Covert Channels - Here to Stay ?
نویسنده
چکیده
We discuss the dificulties of satisfying high-assurance system requirements without sacrificing system capabilities. To alleviate this problem, we show how trade-offs can be made to reduce the threat of coved channels. We also clarify certain concepts in the theory of covert channels. Traditionally, a coved channel’s vulnerability was measured b y the capacity. We show why a capacity analysis alone is not sufficient to evaluate the vulnerability and introduce a new metric referred t o as the “small message criterion”.
منابع مشابه
Covert Channels | Here to Stay? Covert Channels | Here to Stay?
We discuss the di culties of satisfying high-assurance system requirements without sacri cing system capabilities. To alleviate this problem, we show how trade-o s can be made to reduce the threat of covert channels. We also clarify certain concepts in the theory of covert channels. Traditionally, a covert channel's vulnerability was measured by the capacity. We show why a capacity analysis alo...
متن کاملCovert Channels through External Interference
This paper introduces interference channels, a new kind of covert channel that works by creating external interference on a shared communications medium (such as a wireless network). Unlike previous covert channels, here the covert sender does not need to compromise an authorized sender or require the ability to send messages on the network, but only needs the ability to jam traffic for short i...
متن کاملطراحی و ارزیابی روش کدگذاری ترکیبی برای کانال پوششی زمانبندیدار در شبکه اینترنت
Covert channel means communicating information through covering of overt and authorized channel in a manner that existence of channel to be hidden. In network covert timing channels that use timing features of transmission packets to modulating covert information, the appropriate encoding schema is very important. In this paper, a hybrid encoding schema proposed through combining "the inter-pac...
متن کاملA Review on Covert Timing Channels & their Applications
Covert network timing channels control time between transmissions of packets in overt network communication and transmits hidden messages. This paper presents an overview of different concepts of covert timing channels such as types, features and properties. There is range of terms used for security of information such as encryption, covert channels, network steganography or information hiding ...
متن کاملEmploying Entropy in the Detection and Monitoring of Network Covert Channels
The detection of covert channels has quickly become a vital need due to their pervasive nature and the increasing popularity of the Internet. In recent years, new and innovative methods have been proposed to aid in the detection of covert channels. Existing detection schemes are often too specific and are ineffective against new covert channels. In this paper, we expound upon previous work done...
متن کامل