Accession Number : ADA299994

Title :   A Data Pump for Communication,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Kang, Myong H. ; Moskowitz, Ira S.

PDF Url : ADA299994

Report Date : 29 SEP 1995

Pagination or Media Count : 29

Abstract : As computer systems become more open and interconnected, the need for reliable and secure communication also increases. In this paper, we introduce a communication device, the Pump, that balances the requirements of reliability and security. The Pump provides acknowledgements (ACKs) to the message source to insure reliability.These ACKs are also used to regulate the source to prevent the Pump's buffer from becoming/staying full. This is desirable because once the buffer is filled there exists a huge covert communication channel. The Pump controls the input rate from the source by attempting to slave the input rate to the service rate through the randomized ACK back to the source. An analysis of the covert channel is also presented. The purpose of the covert channel analysis is to provide guidelines for the designer of the Pump to choose appropriate design parameters (e.g., size of buffer) dependent upon the analysis presented in this paper and system requirements.

Descriptors :   *SECURE COMMUNICATIONS, COMPUTERIZED SIMULATION, BUFFERS, INPUT, CONTROL, REQUIREMENTS, SOURCES, INFORMATION EXCHANGE, COMPUTERS, COMMUNICATION EQUIPMENT, RATES, RELIABILITY, COVERT OPERATIONS, COMMUNICATION AND RADIO SYSTEMS, MESSAGE PROCESSING, CHANNELS.

Subject Categories : Computer Systems Management and Standards

Distribution Statement : APPROVED FOR PUBLIC RELEASE