An improved signature scheme without using one-way Hash functions

Recently, Chang et al. give a digital signature scheme, where neither one-way hash function nor message redundancy schemes are used, but Zhang et al. has shown that the scheme was forgeable, namely, any one can forge a new signature by the signer’s signature, and give two forgery attacks. To the above attacks, we give an improved signature scheme based on Chang signature scheme and analyze the security of the improved scheme.     

基于Web的短消息服务平台的设计与实现

短消息服务 ( SMS)在通信产业中正占据越来越重要的位置。本文描述了短消息服务平台与网络运营商网络实体之间的关系 ,分析了短消息服务平台的系统结构 ,最后给出了基于 Web的短消息服务平台的设计与实现 ,该平台集成了信息发布和信息点播功能     

MMS(多媒体短消息业务)及其实现

MMS是3GPP和WAP论坛制订的移动数据业务。与SMS相比，它除了可以发送简单文本消息外还可以发送图像、音频、视频、动画等多媒体信息内容。文中对MMS的体系结构进行了介绍，对MMS系统两种实现方式：基于WAP的实现和基于IP的实现进行了探讨，最后还对MMS业务的部署进行了讨论。     

多媒体短消息技术及其应用

介绍了多媒体短消息的协议基础业务体系结构以及在现网的实现方式，并介绍了多媒体短消息业务种类。     

群集系统的设计与实现

天津通信本地交换网管系统采用惠普公司的MC／ServiceGuard群集技术实现高可用性和高可靠性，保障全网话务和告警数据的准确性。在介绍群集的概念、特点以及MC／ServiceGuard技术原理的基础上，重点介绍网管系统的MC／ServiceGuard在天津通信网管系统的设计思路以及实现过程。     

基于PCIe总线的双路1394B接口模块设计与实现

为了满足航电系统中前端传感器捕获的图形图像数据实时传输的需求,设计并实现了基于PCIe总线的双路1394B接口模块。该模块通过PCIe接口与主机交互,采用S400β传输模式,软件设计符合标准OHCI规范,支持AS5643协议,异步流包数据收发采用链式队列管理,主机与1394B控制器之间通过DMA操作,实现大数据块的并行处理,两路1394B相互独立,显著提升数据传输性能。测试验证结果表明,该模块具备带宽高、可靠性高、CPU资源占用率低等特点,已在某项目获得成功应用,实现了图形图像数据的实时传输,满足系统设计要求,表现出了良好的稳定性和适应性,具有实践应用价值。     

A short ID‐based proxy signature scheme

The notion of identity‐based proxy signature with message recovery feature has been proposed to shorten identity‐based proxy signatures and improve their communication overhead because signed messages are not transmitted with these kinds of signatures. There are a few schemes for this notion: the schemes of Singh and Verma and Yoon et al. Unfortunately, Tian et al., by presenting two forgery attacks, show that Singh and Verma scheme is not secure, and also, the scheme of Yoon et al. does not support provable security. The contributions of this paper are twofold. First, we review the scheme by Yoon et al. and discuss why it does not have message recovery property, and consequently, it is not short. Second, we propose a short identity‐based proxy signature scheme with the help of message recovery property and show that it is secure under computational Diffie–Hellman assumption in the random oracle model. Furthermore, our scheme is more efficient than (as efficient as) previous identity‐based proxy signatures. Copyright © 2014 John Wiley & Sons, Ltd.     

Big data-enabled multiscale serviceability analysis for aging bridges☆

This work is dedicated to constructing a multi-scale structural health monitoring system to monitor and evaluate the serviceability of bridges based on the Hadoop Ecosystem (MS-SHM-Hadoop). By taking the advantages of the fault-tolerant distributed file system called the Hadoop Distributed File System (HDFS) and high-performance parallel data processing engine called MapReduce programming paradigm, MS-SHM-Hadoop features include high scalability and robustness in data ingestion, fusion, processing, retrieval, and analytics. MS-SHM-Hadoop is a multi-scale reliability analysis framework, which ranges from nationwide bridge-surveys, global structural integrity analysis, and structural component reliability analysis. This Nationwide bridge survey uses deep-learning techniques to evaluate the bridge serviceability according to real-time sensory data or archived bridge-related data such as traffic status, weather conditions and bridge structural configuration. The global structural integrity analysis of a targeted bridge is made by processing and analyzing the measured vibration signals incurred by external loads such as wind and traffic flow. Component-wise reliability analysis is also enabled by the deep learning technique, where the input data is derived from the measured structural load effects, hyper-spectral images, and moisture measurement of the structural components. As one of its major contributions, this work employs a Bayesian network to formulate the integral serviceability of a bridge according to its components serviceability and inter-component correlations. Here the inter-component correlations are jointly specified using a statistics-oriented machine learning method (e.g., association rule learning) or structural mechanics modeling and simulation.     

自主安全的智能家居服务器系统设计

为实现实时对家居环境的监控以及满足人们对家居环境安全性的要求,设计一种结合ARM,Android,ZigBee,GSM,Redis以及BOA技术的安全智能家庭系统。家电节点传感器负责家电设备信息收集,ZigBee网络负责传输这些信息,ARM服务器进行处理,GSM模块发送报警信息,Android客户端进行信息显示并控制。针对实时性以及安全性要求,重点研究服务器的硬件通信、守护进程、数据接收以及解析、消息队列管理等。实验结果表明,系统通过手机端可随时随地对家居环境进行监控,操作几乎无延迟;服务器自主安全运行,无需人工干预;数据存储在本地服务器,不经过第三方;手机端每次登录比对号码,密码以及IMEI,安全性得到保障。     

彩印业务实现方案分析

本文通过对这类业务的需求进行分析,提出实现业务的多种方案,并对各种技术方案做了较为系统的对比和优缺点对比,并结合现有网络情况提出了较好地实现彩印业务的方案。