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GLOSSARY OF TERMS
| Compression | The coding of data to save storage space or transmission time. Although data is already coded in digital form for computer processing, it can often be coded more efficiently by using fewer bits |
| Certificate |
The public key and identity of an entity together with other information rendered unforgettable by signing the certificate with the private key of the certifying authority. Certificates are valid during a valid date range and must be reissued when it expires. |
| Client/Server | A client/server system is one where the users computer (the client) works with another computer (the Server) in order to achieve the desired results. This contrasts with the traditional mainframes where everything is done on the mainframe with the (dumb) terminals simply displaying the results. The World Wide Web is a Client/Server system with the browser on the client computer requesting Web pages from the Web Server machine. |
| CRL | Certificate revocation list - a list of client certificates that were revoked before they expired. |
| Encryption | Encryption is the mathematical process of transforming plain text into a less readable form. The less readable form is called ciphertext. This ciphertext can be read by anyone who has the key that decrypts the ciphertext. |
| Form Fields | Dynamic elements in a PDF document which can be easily updated by authoring tools without rewriting the complete document. |
| GIF | Graphic Interchange Format: A type of image file. GIF files are graphics or pictures, often used on Web pages. Because GIF files contain a maximum of 256 colors, this file format is ideal for simple graphics with minimal shading or color variation. |
| GUI | Acronym for Graphical User Interface. A GUI is the graphical user interface to a computer, and its elements include such things as: windows, icons, buttons, cursors and scroll bars. For example, this appearance of this page on you monitor is the GUI for your Web browser. |
| HTTP | The Hyper Text Transfer Protocol is the protocol used between a Web browser and a server to request a document and transfer its contents. |
| IO | Input/Output - The parts of a computer system that transfer data to or from peripheral devices. |
| Java | Java is a network-oriented programming language invented by Sun Microsystems that is specifically designed for writing programs that can be run on a variety of operating systems. Find more information at www.java.com |
| Java 2D | The Java 2D API provides enhanced two-dimensional graphics, text, and imaging capabilities for Java programs in a flexible, full-featured framework for developing richer user interfaces, sophisticated drawing programs and image editors. The standard java widget library (JFC/Swing) is based on Java2D. |
| JCE | The Java™ Cryptography Extension (JCE) is a set of packages that provide a framework and implementations for encryption, key generation and key agreement, and Message Authentication Code (MAC) algorithms. JCE is designed so that other qualified cryptography libraries can be plugged in as service providers, and new algorithms can be added seamlessly. |
| JPEG | Joint Photographic Experts Group (also abbreviated jpg) and pronounced jay-peg. JPEG is compression technique for colour images and photographs that balances compression against loss of detail in the image. The greater the compression, the more information is lost (this is called Lossy compression). |
| Outlines | The term PDF Outline consists of a tree-structured hierarchy of outline items (sometimes called bookmarks), which serve as a “visual table of contents” to display the document’s structure to the user. |
| Portable Document Format; a type of formatting that enables files to be viewed on a variety of computers regardless of the program originally used to create them. PDF files retain the "look and feel" of the original document with special formatting, graphics, and color intact. | |
| PKS encryption | Public Key Security - Adobe name from Public Key Infrastructure. |
| Private Key | A Private Key is (1) the key of a signature key pair used to create a digital signature or (2) the key of an encryption key pair used to decrypt confidential information. In both cases, this key must be kept secret. |
| Public Key | The publically available key in a Public Key Cryptography system, used to encrypt messages bound for its owner and to decrypt signatures made by its owner. |
| Revocation List | See CRL |
| Servlet Engine | An engine which runs Servlets, the engine is usually deployed as a plugin in a webserver |
| Servlets | A Java program that runs as part of a network service, typically on a Web server and responds to web requests from clients. |
| Signature | A piece of data that can be used to verify the identity of the sender. |
| Web application | A software program that uses HTTP for its core communication protocol and delivers Web-based information to the user in the HTML language. |
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