Vulnerable systems: a Trend Vulnerability: a weakness that can be exploited to cause damage Attack: a method to exploit a The internet vulnerability World-Wide connection Distributed: no central design and control O pen infrastructureS: modems, wireless, dhCP Untrusted software: applets, downloads Unsophisticated users homogeneity Security costs Hardware: x86 Market now, fix bugs later OS: Window Customers want it but wont Applications pay for7 Vulnerable Systems: a Trend • The Internet – World-Wide connection – Distributed: no central design and control – Open infrastructures: modems, wireless, DHCP – Untrusted software: applets, downloads – Unsophisticated users • Security costs – Market now, fix bugs later – Customers want it, but won’t pay for it • Homogeneity – Hardware: x86 – OS: Windows – Applications: Vulnerability: a weakness that can be exploited to cause damage Attack : a method to exploit a vulnerability