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"getblock blockhash 0" - Serialized Hex Blcok Data
This section describes how to get Serialized Hex Blcok Data.
2018-02-24, 120👍, 2💬

💬 2018-02-24 Herong: Dan, please see Data Structure of Bitcoin Block section.

💬 2018-02-19 Dan: How to decode the block raw data?

DES Key Schedule (Round Keys Generation) Algorithm
This section describes DES (Data Encryption Standard) algorithm - A 16-round Feistel cipher with block size of 64 bits.
2018-02-24, 7858👍, 13💬

💬 2018-02-24 Herong: hema, values in the pc-2 table are pre-defined by the algorithm. They are not calculated.

💬 2018-02-23 hema: i understood pc-1 table can you pls guide to calculate manually pc-2 table in des algorithm.

💬 2017-10-24 Herong: QuAI, you are right those bits are not used in the Permuted Choice 1 (PC1) table.

💬 2017-10-19 QuAl: And forget about bits 8, 16, ..., 64 of initial кey K! Those bits for parity check only (see FIPS 46-3)

💬 2017-06-15 Azaz: Not that much useful

(More comments ...)

Block Hash Calculation in Python
This section describes how to calculate Bitcoin block hash in Python.
2018-02-16, 128👍, 1💬

💬 2018-02-16 Lee: This helped me a lot!

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.
2018-02-16, 279👍, 2💬

💬 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 +...

XSLT Transformation
This section provides a tutorial example on how to perform XSLT (Extensible Stylesheet Language Transformations) using XML Tools Plugin in Notepad++.
2018-02-16, 12579👍, 12💬

💬 2018-02-10 Herong: Mark, thanks for the confirmation.

💬 2018-02-07 Mark: It does not support XSLT 2.0 I tried it.

💬 2017-06-06 Herong: Rubens, I am not sure if the current version of XML Tools Plugin supports XSLT 2.0 or not. Have you tried it?

💬 2017-06-04 Rubens: Hi Herong, XSLT should be version 1.0 or does the plugin also supports XSLT version 2.0?

💬 2016-09-23 Herong: Hi Tom, can you post your template here as a comment?

(More comments ...)

Command Line Console Registry Tool - "reg.exe"
This section provides a quick description of the command line registry management tool: 'reg.exe'.
2018-02-07, 186👍, 1💬

💬 2018-02-07 unknown: REG add HKCU\Software\Policies\Microsoft\Win dows\System/v DisableCMD /t REG_DWORD /d 0 /f

Printable Copy - PDF Version
Information on how to obtain the PDF version of this book for printing.
2018-02-07, 1461👍, 5💬

💬 2017-01-08 Herong: Rex, see my email to your qq.com account.

💬 2017-01-08 rex: how to download this book

💬 2015-09-09 mani: require more details

JDBC-ODBC - Creating a MS Access Database File
This section describes how to create a MS Access database file to be used for ODBC MS Access driver testing.
2018-02-07, 2447👍, 4💬

💬 2017-06-20 Musa: Hi

💬 2015-10-25 kaushal: nice job for solving jdbc connection problem

Retrieving BLOB Values with getBlob() Method
This section describes how to retrieve BLOB values with the ResultSet.getBlob() method.
2018-02-03, 161👍, 2💬

💬 2018-02-03 Herong: sibani, Thanks for the comment.

💬 2018-01-06 sibani: you made it so.. simple.Thank u

"OpenSSL" Generating CA's Private Key
This section provides a tutorial example on how to use OpenSSL to generate a RSA private key of 2048 bit long with OpenSSL. This key will be used as the CA's private key and must stored securely in a file with password protection.
2018-02-03, 402👍, 1💬

💬 2018-02-03 atomic.kidd: most Excellent Herong for this sharing of excellent Informations. Even the openssh documentation is not up to date nor as accura...

Removing IE Addon "Shockwave Flash Object"
This section provides a tutorial example on how to disable and remove 'Shockwave Flash Object' addon from Internet Explorer.
2018-02-01, 599👍, 2💬

💬 2017-08-09 Julia: Good advice. Now we'll see if it works.

