RSA算法是第一个能同时用于加密和数字签名的算法，也易于理解和操作。 RSA是被研究得最广泛的公钥算法，从提出到现在已近二十年，经历了各种攻击的考验，逐渐为人们接受，普遍认为是目前最优秀的公钥方案之一。RSA的安全性依赖于大数的因子分解，但并没有从理论上证明破译RSA的难度与大数分解难度等价。即RSA的重大缺陷是无法从理论上把握它的保密性能如何，而且密码学界多数人士倾向于因子分解不是NPC问题。RSA的缺点主要有：A)产生密钥很麻烦，受到素数产生技术的限制，因而难以做到一次一密。B)分组长度太大，为保证安全性，n 至少也要 600 bits以上，使运算代价很高，尤其是速度较慢，较对称密码算法慢几个数量级；且随着大数分解技术的发展，这个长度还在增加，不利于数据格式的标准化。目前，Set(Secure Electronic Transaction)协议中要求CA采用2048比特长的密钥，其他实体使用1024比特的密钥。 这种算法1978年就出现了，它是第一个既能用于数据加密也能用于数字签名的算法。它易于理解和操作，也很流行。算法的名字以发明者的名字命名：Ron Rivest, AdiShamir 和Leonard Adleman。但RSA的安全性一直未能得到理论上的证明。
上传时间： 2014-01-20
上传用户：蠢蠢66
JavaServer Faces (JSF) is the “offcial” component-based view technology in the Java EE web tier. JSF includes a Set of predefned UI components, an event-driven programming model, and the ability to add third-party components. JSF is designed to be extensible, easy to use, and toolable. This refcard describes the JSF development process, standard JSF tags, the JSF expression language, and the faces-confg.xml confguration fle.
标签： component-based JavaServer technology the
上传时间： 2014-01-12
上传用户：songyue1991
Aircrack-ng is an 802.11 WEP and WPA-PSK keys cracking program that can recover keys once enough data packets have been captured. It implements the standard FMS attack along with some optimizations like KoreK attacks, as well as the all-new PTW attack, thus making the attack much faster compared to other WEP cracking tools. In fact, Aircrack-ng is a Set of tools for auditing wireless networks.
标签： keys Aircrack-ng cracking WPA-PSK
上传时间： 2013-12-25
上传用户：bruce
Run following Matlab commands to make sure the installation worked correctly. Unlike query function, filterdb does not load all waveforms to memory but returns filtered database object. This is useful when the resulting Set of the query is too big to fit in memory. Consequent calls to read function can be made to read content of this filtered database object.
标签： installation following correctly commands
上传时间： 2013-12-30
上传用户：ainimao
Introduction ? ? The ARM Cortex -A8 microprocessor is the first applications microprocessor in ARM!ˉs new Cortex family. With high performance and power efficiency, it targets a wide variety of mobile and consumer applications including mobile phones, Set-top boxes, gaming consoles and automotive navigation/entertainment systems. The Cortex-A8 processor spans a range of performance points depending on the implementation, delivering over to 2000 Dhrystone MIPS (DMIPS) of performance for demanding consumer applications and consuming less than 300mW for low-power mobile devices. This translates into a large increase in processing capability while staying with the power levels of previous generations of mobile devices. Consumer applications will benefit from the reduced heat dissipation and resulting lower packaging and integration costs.
标签： microprocessor Introduction applications Cortex
上传时间： 2013-12-09
上传用户：xzt
Architecture and Implementation ? ? Cortex -A8 of the ARM Microprocessor October 2005 Introduction ? ? The ARM Cortex -A8 microprocessor is the first applications microprocessor in ARM!ˉs new Cortex family. With high performance and power efficiency, it targets a wide variety of mobile and consumer applications including mobile phones, Set-top boxes,
标签： Implementation Microprocessor Architecture October
上传时间： 2013-12-15
上传用户：daoxiang126
Architecture and Implementation ? ? Cortex -A8 of the ARM Microprocessor October 2005 Introduction ? ? The ARM Cortex -A8 microprocessor is the first applications microprocessor in ARM!ˉs new Cortex family. With high performance and power efficiency, it targets a wide variety of mobile and consumer applications including mobile phones, Set-top boxes,
标签： Implementation Microprocessor Architecture October
上传时间： 2017-07-23
上传用户：lizhizheng88
Written for engineering and computer science students and practicing engineers, this book provides the fundamental applications and mathematical techniques of signal processing. Topics covered include programming in MATLAB, filters, networking, and parallel processing. MATLAB is introduced and used to solve numerous examples in the book. Companion software available In addition, a Set of MATLAB M-files is available on a CD bound in the book.
标签： engineering practicing and engineers
上传时间： 2017-07-28
上传用户：fandeshun
QualNet Sensor Networks Library QualNet’s new Sensor Networks Library is a much awaited feature Set that supports the IEEE 802.15.4 standard, otherwise known as Zigbee. Zigbee networks are Wireless Personal Area Networks (WPANs) that are defi ned by a low data rate, long battery life, and secure networking. Zigbee networks support automation and remote control
标签： Networks QualNet Library Sensor
上传时间： 2017-07-30
上传用户：CSUSheep
RS_latch using vhdl, When using static gates as building blocks, the most fundamental latch is the simple SR latch, where S and R stand for Set and reSet. It can be constructed from a pair of cross-coupled NOR (Not OR) logic gates. The stored bit is present on the output marked Q. Normally, in storage mode, the S and R inputs are both low, and feedback maintains the Q and Q outputs in a constant state, with Q the complement of Q. If S (Set) is pulsed high while R is held low, then the Q output is forced high, and stays high when S returns to low similarly, if R (ReSet) is pulsed high while S is held low, then the Q output is forced low, and stays low when R returns to low.
标签： using fundamental the RS_latch
上传时间： 2017-07-30
上传用户：努力努力再努力
