Ethereum Tutorials - Herong's Tutorial Notes
This free book is a collection of tutorials and notes on Ethereum and blockchain. Topics include Blockchain, Ethereum, Cryptocurrency, Mining, MetaMask, Wallet. 2018-03-11, 251👍, 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, 406👍, 2💬
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💬
"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, 256👍, 2💬
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, 152👍, 2💬
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, 358👍, 2💬
This section provides a quick introduction of the UTF-16LE (Unicode Transformation Format - 16-bit Little Endian) encoding for Unicode character set. UTF-16LE is a variation of UTF-16. 2018-01-18, 4565👍, 6💬
java.time.Duration - Time Durations
This section describes the java.time.Duration class that represents a duration of time measured in seconds with fractions in nanosecond resolution. 2018-01-03, 155👍, 1💬
2-Step Message Encryption - Symmetric and RSA
This section describes how SoapUI performs the SOAP message entryption in 2 steps: encrypt the SOAP message with random secret key and encrypt the secret key with receiver's RSA public key. 2017-12-31, 160👍, 1💬
Variable Declaration and "Dim" Statement
This section provides a quick introduction of what is a variable and how variable can be declared explicitly with a Dim statement and implicitly with an assignment statement. 2017-12-30, 3208👍, 3💬
File_Input_Output_Test.php - File Input/Output Examples
This section provides a tutorial example script on how to use file input and output functions like fopen(), fread(), fwrite(), and fclose(). The example script copies any file in binary mode. 2017-12-28, 144👍, 3💬
OpenSSL Introduction and Installation
This chapter provides tutorial notes and example codes on OpenSSL. Topics include introduction of OpenSSL; installing OpenSSL on Windows systems. 2017-12-24, 682👍, 4💬
Downloading and Editing WSDL Document
This section provides a tutorial example on how to download the WSDL document from the Web service provider. You can change port.address[@location] to a localhost URL to local testing. 2017-12-18, 21710👍, 11💬
This section provides a tutorial example on how to disable and remove 'Lync Browser Helper' addon fr...
This free book contains Herong's notes and tutorial examples on Chinese GB2312 character set. It pro...
This section provides a tutorial example on how to use the getSelection() method to know which butto...
This section provides a quick introduction of Web server log files with examples of IIS and Apache s...
This section describes the MD5 algorithm - a 5-step process of padding of '1000...', appending messa...