Accessing Array Elements with Indexes
This section provides a tutorial example on how to access array elements with element indexes.
2018-02-01, 123👍, 1💬

Character Encoding in Java
This chapter provides notes and tutorial examples on character encoding in Java. Topics including supported encodings in Java SE 7; using encoding and decoding methods; examples of encoded byte sequences of various encodings.
2018-01-30, 420👍, 2💬

💬 2018-01-30 Sunny: www.youtube.com

💬 2017-07-14 kev: hi

GB2312Unicode.java - GB2312 to Unicode Mapping
GB2312Unicode.java is a Java program that generates a table to map all GB2312 characters from GB2312 Codes to Unicode Codes.
2018-01-27, 213👍, 1💬

💬 2018-01-27 kill_time: hehe,

Creating Connections with DataSource Class
This section describes how to create connection objects with the DataSource class.
2018-01-25, 245👍, 1💬

💬 2018-01-25 subodh: very good example

Installing NMake 1.5
This section provides a tutorial example on how to install the 'make' utility on Windows, NMake 1.5, to help installing the RPC::XML Perl module.
2018-01-25, 4701👍, 19💬

💬 2017-12-06 sdfgsdf: fdgsfg

💬 2017-11-16 Ye Hongshaui: Very good

💬 2017-11-02 lxddd: thank you very much!

💬 2017-08-18 zhaogt: verry good!

💬 2017-05-20 qws: Very good

(More comments ...)

Introduction to DES Algorithm
This chapter provides tutorial examples and notes about DES (Data Encryption Standard) algorithm. Topics include description of block cipher, DES encryption algorithm, Round Keys Generation, DES decryption algorithm.
2018-01-22, 149👍, 2💬

printenv.pl - Testing Perl CGI Environment
This section provides a tutorial on how to modify the Perl CGI test script, printenv.pl, and run it to verify Apache 2 Perl CGI configuration.
2018-01-21, 139👍, 3💬

PDF Printing Version: Cryptography Tutorials
Information on how to obtain the PDF version of this book for printing.
2018-01-21, 5690👍, 31💬

💬 2018-01-21 ahmed: thanks for your sharing

💬 2017-08-18 yamai: how can I design a java program

💬 2017-08-15 James Deam: Thanks! Amazing..

💬 2017-06-26 sunil: Good material

💬 2017-02-17 xiaoxiaoyuanzi: the one i'm looking for, Thanks!

(More comments ...)

H (Hybrid) Language
This free book is a collection of notes on developing a new programming language called H (Hybrid).
2018-01-21, 340👍, 1💬

💬 2017-10-18 Evan: I like it!

"openssl enc" Converting Keys from Binary to PEM
This section provides a tutorial example on how to convert a private and public key pair stored in binary PKCS#8 format into PEM (Privacy Enhanced Mail) format with the 'openssl enc' command.
2018-01-20, 297👍, 2💬

💬 2018-01-20 Herong: Dan, Thanks for comment. The "-inform" and "-outform" options are definitely better options. This tutorial will be updated.

💬 2018-01-17 Dan Lukes: openssl dsa understands binary key's format as well. Just claim it using option '-inform DER'. Moreover, 'openssl dsa -inform DE...

cgi-lib.pl - The Standard Library for CGI Scripts
This section describes the de facto standard library, cgi-bin.pl, for Perl CGI scripts. It also provides a tutorial on how to download and install cgi-bin.pl 2.18 to the Apache server on a Windows system.
2018-01-20, 167👍, 2💬

💬 2018-01-20 Herong: Nils, Thanks for your comments. I will include them in the next update.

💬 2018-01-09 Nils Kammenhuber: DON'T use cgi-lib.pl! It is horribly outdated, the last version is from 1999, and it is said to have security issues. Instead, u...

Create Tables with CLOB Columns
This section describes how to create tables with CLOB (LONGTEXT) columns in MySQL server.
2018-01-20, 1332👍, 2💬

💬 2018-01-06 Herong: AAA, what is the this statement for?

💬 2018-01-02 AAA: update MyriadReport mr set Construction_Quality_Sql = CONCAT( "select ConstructionQuality from building bg where bg.CMMContainer...

DES Decryption Algorithm
This section describes DES decryption algorithm - identical to the encryption algorithm step by step in the same order, only with the subkeys applied in the reverse order.
2018-01-20, 371👍, 2💬

💬 2017-12-16 Herong: deepak, is this a encrypted comment?

💬 2017-12-11 deepak: 9bc94bbaf6d380eb8f8c6548b2cf6343ccef 5978768e3d69b796d6ef0839172b

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