A Secure Software Download Framework Based on Mobile Trusted Computing

Abstract

The number of software deployed on mobile terminals is dramatically increasing. However, this leads the mobile terminal facing a serious of security threats. In order to resolve these threat issues, several security requirements are proposed. Also, this paper introduces a secure software download framework and corresponding download protocol based on mobile trusted computing, designed to handle a collection of activities in software download. Such activities include authentication, download and installation of the software. The core part of the framework is a discretionary engine--Device Management Engine (DME), which provides entity authentication, integrity protection and remote attestation for the mobile device. By the introduction of software description file, we provide a mechanism to transfer Reference Integrity Metric (RIM), which makes up for the shortage of the specification.

Effect of Expanded Temperature on Microstructure of Carbon Nanotubes/Expanded Graphite Composites

“…At present, the expanded graphite electromagnetic enhancement technique researches are mainly concentrated on two aspects: one is to plate metal of high conductivity and high permeability on the expanded graphite flake layer surface, thus enhancing the expansion graphite electromagnetic performance; The other is to load magnetic ferrite between the expanded graphite gaps, thus enhancing the attenuation ability of expanded graphite to the electromagnetic wave. The dipping and reduction method, etc, are used to prepare Co/EG [3] and Ni -Fe/EG composite materials [4]; The electroless plating is used to prepare Ag/EG [5], Ni -P/EG [6] and Ni -Co -Fe/EG composite materials [7]; The coprecipitation and citrate method are used to prepare ferrite/EG complex [8]; The dry gel combustion is used to prepare nano γ-Fe2O3 / EG composite materials [9]; the method of expanded ferrocene and expansible graphite mixture under conditions of high temperature is used to prepare magnetic expanded graphite composite materials attached with iron oxide [10]. But whether metal, alloy or ferrite, its density is far greater than that of carbon material, which goes against the density decrease of expanded graphite composite material, and it has some shortages as electromagnetic shielding materials or smokescreen jamming material.…”