Herong's Tutorial Examples

PKI Tutorials - Herong's Tutorial Examples
This tutorial book is a collection of notes and sample codes written by the author while he was learning PKI (Public Key Infrastructure) technologies himself. Topics include Root CA (Certificate Authorities); SSL, TLS, and HTTPS; Server and client authentication processes; Communication data encrypt... 2026-05-06, ≈14🔥, 5💬

💬 2024-11-16 Jay Sarna: Thankyou Dr. Yang. Got it.

💬 2024-11-10 Herong: Hi Jay, I have shared the PDF file with your google account. You should receive a notification with a download link.

💬 2024-10-03 Herong: Hi Jay, I am sorry that you haven't received the PDF file yet. It was sent on Sep 12 to your gmail address. It looks like gmail ...

💬 2024-10-01 Jay Sarna: Request for purchased books ----------------------------- Hello Dr. Yang I hope you are ok. I purchased pdf copy of this book vi...

💬 2016-02-07 john: thanks!

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Lucky Wedding Dates: 2037 - Year of the Snake
Where to find lucky wedding dates for year 2037? Lucky Wedding Dates: 2037 - Year of the Snake ⇒ Lucky Wedding Dates: 2038 - Year of the Horse ⇐ Lucky Wedding Dates: 2036 - Year of the Dragon ⇑ Lucky Wedding Dates: 2031 - 2040 ⇑⇑ Wedding Date - The Most Important Date of Your Life 2021-03-14, ∼4680🔥, 0💬

Chinese Horoscopes - The Monkey
The Monkey Monkeys can run circles around other people with ease. They are curious and clever people who catch on quickly to most anything. Monkey people generally can accomplish any given task. They appreciate difficult or challenging work as it stimulates them and makes them think. Years of the Mo... 2021-10-30, ∼4671🔥, 0💬

native2ascii - Encoding Converter Command and Options
This section describes the native-to-ASCII encoding converter 'native2ascii' and its options. Non-ASCII characters in a Java source file must be converted into \uXXXX Unicode sequences before giving it to the Java compiler. 2024-01-10, ∼4646🔥, 30💬

💬 2024-01-10 ez: Bonjour

💬 2023-07-25 sasa: -~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[];Ì= (ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+([ ].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ó+ ó]+(!''+'...

💬 2023-03-29 asafsas: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2022-11-30 dhidhdi: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2022-08-06 đè: ó=-~É,Ë=É<<É,þ=Ë+~[]

(More comments ...)

科兴生物新冠疫苗 - 生产过程
科兴生物新冠疫苗的生产过程有哪些步骤？科兴生物新冠疫苗的生产过程为：筛选新型冠状病毒株：CZ02株。将病毒接种到非洲绿猴肾细胞（Vero细胞）上。经过培养、收获病毒液。然后灭活病毒、浓缩、纯化和氢氧化铝吸附制成疫苗。 ⇒ 科兴生物新冠疫苗 - 生产能力 ⇐ 科兴生物新冠疫苗 - 保护效力 ⇑ 科兴生物新冠疫苗 - 深度解答 ⇑⇑ 新冠病毒(SARS-C... 2021-07-19, ∼4640🔥, 0💬

Downloading and Installing GNU Unifont
A tutorial example is provided on how to download and install GNU Unifont font family on Windows 7 systems. 2023-07-19, ∼4634🔥, 5💬

💬 2023-07-19 DoublePOOF: thank you

💬 2019-10-23 Sajjad Amin: thank you

💬 2019-07-28 dipen: thank you.

💬 2015-12-06 Herong: D, maybe you can start with What Is Unicode? .

💬 2015-12-05 d gayen: i want to understand what is unicode

Chinese Festivals - Spring Festival
The Spring Festival is the most important festival for the Chinese people and is when all family members get together, just like Christmas in the West. All people living away from home go back, becoming the busiest time for transportation systems of about half a month from the Spring Festival. Airpo... 2021-12-17, ∼4588🔥, 0💬

Shift-JIS Encoding
This section provides a quick introduction of Shift-JIS, also called MS Kanji, encoding, which maps a JIS X0208 character to a 2-byte sequence using a complicated schema designed by Microsoft. 2025-10-22, ∼4568🔥, 11💬

💬 2025-10-22 hammond: チョータノシー

💬 2022-03-12 ddfdfd: hey how are you

💬 2021-12-01 lakshay: what is shift-jis encoding

💬 2020-09-18 Utkarsj: hello hi bye

💬 2020-04-03 Qqqq: スーパー

(More comments ...)

