Secure and Light Weight Elliptic Curve Cipher Suites in SSL/TLS

In the current circumstance, e-commerce through an online banking system plays a significant role. Customers may either buy goods from E-Commerce websites or use online banking to move money to other accounts. When a user participates in these types of behaviors, their sensitive information is sent to an untrustworthy network. As a consequence, when transmitting data from an internal browser to an external E-commerce web server using the cryptographic protocol SSL/TLS, the E-commerce web server ensures the security of the user’s data. The user should be pleased with the confidentiality, authentication, and authenticity properties of the SSL/TLS on both the user’s web browser and the remote E-commerce web server. E-Commerce web servers should choose the best SSL/TLS cipher suites for negotiating the user in order to attain such optimistic scenarios, as the cipher suite used in SSL/TLS plays an important role in securing E-Commerce web servers. The paper primarily focuses on analyzing the SSL/TLS cipher and elliptic curves. The paper also recommends the best elliptic curve cipher suites for E-Commerce and online banking servers, based on their power consumption, handshake execution time, and key exchange and signature verification time.     

基于PIC单片机的DNS客户端的研究与实现

主要论述了以PIC单片机为载体的DNS客户端的软件设计、系统编程等内容。DNS客户端是采用Microchip公司的PIC24FJ256GA106单片机作为处理器来控制并实现的,软件方面采用的是MPLAB IDE,可以用来为Microchip单片机开发应用程序,也可以提供单一的集成环境来为嵌入式单片机开发程序代码。经过试验调试证明,该DNS客户端可以实现域名与IP地址的解析,且稳定可靠,对用户透明,操作简单。     

基于MC9S12DP256的AMT系统的设计

AMT(机械式自动变速器)是在机械式变速器的基础上发展起来的一种自动变速器,文章对其工作原理及结构组成进行了简要介绍,并且完成了以MC9S12DP256微控制器为核心的电子控制单元的硬件系统设计,通过在AMT中应用MC9S12DP256来实现对AMT系统的控制。同时系统中采用Freescale公司的高端驱动芯片MC33289来实现对电磁阀的驱动,系统结合自身CAN模块,选用Philips公司的PCA82C250设置了CAN的接口电路,用于故障码的传输以及与其他系统之间进行CAN通讯。     

面向Avalon总线的AES-128/192/256 IP核的设计与实现

以AES-128、AES-192及AES-256算法的相似性为基础,设计了一个可时分复用的AES-128/192/256IP核,并针对Avalon总线接口规范,设计了相应接口及其地址空间的映射,使该IP核能够方便的作为NiosII系统自定义组件使用。该设计以精简硬件结构为目标,与传统的以吞吐率为目标的流水线模式AES加/解密系统相比,具有消耗硬件资源小,性价比突出的优点。同时利用FPGA的片上存储模块加快读写速度,在S盒的设计上采用可重构技术,并使整个设计具有了更高的安全性、可靠性与灵活性。该IP核采用硬件描述语言Verilog设计,利用QUARTUSII8.0进行了综合和布线,最终以Altera公司的EP2C20F484C6芯片为下载目标,其时序仿真可正常运行在100MHz的时钟频率下,该IP核可广泛应用于信息安全领域。     

一种基于FPGA的可重构密码芯片的设计与实现

介绍了SHA-1、SHA224及SHA256三种安全杂凑算法的基本流程,采用可重构体系结构的设计思想和方法设计出一款可实现这三种算法的可重构密码芯片,并对关键路径进行了优化设计。最后给出了基于Altera公司的Cyclone系列FPGA的可重构密码芯片的实现结果。     

一种基于固态硬盘的快速高效的ECB256-AES加密引擎的设计

由于FLASH物理特性,固态硬盘广泛应用于政府和安全部门,存储数据安全问题随着产生;AES算法作为当今主要的数据加密标准保护数据安全,但高速AES加密引擎的实施需要消耗大量硬件资源。提出一种低开销轮内流水线的ECB256-AES加密引擎,采用共享加解密模块间的资源和使用查找表方式实现SubBytes与InvSubBytes运算减少FPGA逻辑资源的消耗;使用轮内流水线技术实现高速的加解密操作。在Xilinx xc6slx45-3fgg484上执行ECB256-AES加密引擎,加密引擎占用614个slice,时钟频率达到232.748MHz,吞吐率达到1.986Gbits/s,能够满足SATA1.0接口固态硬盘的读写速率。     

轿车用燃料电池发动机温度控制系统研究

针对燃料电池在工作过程中对温度的特殊要求,设计了一种温度控制系统,使得燃料电池工作于最佳的状态。实际系统中,利用单片机MC9S12DP256B作为主控芯片,控制质子交换膜燃料电池的温度、氢气、空气、水等系统。主控芯片采集温度信号,根据模糊控制策略产生控制量,通过125kbps波特率的CAN总线传送给风扇控制器,产生PWM波驱动散热风扇以不同转速工作。此系统应用于同济大学“超越2号”“超越3号”燃料电池轿车中,取得了良好的效果。     

Optimal design of a multi-mode interference splitter based on SOI

In this paper, the multimode waveguide lengths and the output port locations of a SOI （silicon on insulator） material-based 1×4 MMI （multimode interference） optical splitter are optimized by means of FD-BPM （finite difference - beam propagation method）. An improved 1×4 MMI optical splitter is designed. Compared with an usual optical splitter, a smaller loss 0. 12dB and a better output port power uniformity 0.11dB are achieved for the optical signal transmission.     

Raman amplification of Stokes pulse in ultra-small silicon-on-insulator optical waveguide

The stimulated Raman amplification of picosecond Stokes pulse is numerically investigated in ultra-small silicon-oninsulator optical waveguide. Numerical results show that we obtain the gain of up to 30-dB for weak Stokes pulse in the copropagation configuration for 10 mm Jength waveguide using high intensity pump oPtical pulse. The peak gain, purse width, rise time, and fall time of Stokes pulse will experience the variation course of decaying then increasing with increasing waveguide length. The time delay of output Stokes pulse is controlled by adjusting the initial time delay of both pump and Stokes pulses.     

Novel components for tunable micro-optics

We will present some technologies and devices employed for the fabrication of tunable micro-optics. Tunable liquid lenses and lens arrays as well as polymer membrane-based microlenses and scanning mirrors are of both academic and industrial interest in this area.