Android ASP Astrology Big5 Bitcoin Blowfish Built-in C# Calendar CD-DVD Cheminformatics Chinese Cryptography DES Email Encoding Ethereum Flash GB2312 General H Herong History HTML Java JavaScript JDBC JSP JVM Linux Molecule Movie Music MySQL Neural Network Perl PHP Physics PKI Publication Python REST SOAP Sorting Swing TV Series UML Unicode VBScript Web Web-Services Windows WSDL XML XMLPad XSD XSL-FO

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Configuring PHP OpenSSL on Windows
This section provides a tutorial example on how to install and configure the PHP OpenSSL module on Windows systems. PHP OpenSSL is provided as a DLL file called php_openssl.dll. 2020-05-21, ≈56🔥, 14💬

💬 2020-05-21 Herong: GHM, can you check if php_openssl.dll actually exists in the extension_dir folder?

💬 2020-05-19 GHM: I am totally new to php. How do I activate openssl so php can access functions. I installed php manager and it said that php_ope...

💬 2020-01-21 Herong: Nietzsche, can you provide the logic for the hasMeaning() function?

💬 2020-01-12 Nietzsche: Life is Meaningless: Input 1: if (Life::hasMeaning(self) === True) { echo "Life has Meaning"; } else { echo "Life is Meaningless...

💬 2019-10-09 Michael: Thank you! This helped me enable SSL on my PHP install

(More comments ...)

Listing of Trusted Root CA in Google Chrome
This section provides a tutorial example on how to see the list of trusted root CA (PKI Authorities) pre-installed in Google Chrome. 2016-09-16, ≈14🔥, 1💬

💬 2016-09-16 Pooja Shukla: good

"bad decrypt:./crypto/evp/evp_enc.c:461" Error
This section provides a tutorial example on why OpenSSL 'pkcs12' failed with 'bad decrypt:./crypto/evp/evp_enc.c :461'error. The root cause is the key password different than file password. 2015-09-10, ≈10🔥, 1💬

💬 2015-09-10 Action Here: this totally helped me.

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. 2021-12-27, ∼7537🔥, 6💬

💬 2021-09-23 Kuro: nice

💬 2019-05-14 dsdsdasd: Naaaaa

💬 2017-11-30 naveed: nice!!

💬 2017-09-28 Irtza: ok

Archived: Windows XP Component "Update Root Certificates"
This section describes the process used by Windows XP component, Update Root Certificates, to communicate to Windows Update Website to fetch a trusted root certificate and install in on the local computer automatically. 2020-06-08, ∼6851🔥, 4💬

💬 2020-06-08 Herong: Onur, If the error is cause by IE auto-updating root certificate, you can download and install the missing root certificate manu...

💬 2020-06-01 Onur: Hi there, Since last a few weeks, although I have XP SP3 and the most recent crypt32.dll versioned 5.131.2600.6459, I get numero...

💬 2019-04-13 Herong: Leo, can you run the "certmgr" command on your Windows XP? It provides functions to install root certificates to your computer.

💬 2019-04-08 Leo: I know this article is outdated, but I'm still looking for a way to update the 'Root certificates' in Windows XP SP3, by install...

Using openConnection() Method in java.net.URL Class
This section provides a tutorial example on how to use the openConnection() method in the java.net.URL class to perform a GET method on an HTTPS server. Java Secure Socket Extension (JSSE) works quietly behind the java.net.URL class to provide HTTPS support. 2022-07-08, ∼6498🔥, 3💬

💬 2015-08-05 ashkart: doesnt work indeed. Connection type got, connection object got too. But then there is an exception "java.net.ConnectException: C...

💬 2015-08-05 ashkart: sorry, works fine, i forgot i'm behind the proxy...

"trust extract" - Extract Certificates from Linux Trust Store
This section provides tutorial examples on extracting certificates from Linux Trust Store using the 'trust extract' command. 2026-05-12, ∼6248🔥, 0💬

"trust dump" - Dump Information from Linux Trust Store
This section provides tutorial examples on dumping certificate information from Linux Trust Store using the 'trust dump' command. 2026-05-12, ∼6157🔥, 0💬

"trust anchor" - Add and Remove Certificates.
This section provides tutorial examples on adding and removing certificate information in Linux Trust Store using the 'trust anchor' command. 2026-05-12, ∼6124🔥, 0💬

ca-certificates - Linux CA Certificate Package
This chapter provides tutorial notes and example codes on the Linux CA Certificate Package. Topics include installing Mozilla trust root certificates with the 'ca-certificates' package; installing 'ca-certificates-java' and 'ca-certificates-mono' for Java and Mono (.NET) applications; adding and rem... 2026-05-12, ∼6051🔥, 0💬

HTTPS Request and Response Example
This section describes an example of HTTPS request and response captured by a Perl script using the Crypt::SSLeay module. 2023-08-09, ∼5579🔥, 4💬

💬 2023-08-09 hohl: dthdfgh

💬 2020-04-29 james: alert('cum')

💬 2019-07-13 xss: HI

RDP Server Certificate Location
This section provides a tutorial example on how to locate the RDP server certificate in the 'Remote Desktop' certificate store under the 'Computer Account' using the 'certlm.msc' command. 2022-10-01, ∼4339🔥, 0💬

Creating a Digital ID and Sign Word Documents
This section provides a tutorial example on how to create a your own digital ID and use it to add a digital signature to a MS Word 2007 document. 2018-03-25, ∼4288🔥, 2💬

💬 2018-03-15 Herong: Laurenson, Word 2013 has removed the function to create your own test digital ID. You can go to Comodo to get real digital ID fo...

