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Spin-transfer torque RAM (STT-RAM) has been proposed to build on-chip caches because of its attractive features such as high storage density and ultra low leakage power. However, long write latency and high write energy are the two challenges for STT-RAM. Recently, researchers propose to improve the write performance of STT-RAM by relaxing its non-volatility property. To avoid data losses resulting...
We introduce frequent contextual term set (FCT) as an alternative concept of term set construction for text clustering which is produced from the interestingness of documents. Comparing to state-of-art term set, the proposed approach has some advantages: (1) more efficient in term set production (2) more effective in storing the vocabulary amongst documents which express the context amongst documents...
According to power split-path system of helical gears, mechanism structural model is brought up and the torque equilibrium condition and deformation compatibility condition also can be obtained. On that basis, the power flow of each gear pair is calculated, and the results of power flow in individual installation error are analyzed deeply. The research demonstrates that the errors make the load-sharing...
By analyzing some current fair E-cash schemes, we find they are not always “fair” or “practical”. So we present a new scheme based on group signature with the problems solved. In our improved E-cash system, bank performs “double-spending owner tracing” and trusted authority performs “unconditional owner tracing” and “unconditional coin tracing” when necessary. Then we provide security proofs of our...
Gear mechanism is the most popular transmission mechanism, however, conventional design methods are complex and inaccurate. The optimum design solves the above mentioned problems effectively by means of applying to gear design. In numerous of optimization software, MATLAB holds obvious predominance on program and numerical calculation. Taking single gear transmission as an example, the math model...
Network security alert causal correlation aims at correlating causal related security alerts into comprehensible attack scenarios. In this paper, we propose a novel correlation criterion by evaluating the time expenses of the attacks that trigger security alerts. By taking the attack time expenses as random variables and studying their probabilistic distribution, we can calculate the temporal correlation...
Digital signature schemes based on public-key cryptosystems generally permit existential forgery, except the schemes are equipped with some message formatting mechanisms, such as using hash functions or padding redundancies. In 2004, Chang et al. proposed a new digital signature scheme, and claimed the scheme without using any hash function or padding any redundancy can resist forgery attacks. However,...
This paper introduces a new digital signature primitive that allows a proxy signer to sign messages on behalf of the original signer, in a way that do not allow the recipient of the signature to disclose the contents of the signed information to any third party without the proxy signer's consent. The above primitive, called proxy chameleon signature enjoys all the attributes in the normal proxy signature...
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