operating from that workstation.

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15-640/440: Distributed Systems

15-640/440: Distributed Systems. Lecture 23: Key Distribution and Management Thanks to the many, many people who have contributed various slides to this deck over the years. Key Distribution. Have network with n entities Add one more Must generate n new keys

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15-640/440: Distributed Systems

15-640/440: Distributed Systems. Lecture 23: Key Distribution and Management Thanks to the many, many people who have contributed various slides to this deck over the years. Key Distribution. Have network with n entities Add one more Must generate n new keys

384 views • 38 slides

Outline

Outline. User authentication Password authentication, salt Challenge-response authentication protocols Biometrics Token-based authentication Authentication in distributed systems (multi service providers/domains) Single sign-on, Microsoft Passport Trusted Intermediaries.

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Chapter 30

Chapter 30. Message Security, User Authentication, and Key Management. Message Security It involves confidentiality, integrity, authentication and finally non-repudiation. User Authentication It means verifying the identity of the person or process that wants to communicate with a system.

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Today

Reminders Ch6 Homework due Wed 2 nd exams have been corrected; contact me to see them Continue with Chapter 7 (Security). Today. Chapter 7 roadmap. 7.1 What is network security? 7.2 Principles of cryptography 7.3 Authentication 7.4 Message integrity

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CSE331: Introduction to Networks and Security

CSE331: Introduction to Networks and Security. Lectures 26 & 27 Fall 2002. Announcements. Project 3 is due on Nov. 18 th. Primary Attacks. Impersonation. Replay. Interleaving. Reflection. Forced delay. Chosen plaintext. Primary Controls.

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Using Cryptography for Network Security

TCP/IP Internet. Host A. Host B. Using Cryptography for Network Security. Common problems: Authentication - A and B want to prove their identities to one another Key-distribution - A and B want to agree on a session key that can be used to encrypt all subsequent communications.

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SECURITY MANAGEMENT

SECURITY MANAGEMENT. Key Management in the case of public-key cryptosystems, we assumed that a sender of a message had the public key of the receiver at its disposal so that it could encrypt the message to ensure confidentiality.

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Lecture 5.1: Message Authentication Codes, and Key Distribution

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The First Ten Years of Public-Key Cryptography

The First Ten Years of Public-Key Cryptography. Paper by: Whitfield Diffie Presentation by Taotao Zhao. Initial Discoveries. Public key cryptography was born in May 1975, the child of two problems:

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Network Security

Network Security. Lecture 7 Overview of Authentication Systems http://web.uettaxila.edu.pk/CMS/coeCCNbsSp09/index.asp. Waleed Ejaz waleed.ejaz@uettaxila.edu.pk. Overview. Passwords Address based authentication Key Distribution Center (KDC) Certification Authorities (CAs)

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Information and Network Security

Information and Network Security. Ch4: Confidentiality Using Conventional Encryption. Conventional encryption to provide confidentiality. Historically, the focus of cryptology has been on the use of conventional encryption to provide confidentiality.

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Key Establishment

Symmetric key problem: How do two entities establish shared secret key in the first place? Solutions: Deffie-Hellman trusted key distribution center (KDC) acting as intermediary between entities. Public key problem:

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isc2 cissp Exam Questions - cissp Dumps PDF 100% Passing Guarantee

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