💬 2018-03-13 Laurenson: this is very helpful but I want to know how to create my own digital ID using Microsoft Office 2013

Exporting a List of Root CA Certificates
This section provides a tutorial example on how to export a list of trusted root CA certificates with the certificates console on a Windows system. 2022-06-28, ∼3920🔥, 3💬

💬 2022-06-28 confused: ?????????????????

💬 2018-03-13 Michael Knoy: Finally someone who knows their shit! Over 20 years on the net and you have some of the best straight forward info. Thank You Ve...

💬 2017-03-28 Josh: Just what I needed. Thank you!

Full Version in PDF/EPUB
Information on how to obtain the full version of this book in PDF, EPUB, or other format. 2026-08-23, ∼3878🔥, 13💬

💬 2026-08-23 Lara: Thanks

💬 2017-04-21 Herong: Dzung, you should have it in your email box now. Thanks.

💬 2017-04-20 Dzung Nguyen: Dr. Herong; I really enjoy your books. I donated $5 through PayPal. Would you let me know where I can download this PKI Tutorial...

💬 2016-12-06 zhaojie: thanks,i'm learning http ,so to know https !

💬 2016-10-18 ItslSteven: thanks

(More comments ...)

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, ∼3812🔥, 3💬

💬 2017-11-15 amal: third visit

💬 2016-04-29 amal: second visit

💬 2016-04-29 amal: first visit

javax.net.ssl.trustStore System Property
This section provides a tutorial example on how Java uses the default trusted KeyStore file, if the system property, javax.net.ssl.trustStore, is not specified. 2022-12-26, ∼3498🔥, 1💬

Introduction of PKI (Public Key Infrastructure)
This chapter provides a quick introduction of PKI (Public Key Infrastructure). Topics include what is PKI; usage examples of PKI; most popular certificate authorities. 2016-02-22, ∼3124🔥, 2💬

💬 2016-02-22 Charlie Beebout: Thank you. I am looking forward to familiarizing myself with security issues.

Installing Crypt::SSLeay 0.72 on Windows
This section provides a tutorial example on how to install Crypt::SSLeay 0.72 for ActiveState Perl on Windows systems. 2022-04-01, ∼3045🔥, 2💬

💬 2016-05-05 rodman: Thanks I sure hope this helps me.

Windows Automatic Root Update Mechanism
This section describes the automated process used by Windows to communicate to Windows Update Website to fetch a trusted root certificate and install it on the local computer, whenever the root certificate is needed. 2020-06-08, ∼2940🔥, 2💬

💬 2020-06-08 Herong: Onur, the question at the end of your comment was not very clear. Can you rephrase it in a different way?

💬 2020-06-05 Onur: Actually, this auto update mechanism is present on older Windows versions as low as XP. See the article here on this site: Outda...

Exporting Root Certificate to File from macOS
This section provides a tutorial example on how to export a trusted root CA certificate pre-installed on macOS computer into a certificate file in binary .cer format. 2022-01-30, ∼2742🔥, 2💬

💬 2022-01-30 Herong: Johan, Thank you so much for sharing this!

💬 2022-01-29 Johan: A better way to do the export programatically and avoid GUI clicking is to use the "security" program and export the root- and s...

Adding Security Exception in Mozilla Firefox
This section provides a tutorial example on how to add a security exception in Mozilla Firefox to continue visiting an HTTPS Website with an un-trusted certificate. 2023-05-09, ∼2732🔥, 3💬

💬 2023-05-09 Matti Ollikainen: The same os is now installed on usb sticks. In one of them, Firefox displays a web page as insecure but allows an security excep...

Using openStream() Method in java.net.URL Class
This section provides a tutorial example on how to use the openStream() method in the java.net.URL class to perform a GET method on an HTTPS server. Java Secure Socket Extension (JSSE) works quietly behind the java.net.URL class to provide HTTPS support. 2017-05-23, ∼2687🔥, 2💬

💬 2017-05-23 Herong: Mike, the issue could be that Yahoo Finance server is expecting some standard HTTP request headlines this Java program is not pr...

💬 2017-05-22 Mike: when I run the above java program with the following argument, I got a 401. If I directly paste the same https link to a web bro...

Export Server Certificate to File from Safari
This section provides a tutorial example on how to export an HTTPS server certificate from Apple Safari to a certificate file on macOS computer. 2022-10-01, ∼2680🔥, 0💬

1 2 3 4 5 6 … > >>   ∑:315  Sort:Date

Android ASP Astrology Big5 Bitcoin Blowfish Built-in C# Calendar CD-DVD Cheminformatics Chinese Cryptography DES Email Encoding Ethereum Flash GB2312 General H Herong History HTML Java JavaScript JDBC JSP JVM Linux Molecule Movie Music MySQL Neural Network Perl PHP Physics PKI Publication Python REST SOAP Sorting Swing TV Series UML Unicode VBScript Web Web-Services Windows WSDL XML XMLPad XSD XSL-FO