首先阐述了电子商务的四个主要的安全需求，并就信息加密、数字签名、数字证书等信息安全技术的特点及其应用作了探讨。
First, This paper discusses four E-business's demands for safety, then introduces technology of information security and how they meet demands of secure electronic transactions.
签名过程分为四个阶段：系统初始化、生成个体签名、生成群签名以及签名验证。
The signature process included four phases: system initialization, individual signature generation, group signature generation and signature verification.
本系列同时收录了四个由他创作的夏洛克·福尔摩斯探案的故事——《蓝色宝 石》、《绿玉王冠》、《诺伍德谜案》和《四签名》。
His story about the detective Sherlock Holmes - The Blue Diamond, The Emerald Crown, The Norwood Mystery and The Sign of Four are also available in the Bookworms series.
为了较全面地研究电子签名的法律效力这一关键问题，本文分四个部分对电子签名的法律效力问题进行详细的探讨。
To discuss the legal effects of electronic signature sufficiently, in this dissertation, four relative aspects will be studied in details.
首先，介绍了票据伪造的四个构成要件，就三种票据签章方式：签名、盖章、签名加盖章如何认定伪造作了分析；
The second chapter is mainly about composition of forgery and alteration of bill, introduces four composing elements of bill forgery and identifies three kinds of false signatures.
首先，介绍了票据伪造的四个构成要件，就三种票据签章方式：签名、盖章、签名加盖章如何认定伪造作了分析；
The second chapter is mainly about composition of forgery and alteration of bill, introduces four composing elements of bill forgery and identifies three kinds of false signatures.
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