Matrix Factorization Techniques for Recommender Systems

This document provides updates to IEEE Std 802.16's MIB for the MAC, PHY and asso- ciated management procedures in order to accommodate recent extensions to the standard.

IEEE Standard for Local and Metropolitan Area Networks Part 16: Air Interface for Fixed Broadband Wireless Access Systems Draft Amendment: Management Information Base Extensions

A systematic literature review of blockchain-based applications: Current status, classification and open issues

The sharp increase in the number of smartphones on the market, with the Android platform posed to becoming a market leader makes the need for malware analysis on this platform an urgent issue.In this paper we capitalize on earlier approaches for dynamic analysis of application behavior as a means for detecting malware in the Android platform. The detector is embedded in a overall framework for collection of traces from an unlimited number of real users based on crowdsourcing. Our framework has been demonstrated by analyzing the data collected in the central server using two types of data sets: those from artificial malware created for test purposes, and those from real malware found in the wild. The method is shown to be an effective means of isolating the malware and alerting the users of a downloaded malware. This shows the potential for avoiding the spreading of a detected malware to a larger community.

/pdf/crowdroid-behavior-based-malware-detection-system-for-x2tq6w9qk1.pdf

Crowdroid: behavior-based malware detection system for Android

我的台灣, 看見心靈的故鄉 =2009林磐聳藝術與設計展

This paper proposes a new conceptual architecture for authorization of mobile services based on blockchain technologies, and presents a design of procedures for heterogeneous mobile communication services. Furthermore, an extension of the procedures is considered in order to enhance privacy protection for users. The new architecture realizes the separation of mobile communication infrastructure and billing functions and multiple use of several mobile communication services under a single contract with a billing operator.

On blockchain-based authorization architecture for beyond-5G mobile services

The Informed Consent of a data subject (e.g., citizen) is often necessary to allow the legitimate processing of personal data by a third party application. The current implementation of Informed Consent based on End User License Agreements (EULA) has many limitations, which are likely to become more critical in future IoT applications, where the collection of personal data can happen in various ways and is not evident to the user. There is the need to define more sophisticated models of Informed Consent for IoT, which address the specific features of IoT, improve on the EULA approach, and protect the flow of personal data from the IoT sensors. In this paper, we propose an agent-based design for Informed Consent in IoT, where access to personal data is regulated through usage control policies, which can be tailored for the specific features of the user and the context. Policies are associated to users, service providers, and smart spaces containing IoT devices in a privacy-friendly way using pseudonyms. The main design concepts are described and applied to a smart city scenario, to evaluate the feasibility of the framework and the related deployment aspects.

An agent-based framework for Informed Consent in the internet of things

Simple Side-Channel Analyses (SSCA) are known as techniques to uncover a cryptographic secret from one single spied waveform. Up to now, these very powerful attacks have been illustrated on simple devices which leakage was obvious. On more advanced targets, such as high-end processors of smartphones, a simple visual analysis of the waveforms might not be sufficient to read the secret at once. In this paper, we detail and explain how a composition of time-frequency pre-processings manages to extract the relevant information from one signal capture of an asymmetric cryptographic operation (RSA and ECC) running on an Android system. The lesson is that side-channel countermeasures must be applied even on advanced platforms such as smartphones to prevent secret information theft through the electromagnetic (EM) waveforms.

/pdf/a-pre-processing-composition-for-secret-key-recovery-on-5bfahcuv50.pdf

A Pre-processing Composition for Secret Key Recovery on Android Smartphone

Public key encryption with equality test (PKEET) allows testing whether two ciphertexts are generated by the same message or not. PKEET is a potential candidate for many practical applications like efficient data management on encrypted databases. Potential applicability of PKEET leads to intensive research from its first instantiation by Yang et al. (CT-RSA 2010). Most of the followup constructions are secure in the random oracle model. Moreover, the security of all the concrete constructions is based on number-theoretic hardness assumptions which are vulnerable in the post-quantum era. Recently, Lee et al. (ePrint 2016) proposed a generic construction of PKEET schemes in the standard model and hence it is possible to yield the first instantiation of PKEET schemes based on lattices. Their method is to use a 2-level hierarchical identity-based encryption (HIBE) scheme together with a one-time signature scheme. In this paper, we propose, for the first time, a direct construction of a PKEET scheme based on the hardness assumption of lattices in the standard model. More specifically, the security of the proposed scheme is reduces to the hardness of the Learning With Errors problem. We have used the idea of the full identity-based encryption scheme by Agrawal et al. (EUROCRYPT 2010) to construct the proposed PKEET.

A Lattice-Based Public Key Encryption with Equality Test in Standard Model

Pairing based cryptography can accomplish novel security applications such as ID-based cryptosystems, which have not been constructed efficiently without the pairing. The processing speed of the pairing based cryptography is relatively slow compared with the other conventional public key cryptography. However, several efficient algorithms for computing the pairing have been proposed, namely Duursma-Lee algorithm and its variant ηT pairing. In this paper, we present an efficient implementation of the pairing over some mobilephones, and examine the feasibility of the pairing based cryptosystems on ubiquitous devices. Indeed the processing speed of our implementation in ARM9 processors on BREW achieves under 100 milliseconds using the supersingular curve over F397. It has become fast enough for implementing security applications using the pairing on mobilephones.

/pdf/efficient-implementation-of-the-pairing-on-mobilephones-36q1zr921k.pdf

Shinsaku Kiyomoto

Papers

On blockchain-based authorization architecture for beyond-5G mobile services

An agent-based framework for Informed Consent in the internet of things

A Pre-processing Composition for Secret Key Recovery on Android Smartphone

A Lattice-Based Public Key Encryption with Equality Test in Standard Model

Efficient implementation of the pairing on mobilephones using BREW