Abstract—The capacity of the two-user Gaussian interference channel has been open for 30 years. The understanding on this problem has been limited. The best known achievable region is due to Han and Kobayashi but its characterization is very complicated. It is also not known how tight the existing

(AWGN) channels, which may be good models for hybrid transmission applications such as digital audio broadcasting, and mean-square-error-constrained attack channels that model private-key watermarking applications.

Two kinds of contemporary developments in cryptography are examined. Widening applications of teleprocessing have given rise to a need for new types of cryptographic systems, which minimize the need for secure key distribution channels and supply the equivalent of a written signature. This paper

By carefully measuring the amount of time required to perform private key operations, attackers may be able to find fixed Diffie-Hellman exponents, factor RSA keys, and break other cryptosystems. Against a vulnerable system, the attack is computationally inexpensive and often requires only known

signatures are typed in by a human or signatures are sent over a low-bandwidth channel. 1

Today’s smartphone operating systems fail to provide users with adequate control and visibility into how third-party applications use their private data. We present TaintDroid, an efficient, system-wide dynamic taint tracking and analysis system for the popular Android platform that can

Rome. early China, and the Middle Ages and Renaissance in Europe is used to investigate the hypotheses. It is often assumed that an economy of private enterprise has an automatic bias towards innovation, but this is not so. It has a bias only towards profit. [HOBSBAWM 1969, p. 401 When conjectures

that different kinds of institutional heritages afford different scope for private interests to express themselves, we obtain a...

in the military and government sectors, and the resulting lattice is discussed. This is followed by a review of the Bell-LaPadula model, which enforces information flow policies by means of its simple-security and *-properties. It is noted that information flow through covert channels is beyond the scope

This paper presents a modified version (DHBT-E) of an existing two-party key agreement protocol (DH-BT) used for efficiently establishing secure communication sessions in local wireless networks. A formal security analysis in the model of Bellare and Rogaway is provided to justify the relevant security properties and thus to enforce trustworthiness. The basic intuition is that key agreement in open-air-networks should provide forward secrecy, since eavesdropping is essentially for free and hence may give the adversary a small but significant advantage. For this reason, the protocol uses basic Diffie-Hellmann key exchange. Entity authentication is based on the shared string model, with the key formed by two cryptographic component keys (one key being eventually a low-entropy human memorable string), thus guaranteeing a stronger (two-factor) level of security. Key words: Wireless networks, Diffie-Hellman key exchange, Symmetric key