Glossary

The JMS- and MQ-related terms defined here are used throughout this document.

asymmetric algorithms

The cryptography algorithms that use one key for encryption and a different key for decryption. One of these must be kept secret, but the other can be public.

broker

A WebSphere MQ process that performs subscription resolution in a publish/subscribe model.

channel

A WebSphere MQ object that is a logical communication link.

CipherSpec

The WebSphere MQ combination of encryption algorithm and hash function applied to an SSL message after authentication completes.

cipher suite

A set of cryptographic algorithms used by an SSL connection.�

cluster

A network of queue managers that are logically associated in some way. �

cluster queue

A WebSphere MQ queue hosted by a cluster queue manager and made available to other queue managers in the cluster.�

cluster queue manager

A WebSphere MQqueue manager that is a member of a cluster�.

cryptography

The process of converting readable text, called plain text, and an unreadable form, called cipher text.�

decryption

The process of converting cipher text messages back to their plain text form.

digital certificate

Provides protection against impersonation. A digital certificate binds a public key to its owner, whether that owner is an individual, a queue manager, or some other entity.

durable subscription

A JMS subscription that retains messages while a client is disconnected.

encryption

The process that converts a plain text message to cipher text.

full repository

A WebSphere MQ queue manager that hosts a complete set of information about every queue manager in the cluster.�

JMS

Java Message Service.

key repository

The store for digital certificates and their associated private keys.�

local queue manager

A WebSphere MQqueue manager that an application connects to.�

messaging client

A JMS application that produces or consumes messages.

MQ

WebSphere MQ, the message-oriented middleware provided by IBM.

MQ publish/subscribe

WebSphere MQ publish-and-subscribe function.

MQI

WebSphere MQ message queue interface programming API.

MQM

WebSphere MQ message queue manager process that manages a queue.

nondurable subscription

A JMS subscription that retains messages only while a client is connected.

partial repository

In WebSphere MQ, refers to the queue managers in the cluster, which inquire about the information in the full repositories and build up their own subsets.�

payload

A WebSphere MQ message body.

private key

The secret key that must be kept secret in asymmetric algorithms.�

public key

The secret key that can be public in asymmetric algorithms.

publication

In WebSphere MQ, the information that is sent by a publisher.

publisher

In WebSphere MQ, the sender in a publish/subscribe model.

queue

In JMS, a domain for point-to-point messaging.

In WebSphere MQ, an object that stores sent messages.

remote queue manager

In WebSphere MQ, a different queue manager from the one the application is connected to. �

RF header

The WebSphere MQ rules and formatting header used by MQ publish/subscribe. All messages sent to the MQ publish/subscribe broker or to the stream queue must have an RF header. The RF header conveys control information to the MQ publish/subscribe broker. In MQ publish/subscribe messages, the message payload contains a RF header, followed by the application data.

RFH

The WebSphere MQ rules and formatting header; the portion of the message header that provides rules and formatting information for that message

service provider

A Tibco JMS message provider. For instance, Tibco JMS is a service provider, called a messaging provider in this document.

SSL

An industry standard protocol for transmitting data in a secure manner over an unsecured network.�

shared key

The same secret key used by symmetric algorithms.

stream

In WebSphere MQ, the grouping of related MQ topics.

subscriber

In WebSphere MQ, the receiver in a publish/subscribe topology.

subscription

A Tibco JMS domain for publishing or consuming one-to-many messaging.

symmetric algorithms

Cryptography algorithms that require both parties to use the same secret key.

topic

In Tibco JMS, similar to queues, but used for one-to-many messaging.

In WebSphere MQ, the subject of a publication. WebSphere MQ publish/subscribe topics and JMS topics are different. In JMS, a topic is a publish/subscribe endpoint, whereas in WebSphere MQ, publish/subscribe topics and JMS topics are different.