Digital Signatures

Q: What is the difference between digital signatures, electronic signatures, and digital certificates? A: Digital signatures are numbers that are calculated using an algorithm for the contents of a file. When this file is sent electronically, the number is appended to the back. When the receiving program receives a digitally signed file, it computes a number using the same algorithm, if the number does not match the digital signature, indicating that the file may have been modified during transmission (possibly by a man-in-the-middle attack). It does not show where content is modified, only whether the content is the same or different from the original send. Electronic signatures are basically the hands used in legal documents ...

The Big faceless PDF Library is a Java class library for creating http://www.aliyun.com/zixun/aggregation/16864.html ">pdf documents. The current extended version provides the ability to create and edit Acroforms,pdf format conversions to HTML forms, pdf import reading and editing, support for FDF, digital signatures, and authenticated text extraction. PDF forms contain text boxes, radio buttons, and Javas ...

The Big faceless PDF viewer is a swing component that can display PDF files. The goal is to provide developers with no need for a complete API interface. PDF Viewer can be installed as an applet, application, via Java Web Start, or embedded in a swing application. Print, save, text Search, forms, digital signatures and annotations are some of the features available. The viewer can contain the functionality you need based on the situation, and is http://on the Java platform ...

The wide use of open-mail open source technology enables hackers to crack digital signatures and get mail content. The problem is how to protect your e-mail messages from being compromised through the GNU Privacy Guardian. If GPG (GPG is a set of toolset for secure communication and data storage that can be encrypted and digitally signed) is not properly used, it is not possible to obtain security recognition from the information. It is entirely possible to insert additional information before and after the data is encrypted, and it is safe to mistake the user for the data. Using cryptographic techniques to authenticate or encrypt e-mail messages is quite dangerous. ...

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html"> SEO Diagnostic Taobao Guest Hosting Technology lobby in the browser, 11545.html "> We have a lot of ways to draw the generated signature effect, and There are many great and smart jQuery plugin. Digital signature is the future direction of development, it is for this reason that we collect and recommend here four great jQuery digitization ...

ElGamal algorithm can be used both for data encryption and digital signature, and its security depends on the problem of computing discrete logarithm on finite field. Key pair generation method. First select a prime number p, two random numbers, G and X,g, x < P, and compute y = g^x (mod p), the public key is Y, G, and P. The private key is X. G and P can be shared by a group of users. ElGamal is used for digital signatures. The signed information is M, first selects a random number k, K and P-1 coprime, calculates a = g ...