利用DSP Builder设计定点FFT处理器

分析了FFT算法的原理,并利用DSP Builder建立了输入为8点基-2 FFT算法的基本模型,在Simulink和QuartusⅡ中分别进行了仿真,并将仿真结果与Matlab仿真值进行了比较,实现了8点实序列FFT算法.基于DSP Builder的FFT算法设计简单,可以重复使用,大大提高了设计效率.     

“数字信号处理”课程教学方法的探索

为了适应素质教育对电子信息专业人才培养的要求,针对"数字信号处理"课程的特点,对"数字信号处理"的教学方法进行探索。实践证明,通过对课堂教学的优化、建立Matlab数字信号处理实验仿真系统和改革考核学生的制度对提升学生综合能力和素质、提高课堂教学质量有良好的效果。     

Digital Multi-Signature Based on the Controlled Quantum Teleportation

In this paper, a scheme which can be used in multi-user quantum digital signature is proposed. The scheme of signature and verification is based on the characters of GHZ （Greenberger-Horne-Zeilinger） states and controlled quantum teleportation. Different from the digital signatures based on computational complexity, this scheme is unconditional secure, and compared to the former presented quantum signature scheme, it does not rely on an arbitrator to verify the signature and realize a message can be signed by multi-user together.     

Provably Secure Convertible Directed Partially Blind Signatures

Combining the concept of partially blind signature with the concept of directed signature, we introduce a new concept of convertible directed partially blind signature （CDPBS）, in which only the signer and the user can verify, confirm and disavow the validity of given signatures and convert given signatures into universally verifiable ones, to meet the need of signing personally or commercially sensitive messages. We give a formal definition of CDPBS and propose a concrete provably secure CDPBS scheme. The proposed scheme is efficient and secure, in which its unforgeability is the same as that of the Schnorr＇s signature scheme and its untransferability relies on the hardness of the decisional Diffie-Hellman problem. Furthermore, by letting the user＇s private key be a common constant, the proposed scheme can be used as a normal partially blind signature scheme.     

A Proxy Blind Signature Scheme Based on DLP

0 Introduction The concept of blind signature was firstly intro- duced by David Chaum in 1982[1]. Since then, scholars have tried their best to propose various blind signature schemes and applied them to some security systems, such as e-cash and e-voting …     

Provable Security of ID-Based Proxy Multi-Signature Schemes

In the last couple of years, D-based cryptography has got fruitful achievements. Proxy multi-signature allows a designated person, called a proxy signer, to sign on behalf of two or more original signers. In this paper, we present a general security model for ID-based proxy multi-signature （ID-PMS） schemes. Then, we show how to construct a secure ID-PMS scheme from a secure ID-based signature scheme, and prove that the security of the construction can be reduced to the security of the original ID-based signature scheme.     

Efficient ID-Based Proxy Blind Signature Scheme

0 Introduction Ablind signature, primitively introduced by Chaum[1], plays a central role in cryptographic protocols such as e-voting,e-payment that require user anonym- ity[2,3]. Such a signature allows a user to obtain a signa- ture of a message in a wa…     

《信号与系统》与《数字信号处理》课程教学改革探索

对《信号与系统》和《数字信号处理》两门信息类专业的核心课程进行改革，建立新的课程体系，对教学内容、教学方式、教学手段、实验教学、考核方式等方面进行了改革的尝试，阐述了关于这两门课程改革的探索与实践。     

一种安全高效的椭圆曲线代理签名方案

张宁等人于2005年提出一个安全的基于椭圆曲线的代理签名方案．通过对此方案的研究，提出一个新的安全且高效的代理签名方案．新方案除了具备原方案的所有优点外，还具备签名速度快的特性．     

一种基于身份的代理多重签名方案

结合基于身份的密码体制和代理多重签名，使用双线性映射，构造了一种基于身份的代理多重签名方案．分析表明，该方案可有效地抵御对代理签名的伪造攻击，满足代理签名所要求的安全特性．