We present a term extractor that uses Wikipedia as an semantic information source. The system has been tested on a Spanish medical corpus. We compare the results obtained using a module of a hybrid term extractor and an equivalent module that use the Wikipedia. The results show that this resource may be used for this task.

This paper discusses the security of a leakage-resilient stream cipher presented at FOCS 2008, instantiated in a practical setting. Based on a case study, we put forward implementation weaknesses that can be exploited in a key-recovery attack. We first show that in our experimental context (8-bit device, Hamming weight leakages, Gaussian noise), a successful attack against the investigated stre...

We report on the extraction procedures of low-contrast symptomatic hypodensity optimized for a computed tomography-based diagnosis. The specific application is brain imaging with enhanced perception of hypodense areas which are direct symptoms of acute ischemia. A standard low-contrast phantom, as commonly employed in dosimetry and imaging quality evaluation, was used to derive numeric criteria...

In privacy amplification, two mutually trusted parties aim to amplify the secrecy of an initial shared secret X in order to establish a shared private key K by exchanging messages over an insecure communication channel. If the channel is authenticated the task can be solved in a single round of communication using a strong randomness extractor; choosing a quantum-proof extractor allows one to e...