OpenSSL "enc -bf-cbc" for Blowfish/CBC Encryption
Tutorial notes and example codes are provided OpenSSL 'enc -bf-cbc' command for Blowfish encryption in CBC mode. Topics include introduction of CBC (Cipher Block Chaining) cipher operation mode; Literal Key options to specify secret key and IV directly; Salted Key and Random Salt options to specify ... 2022-07-08, ∼4561🔥, 2💬

💬 2020-09-24 ajmal: 123

What Is a Digital Signature?
This section describes what is a digital signature and what is the process of generating and verifying digital signature from a message. 2020-02-23, ∼4558🔥, 4💬

💬 2020-02-23 Herong: Sanjay, you are welcome!

💬 2020-02-17 Sanjay: Thank u so much

💬 2019-01-29 nilo: Hola

💬 2016-04-26 santosh patil: Its easy to understand

Archived: Install ActivePerl v5.8.8 on Windows Systems
This section provides a tutorial example on how to install ActivePerl v5.8.8 on a Windows XP system. 2016-04-02, ∼4552🔥, 1💬

💬 2016-04-02 rimpi: perl

getSelectedItem() - Selected Item of Combo Box
This section provides a tutorial example on how to use the getSelectedItem() method to know which option is selected from a combo box. 2022-10-01, ∼4546🔥, 0💬

EC Key in PEM File Format
This section provides a tutorial example on the EC key PEM file format. EC domain parameters are stored together with the private key. 2023-09-17, ∼4511🔥, 1💬

💬 2023-09-17 ecformat: this is to test EC format

Chinese Horoscopes - The Sheep/Goat Personality
It is lucky that the sheep is ranked eighth in the series of Chinese zodiac animals, for the number "eight" in China is an auspicious one, symbolizing peace and prosperity. Generally speaking, people born in the year of sheep are generous, just and kind, and easily touched by other people's misfortu... 2021-08-07, ∼4500🔥, 0💬

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, ∼4500🔥, 1💬

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

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, ∼4468🔥, 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...

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, ∼4457🔥, 3💬

💬 2014-12-14 Herong: Peter, Yes, you are correct. DIM is an abbreviation for "Declare in Memory", see " Siebel VB Language Reference " published by O...

💬 2014-12-01 Peter: Ehm DIM stands for "dimension"? Or perhaps it's an abbreviation for "Declare in memory"..

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, ∼4452🔥, 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...

Table Column and Row Merge or Span
This section provides a tutorial example on how to merge or span table columns and rows with table-cell[@number-columns-spa nned]and/or table-cell[@number-rows-spanne d]attributes. 2022-11-23, ∼4427🔥, 1💬

💬 2022-11-23 FZW: 感谢您明晰的示例

Illustration of RSA Algorithm: p,q=7,19
This section provides a tutorial example to illustrate how RSA public key encryption algorithm works with 2 small prime numbers 7 and 19. 2016-02-29, ∼4413🔥, 3💬

💬 2015-11-01 Herong: Jun, AES algorithm is added now, see Introduction to AES (Advanced Encryption Standard) .

💬 2015-10-17 Herong: Jun, thank you for pointing out the mistake. I will correct it in the next version. AES will also be included.

💬 2015-10-16 jun: thanks a lot. your book makes everything clear for me except that I have not found a char for AES. By the way, I think "Generati...

Accessing Oracle Server through Web Interface
This section describes how to access an Oracle Server through its Web interface. 2022-11-15, ∼4403🔥, 0💬

Generate secp256k1 Keys with OpenSSL
This section provides a tutorial example on how to generate EC (Elliptic Curve) private and public key pairs using secp256k1 domain parameters. 2023-08-10, ∼4385🔥, 3💬

💬 2023-08-10 emanuel: thanks , it was realz helpfull. can zou tell me how can i encrzpt with btc key some message, because btc use the same secp256k1 ...

"g++ -l..." to Link with Library Files
This section provides a tutorial example on how to use 'g++ -static' and 'g++ -l...' options to link your program with static or dynamic library files. 2026-04-11, ∼4368🔥, 4💬

💬 2026-04-11 piotrek: mama kupa zatkala kran!! pomocy!! wylewa sie

💬 2022-06-20 AA: hello

Differences between "Object" and "Array"
This section provides a quick description of similarities and differences of 'Array' and 'Object'. A tutorial example is provided on how to compare an 'Array' object to an 'Object' object. 2021-02-11, ∼4355🔥, 6💬

💬 2019-09-12 jagdish: test

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