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"update-ca-trust" to Distrust CA Certificate
This section provides a tutorial example on removing user added CA certificates from Trust Store using the 'update-ca-trust' command on Red Hat-based computers. 2026-05-12, ∼246🔥, 0💬

"certtool" Command for Certificates on macOS
This section provides a tutorial example on how to use the 'certtool' command to manage certificates on macOS computers. 2026-05-06, ∼329🔥, 0💬

"security" Command for Keychains on macOS
This section provides a tutorial example on how to use the 'security' command to manage keychains on macOS computers. 2026-05-06, ∼338🔥, 0💬

Using pyOpenSSL for HTTPS Connection
This section provides a tutorial example on using the OpenSSL.SSL module to create an HTTPS connection. 2026-05-06, ∼269🔥, 0💬

"certutil" for NSS Certificate Databases on Linux
This section describes how to use the 'certutil' Command to manage NSS certificate databases on Linux computers. 2026-05-06, ∼346🔥, 0💬

Root CA Certificate Location on Linux
This section provides a quick introduction of root CA certificate location on Linux computer. 2026-05-06, ∼365🔥, 0💬

update-ca-certificates Command on Ubuntu
This section describes how to use the update-ca-certificates Command to manage trusted root CA certificates on Ubuntu computers. 2026-05-06, ∼275🔥, 0💬

update-ca-trust Command on CentOS
This section describes how to use the update-ca-trust Command to manage trusted root CA certificates on CentOS computers. 2026-05-06, ∼278🔥, 0💬

Linux Certificate Stores and Tools
This chapter provides tutorial notes and example codes on Linux Certificate stores and tools. Topics include root CA certificate location; 'update-ca-certificates' and 'update-ca-trust' commands to main trusted root CA certificates; 'certutil' command to manage NSS certificate database for Firefox a... 2026-05-06, ∼310🔥, 0💬

What Is PKCS12 File Format
This section describes the PKCS12 File Format, which can be used to store multiple cryptography objects, including private/public keys and certificates, in a single file. 2025-10-07, ∼467🔥, 1💬

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Certificate Wrapped in PKCS7 Formats
This section provides a quick introduction of the certificate PKCS7 file format, which wraps one or more certificates under a single ASN.1 structure. 2024-12-14, ∼353🔥, 0💬

Certificate Wrapped in PKCS12 Formats
This section provides a quick introduction of the certificate PKCS12 file format, which wraps one or more certificates with/without associated key pairs under a single ASN.1 structure. 2024-12-14, ∼353🔥, 0💬

Certificate File Format Summary
This section provides a summary of 5 commonly used file formats of PKI certificates: DER, PEM, PKCS7 Binary, PKCS7 Text, and PKCS12. 2024-12-14, ∼315🔥, 0💬

PKI Certificate 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 certificate related technologies. Topics include PKI architecture and CA (Certificate Authorities); PKI certificate types and DER/PEM file formats; Certificate tools: OpenSSL and 'keytool'; C... 2024-11-27, ∼913🔥, 0💬

"openssl.cnf" Example and Usages
This section describes OpenSSL CA database files, including the primary database file 'index.txt' and the serial number file 'serial'. 2024-11-27, ∼938🔥, 0💬

Certificate Data Fields and X.509 Standard
This section describes the structure and data fields of PKI certificates, which are specified in RFC 5280 based on the X.509 standard. 2024-11-27, ∼858🔥, 0💬

"openssl pkcs12 -export" - Certificate Chain and Key Bundle
This section provides a tutorial example on how to create a PKCS12 bundle to store an end certificate, its private/public key pair, and the signing certificate, using the 'openssl pkcs12 -export' command. 2024-11-27, ∼837🔥, 0💬

Add "keyUsage" into Root CA
This section provides a tutorial example on how to add 'keyUsage' and other X509v3 extensions to a self-signed root CA certificate. 2024-11-27, ∼609🔥, 0💬

OIDs Used in PKI Certificate
This section introduces OIDs (Object IDentifiers) used in PKI certificates to represent attribute names and predefined reference values. 2024-11-27, ∼531🔥, 0💬

openssl.cnf - OpenSSL Configuration File
This section describes the 'openssl genpkey -algorithm RSA' command, which generates a RSA private/public key pair. It replaces the old 'openssl genrsa' command 2024-11-27, ∼517🔥, 0💬

What Is BER (Basic Encoding Rules)
This section introduces the BER (Basic Encoding Rules) defined in the ASN.1 standard. It uses the TLV (Tag-Length-Value) format to encode a value of a given data type. 2024-11-27, ∼429🔥, 0💬

Java "keytool" Commands and KeyStore Files
This chapter provides tutorial notes and example codes on the Java 'keytool' command. Topics include introduction of KeyStore file and 'keytool' command; generating and managing keys and self-signed certificates; exporting and importing certificates; generating CSR (Certificate Signing Request); sig... 2024-11-27, ∼415🔥, 0💬

Export Key Pair using "keytool -importkeystore"
This section provides a tutorial example on how to export a private/public key pair from a KeyStore file using the 'keytool -importkeystore'. 2024-11-27, ∼409🔥, 0💬

OpenSSL CA Database Files
This section describes OpenSSL CA database files, including the primary database file 'index.txt' and the serial number file 'serial'. 2024-11-27, ∼406🔥, 0💬

< 1 2 3 4 5 6 7 … > >>   ∑:316  Sort:Rank

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