IP Security

P R E S E N T E D B YP R E S E N T E D B Y::: Semester :  8                          ::: Year : 2009

              

Naeem Riaz

Maria Shakeel

Aqsa

Nizam

BEYOND FORWORD

COMPETITIVE ANALYSIS

FUCTIONAL FEATURES

INITIATIVE

BEYOND FORWORD

COMPETITIVE ANALYSIS

FEATURES

INITIATIVE

Overview at a glance

IPSecurity (IPSec)IPSecurity (IPSec)

IPSecurity (IPSec) is a collection of protocols designed by the IPSecurity (IPSec) is a collection of protocols designed by the Internet Engineering Task Force (IETF) to provide security for Internet Engineering Task Force (IETF) to provide security for a packet at the network level. a packet at the network level.

TCP/IP protocol suite and IPSec

IP Security Scenario

Benefits of IPSec

Strong security that can be applied to all traffic crossing the perimeter.Transparent to applications. No need to change software on a user or server system,

-When IPSec is implemented in a router or firewall.IPSec can be transparent to end users. There is no need to train users on security mechanismsIPSec can provide security for individual used if needed.

Cryptographic algorithms

Cryptographic algorithms defined for use with IPsec include:

HMAC-SHA1 for integrity protectionTripleDES-CBC for confidentialityAES-CBC for confidentiality

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RFC : IP Sec Documents

RFC 2401: An overview of security architectureRFC 2402: Description of a packet encryption extension to IPv4 and IPv6RFC 2406: Description of a packet emcryption extension to IPv4 and IPv6RFC 2408: Specification of key managament capabilities

INITIATIVEBEYOND

FORWORD

COMPETITIVE ANALYSIS

FUNCTIONAL FEATURES

ModesProtocols

Modes of IPSec

IPSec operates in one of two different modes.

Transport mode.Tunnel mode

TRANSPORT MODE VS TUNNEL MODE

IPSec in the transport mode does not protect the IP header; it only protects the information coming from the transport layer.

IPSec in tunnel mode protects the original IP header.

Transport mode in action

Tunnel mode in action

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Authentication Header (AH) Protocol & Encapsulating Security Payload (ESP) Protocol

The Authentication Header (AH) Protocol provides source authentication and data integrity but not privacy.Encapsulating Security Payload (ESP) provides confidentiality services (Must) and authentication services (optionally).ESP provides sources authentication, data integrity and privacy

BEYOND FORWORD

COMPETITVE ANALYSISINITIATIVE

FUNCTIONAL FEATURES

Key management IPSec services

Summarization of AH and ESP

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Key Management

IPSec architecture support for two type of key management:

Manual: Particular for small, relatively static environments.

Automated: The use of this key in a large distributed system with an evolving configuration

Contd…

Oakley: Key Detemination Protocol: Three authentication methods can be used with Oakley:

-Digital signatures -Public-key encryption -Symmetric-key encryption

ISAKMP: Internet Security Association and Key Management Protocol: -Defines procedures and packet formats to establish, negotiate, modify and delete security associations.

IPSec Services 

IPSec provided Services for:networking devices,

-such as a router or firewall Operates on the workstation or server.

-Workstation to Workstation Protection against data changes

-Accidental or Intentional Datagram’s Content can be hidden.

INITIATIVE

FUNCTIONAL FEATURES

COMPETITIVE ANALYSIS

BEYOND FOREWORD

THANK YOU

Software implementations

Real life examples

IPSec: Real Life Examples 

IPSec provides the capability to secure communications across a LAN, across private and public WANs, and across the Internet. Examples of its use include: Secure branch office connectivity over the Internet Secure remote access over the Internet Establishment of extranet and intranet connectivity with partners Enhancement of electronic commerce security Encrypt or authenticate all traffic at the IP level

Contd…

Using IPSec all distributed applications can be secured, -Remote logon, -client/server, -e-mail, -file transfer,

-Web access

SOFTWARE IMPLEMENTATIONS

NRL IPsec, one of the original sources of IPsec code.OpenBSD, with its own code derived from a BSD/OS implementation written by John Ioannidis and Angelos D. Keromytis in 1996.The KAME stack, that is included in Mac OS X, NetBS and FreeBSD."IPsec" in Cisco IOS Software "IPsec" in Microsoft Windows, including Windows XP, Windows 2000, Windows 2003, Windows Vista, Windows Server 2008, and Windows 7.SafeNet QuickSec toolkitsIPsec in Solaris

Asking queries is your right!

Computers are useless, they can only give you answer.

T H A N K Y O UT H A N K Y O U