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Running VBScript Code Files
This section provides a tutorial example on how to run a VBScript file with or without 'cscript/wscript' command.
2015-08-09, 2788👍, 1💬

💬 2015-08-09 mll: p

Usage Examples of Public Key Infrastructure
This section provides some usage examples of PKI (Public Key Infrastructure), like HTTPS (Hypertext Transfer Protocol Secure) protocol, digital signature, encryption of documents, digital identification.
2019-05-14, 2787👍, 3💬

💬 2019-05-14 dsdsdasd: Naaaaa

💬 2017-11-30 naveed: nice!!

💬 2017-09-28 Irtza: ok

RsaKeyGenerator.java for RSA Key Generation
This section describes the initial draft of a RSA public key and private key generation implementation using the java.math.BigInteger class.
2017-01-05, 2786👍, 2💬

💬 2017-01-05 Herong: Alex, you are right. q should be selected independently from p. I will make a change in the next revision.

💬 2016-12-28 Alex T.: Using nextProbablePrime() to compute q appears somewhat risky to me: An attacker with the knowledge of N=p*q could simply comput...

Opening UTF-16LE Text Files
This section provides a tutorial example on how to open a UTF-16LE text file with Nodepad correctly by selecting the Unicode encoding option on the open file dialog box.
2018-09-09, 2779👍, 3💬

💬 2018-09-09 Nit: GIF89a��������!�, T;

💬 2018-02-12 Herong: Krishna, dates should have nothing to do with UTF-16 LE format. Can you provide some examples?

💬 2018-02-08 Krishna: When I open a UTF-16 LE file notepad and and notepad ++ ,it is showing special characters for the dates. Is it because notepad +...

javax.swing.event.MenuListener - Menu Listener Interface
This section provides a tutorial example on how to use javax.swing.event.MenuListener ,menu listener interface, to catch events fired by JMenu objects.
2016-08-02, 2768👍, 3💬

💬 2016-08-02 Herong: Tony, I believe that * is a wildcard, meaning all classes in the javax.swing package.

💬 2016-07-20 tony narloch: Hi, I am curious as to what the * denotes. Is that a wildcard, or meant to any/all things associated with javax.swing?

Introduction of HTTPS (Hypertext Transfer Protocol Secure)
This chapter provides a quick introduction of HTTPS (Hypertext Transfer Protocol Secure). Topics include what is HTTPS; Web server authentication; communication data encryption.
2017-11-15, 2755👍, 3💬

💬 2017-11-15 amal: third visit

💬 2016-04-29 amal: second visit

💬 2016-04-29 amal: first visit

DES Algorithm - Illustrated with Java Programs
This chapter provides tutorial examples and notes about DES algorithm illustrated with Java programs. Topics include Java illustration program of DES key schedule algorithm and DES encryption algorithm.
2017-04-16, 2721👍, 5💬

💬 2016-10-17 Deepak: Working on Algorithm

💬 2016-05-08 koko: thanks

💬 2015-10-04 Herong: Salai, you are most welcome.

💬 2015-10-02 Salai Joy Siang Pi: Thank you so much. It's very helpful for my mini-thesis.

Removing IE Addon "Windows Live ID Sign-in Helper"
This section provides a tutorial example on how to disable and remove 'Windows Live ID Sign-in Helper' addon from Internet Explorer.
2016-05-04, 2708👍, 1💬

💬 2016-05-04 mphuludi normn masekela: I forgot my yahoo pass word

Android Debug Bridge (adb) Tool
This section describes commands and options supported by the 'adb' tool. The 'adb help' command can give you details on how to use other 'adb' commands and options.
2017-08-05, 2694👍, 2💬

💬 2017-08-05 Herong: What is the -obb you are referring to?

💬 2017-08-03 AndroidUser: -obb doesn't work 1.0.31,32

Removing IE Addon "Groove GFS Browser Helper"
This section provides a tutorial example on how to disable and remove 'Groove GFS Browser Helper' addon from Internet Explorer.
2019-03-02, 2662👍, 4💬

💬 2019-03-02 Herong: Kurteb, try to close IE, then delete the file. Or restart your PC in safe mode to delete the file.

💬 2019-02-26 Kurteb: after disabling it, cannot delete it from the folder, even using Revo or Ccleaner.

💬 2017-07-15 Herong: EEZEE66, maybe ccleaner is just reporting that the registry entry of the plug is in still exists, not actively running in IE.

💬 2017-07-14 EEZEE66: I found that even disabling it in manage add ons really didn't turn it off. I used ccleaner in tools choose browser plug ins and...

Chinese Web Pages with GB18030 Encoding
This section describes how to create a Chinese HTML document in GB18030 encoding and publish it on the Apache server.
2016-07-08, 2645👍, 5💬

💬 2015-11-24 Herong: Jee, there is no way to configure Chrome to ignore the encoding error and continue. But you can tell browser to use a different ...

💬 2015-11-24 Jee: I'm simply using Chrome... Is there a way to say to the XML "Just ignore caracters that you would consider as weird and display ...

💬 2015-11-22 Herong: Jee, the issue is probably not in your data. What is the program you use to display the XML data?

💬 2015-11-22 Jee: Hello, I have a database in GB18030. I am trying to display datas through XML, and for some kind of datas, the display in a brow...

Cryptography Basic Concepts
This chapter describes some basic concepts of cryptography: what is cryptography, what is function and what is encryption.
2016-04-07, 2639👍, 4💬

💬 2016-02-03 dinesh: thanks

💬 2015-12-28 Herong: Malini, RSA is good example of cryptosystem. Read Introduction of RSA Algorithm for more information.

