An individual of Assistant Secretary rank or higher designated by each Federal Lead Agency who cooperates with private sector representatives in addressing problems related to critical infrastructure protection and recommending components for the National Plan for Information Systems Protection. Secure Hash Algorithm Algorithm that can generate a condensed message representation called a message digest. Server A computer program that provides services to other computer programs in the same or another computer. I nfrastructure Sniffer A software or hardware tool that monitors data packets on a network to make sure messages are arriving as they should and everything else is working correctly. Software The electronically stored commands and instructions that make an IS functional, including the operating system, applications, and communications protocols.
Source code See code .
Spoofing Unauthorized use of legitimate identification and authentication data, such as user IDs and passwords, by an intruder to impersonate an authorized user or process to gain access to an IS or data on it. A markup language used to define the structure of and manage documents in electronic form. HTML Superuser A user who is authorized to modify and control IS processes, devices, networks, and file systems. System administrator Person responsible for the effective operation and maintenance of an IS, including implementation of standard procedures and controls to enforce an organization s security policy. System integrity Optimal functioning of an IS, free from unauthorized impairment or manipulation.