By P. K. Yuen
The move of knowledge over the realm vast internet relies significantly on safe communications. the necessity to defend the fabric we ship and obtain from our on-line world, from the most important of commercial transactions to the best of non-public web-pages, is essential in making sure we will be able to proceed to take advantage of this significant source correctly. Cryptology presents the main trustworthy instruments for storing or transmitting electronic details and is the choicest for reaching the degrees of protection our on-line interactions call for.
Taking a step by step process P. ok. Yuen demonstrates how you can grasp useful encryption/decryption algorithms, implementation options, and web-based safety abilities including:
· holding web pages from hackers and viruses;
· Encrypting e mail, web content, and immediate messages;
· development a safe web-database;
· appearing safe enterprise transactions over the web.
Working from a problem-solving point of view, he exhibits the right way to enforce safeguard recommendations and appears from the attacker’s standpoint at attainable demanding situations to that safety. in brief, sensible Cryptology and internet defense deals a pragmatic and accomplished advisor to all elements of internet security.
Over one hundred twenty labored examples, many from undefined, show the most important concerns in imposing net security.
Covers all of the significant encryption options and criteria, together with the AES.
Examines the newest net applied sciences when it comes to safety, together with XML Signatures and XML electronic Contracts
PK Yuen is a well-known specialist on Communications, net and the area large net. He has over thirteen years’ adventure engaged on net applied sciences together with huge scale program advancements, engineer education, venture management and dealing at the defense structures of foreign airports. he's co-author of useful net applied sciences, additionally released via Addison-Wesley.
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Extra resources for Practical Cryptology and Web Security
Write() will send the string inside the bracket to the browser. e. A). write() function, character ‘A’ is displayed. 1 can be displayed easily. fromCharCode(ii) + " ") } This is a simple for-loop in ECMAScript. ’. In order to separate the characters, a space is added at the end (+ " "). The plus sign in ECMAScript is used to concatenate strings. 1. htm. This is an XHTML page to print out the printable ASCII character set ranging from 33 to 126. As you can see, a simple for-loop is used in lines 14–17 to loop through the ASCII code set.
The result will be displayed in the text area (lines 27–29) in the third group. htm. qxd 08/17/2005 08:51 AM Page 37 This page contains one script block and one function, caesar_code(). Inside the function, the statement in line 36 is used to obtain the original message and store it in the string variable sstr. value captures the Caesar shifting number stored from the text box where id="caesar_v". Since the returned value is a string, the parseInt() function is employed to convert it to an integer and assign it to variable caesarV.
It takes a sequence of binary data and converts them into a sequence of printable characters. Each character is one of the following 64 (Base64 string) ranging from 0–63, and therefore the process is called ‘Base64’. ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/ Surprisingly, this simple algorithm is widely used. Your email system uses it for attachments. HTTP uses it to display a login window on your browser communicating your username and password. This process can protect your Web site in a standard way, called ‘HTTP Authentication’.
Practical Cryptology and Web Security by P. K. Yuen