💬 2015-12-28 malini: need cryptosystem

"instanceof" Operator - Determining Object Type
This section provides a quick description of the 'instanceof' operator. A tutorial example is provided on how to use the 'instanceof' operator to determine what is the type of an object, and its parent types.
2018-08-06, 2634👍, 1💬

💬 2018-08-06 esor: nice

Tutorial Book List
Tutorial Books: Android Tutorial Examples Bitcoin Tutorial Examples C# Tutorial Examples Cryptography Tutorials Data Encoding Tutorial EC Cryptography Tutorials Ethereum Tutorial Examples Flash Tutorial Examples Free Web Services GB2312 Character Set HTML Tutorial Examples Java Tutorial Examples Jav...
2019-12-08, 2617👍, 0💬

Operations on "byte" Data Type Values
This section provides a tutorial example on how 'byte' values are casted to 'int' values when they are involved in arithmetic, comparison and bitwise operations.
2017-01-21, 2616👍, 2💬

💬 2017-01-21 Herong: Anonymous, Good question. But what do you expect an operation of byte+byte will do?

💬 2017-01-19 Anonymous: Reason for why byte doesn't holds good the + operator directly.

Installing Adobe Reader APK File
This section provides a tutorial example on how to install the Adobe Reader APK file to the Android emulator using the 'adb' tool provided in the SDK package. Adobe Reader runs ok on the emulator. But it failed to show PDF files in the /sdcard/Download folder.
2016-10-02, 2605👍, 1💬

💬 2016-10-02 Nadeem: Great Stuff!!!

Cryptography Terminology
This section provides descriptions on some commonly used cryptography terminologies
2019-02-18, 2602👍, 2💬

💬 2019-02-18 Hh: &lt;body bgcolor="red">

💬 2015-10-24 dexter aparicio: this site is my favorite reference on cryptography topics

What Is Cryptography?
This section describes what is cryptography - The study of techniques related to all aspects of data security.
2017-02-18, 2600👍, 5💬

💬 2017-02-18 gabu: ggoodd

💬 2016-11-17 mohamed: yes

💬 2015-10-20 Herong: Hi Ian, the Rail Fence cipher is very simple example of encryption we can do manually. See the Transposition cipher page at wiki...

💬 2015-10-19 Ian T. Lee: Can you give me a simple example of how to do cryptography manually?

💬 2015-08-06 arnav: good

WSF - Windows Script File XML Format
This section describes the WSF (Windows Script File) XML format. Multiple script jobs with different scripting language can be defined in a single WSF file.
2016-04-08, 2570👍, 2💬

💬 2016-04-08 Herong: Rich, can you show us your command line and the output?

💬 2016-04-02 Rich: I keep getting can't find host scrip file, can you help?

PDF Printing Version: JDBC Tutorials
Information on how to obtain the PDF version of this book for printing.
2019-05-10, 2567👍, 19💬

💬 2019-05-10 Raed: nice to gut Ducument about JDBC thanks alot.

💬 2018-04-21 Herong: Tony, you are welcome!

💬 2018-04-20 Tony Ekpo: I appreciate your work because it has help me so much connecting to the database, more grace n ur work.

💬 2016-12-16 Herong: Dzung, check your email. You should have it now.

💬 2016-12-16 Dzung Nguyen: I donated $10 through paypal, but I still can't download this book.

(More comments ...)

System Startup Selections - Normal and Diagnostic Startups
This section describes 3 startup modes provided by the system configuration tool 'msconfig.exe' and how to use the Diagnose Startup mode.
2016-04-30, 2564👍, 1💬

💬 2015-12-14 bazzah: evoking the blackvomit.

javax.swing.JFileChooser - File Chooser Dialog Box
This section provides a tutorial example on how to use the javax.swing.JFileChooser class to create a file chooser dialog box for the Open command and the Save command.
2016-01-03, 2504👍, 8💬

💬 2016-01-03 Travis: Hello thanks, Yea I fixed the problem with the forgotten import I should have known better just having a problem with the filein...

💬 2015-12-31 Herong: Travis, May be you forget to import the IO package. The "underline in red" means class definition is missing. Try to add the fol...

💬 2015-12-31 Travis: Missing import.java.io was the problem thanks everyone

💬 2015-12-30 Travis: Value is just a string , String rootDir; still have been playing around with it and can't seem to get it going , very odd:(

💬 2015-12-30 Ken: @Travis, what is the value of "rootDir"? Looks like you are trying to get an inputstream on a directory, not a file.

(More comments ...)

XML Files with Linked External XSD Files
This section provides a tutorial example on how to store XSD statements in an external file, which can be then linked to XML files. The external XSD file should also be a well-formed XML document.
2017-03-11, 2437👍, 1💬

💬 2017-03-11 somebody: it was completly helpfull and it was very important

Using Google Chrome as an XML Syntax Checker
This section provides a tutorial example on how to use Google Chrome as an XML file syntax checker. If there are syntax errors in an XML file, Chrome will stop displaying the XML file at the first error location.
2018-11-10, 2414👍, 3💬

💬 2018-11-10 Herong: ej, You are right. Chrome can only parse an XML document and print out issues that occur during the parsing process. If you want...

💬 2018-11-08 ej: While the information contained here seems to be correct, I would use the term "well wormedness verification" in place of "synta...

💬 2017-08-11 literal nazi: meaningful comments

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