JDK Tutorials - Herong's Tutorial Examples - v6.32, by Herong Yang
Certificates and Certificate Chains
This section describes certificate and certificate chain. A certificate contains someone's public key signed by a trusted authority.
What is Certificate: A certificate is digitally signed statement from the issuer saying that the public key of the subject has some specific value.
The above definition is copied from the JDK documentation. It has a couple of important terms:
X.509 Certificate - A certificate written in X.509 standard format. X.509 standard was introduction in 1988. It requires a certificate to have the following information:
How can you get a certificate for your own public key?
What is Certificate Chain: A certificate chain is a series of certificates that one certificate signs the public key of the issuer of the next certificate. Usually the top certificate (the first certificate) is self-signed, where issuer signed its own public key.
Table of Contents
Date, Time and Calendar Classes
Date and Time Object and String Conversion
Number Object and Numeric String Conversion
Locales, Localization Methods and Resource Bundles
Calling and Importing Classes Defined in Unnamed Packages
HashSet, Vector, HashMap and Collection Classes
Character Set Encoding Classes and Methods
Encoding Conversion Programs for Encoded Text Files
Datagram Network Communication
DOM (Document Object Model) - API for XML Files
DTD (Document Type Definition) - XML Validation
XSD (XML Schema Definition) - XML Validation
XSL (Extensible Stylesheet Language)
Message Digest Algorithm Implementations in JDK
Private key and Public Key Pair Generation
PKCS#8/X.509 Private/Public Encoding Standards
Digital Signature Algorithm and Sample Program
►"keytool" Commands and "keystore" Files
►Certificates and Certificate Chains
"keytool" - Key and Certificate Management Tool
"keytool -genkeypair" - Generating Keys and Self-Signed Certificates
"keystore" File Type: PKCS12 and JKS
"keytool -export/import" - Exporting and Importing Certificates
"keytool -keyclone" - Cloning Certificates with New Identities
KeyStore and Certificate Classes
Secret Key Generation and Management
Cipher - Encryption and Decryption
The SSL (Secure Socket Layer) Protocol
SSL Socket Communication Testing Programs