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Chapter 9 Maintenance
Table 189 Log
LABEL
Event
Message
9.11 About
Use this screen to see the ENC's software version, release date and copyright. To open this screen,
click Maintenance > About.
Figure 285 About
The following table describes the fields in this screen.
Table 190 About
LABEL
SoftWare Version
Release Date
Copyright
9.12 Certificate Management
The ENC can use certificates (also called digital IDs) to authenticate users. Certificates are based on
public-private key pairs. A certificate contains the certificate owner's identity and public key.
Certificates provide a way to exchange public keys for use in authentication.
9.12.1 What You Need to Know
When using public-key cryptology for authentication, each host has two keys. One key is public and
can be made openly available. The other key is private and must be kept secure.
These keys work like a handwritten signature (in fact, certificates are often referred to as "digital
signatures"). Only you can write your signature exactly as it should look. When people know what
your signature looks like, they can verify whether something was signed by you, or by someone
else. In the same way, your private key "writes" your digital signature and your public key allows
people to verify whether data was signed by you, or by someone else. This process works as
follows.
Tim wants to send a message to Jenny. He needs her to be sure that it comes from him, and that
1
the message content has not been altered by anyone else along the way. Tim generates a public
key pair (one public key and one private key).
334
DESCRIPTION
This field displays the event type to which the log belongs.
This field states the reason for the log.
DESCRIPTION
This is the ENC's software version.
This is the release date of the said software version.
This shows copyright information such as the year when the software was released
and the name of the company that released it.
ENC User's Guide
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