ZyXEL Communications ZyWALL 1050 User Manual page 486

ZyWALL 1050 User's Guide
Table 166 Trusted Certificates Edit Screen (continued)
LABEL
Subject
Issuer
Signature Algorithm
Valid From
Valid To
Key Algorithm
Subject Alternative
Name
Key Usage
Basic Constraint
MD5 Fingerprint
SHA1 Fingerprint
Certificate in PEM
(Base-64) Encoded
Format
Export Certificate
OK
Cancel
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DESCRIPTION
This field displays information that identifies the owner of the certificate, such as
Common Name (CN), Organizational Unit (OU), Organization (O) and Country
(C).
This field displays identifying information about the certificate's issuing
certification authority, such as Common Name, Organizational Unit,
Organization and Country.
With self-signed certificates, this is the same information as in the Subject
Name field.
This field displays the type of algorithm that was used to sign the certificate.
Some certification authorities use rsa-pkcs1-sha1 (RSA public-private key
encryption algorithm and the SHA1 hash algorithm). Other certification
authorities may use rsa-pkcs1-md5 (RSA public-private key encryption algorithm
and the MD5 hash algorithm).
This field displays the date that the certificate becomes applicable. The text
displays in red and includes a Not Yet Valid! message if the certificate has not
yet become applicable.
This field displays the date that the certificate expires. The text displays in red
and includes an Expiring! or Expired! message if the certificate is about to expire
or has already expired.
This field displays the type of algorithm that was used to generate the
certificate's key pair (the ZyWALL uses RSA encryption) and the length of the
key set in bits (1024 bits for example).
This field displays the certificate's owner's IP address (IP), domain name (DNS)
or e-mail address (EMAIL).
This field displays for what functions the certificate's key can be used. For
example, "DigitalSignature" means that the key can be used to sign certificates
and "KeyEncipherment" means that the key can be used to encrypt text.
This field displays general information about the certificate. For example,
Subject Type=CA means that this is a certification authority's certificate and
"Path Length Constraint=1" means that there can only be one certification
authority in the certificate's path.
This is the certificate's message digest that the ZyWALL calculated using the
MD5 algorithm. You can use this value to verify with the certification authority
(over the phone for example) that this is actually their certificate.
This is the certificate's message digest that the ZyWALL calculated using the
SHA1 algorithm. You can use this value to verify with the certification authority
(over the phone for example) that this is actually their certificate.
This read-only text box displays the certificate or certification request in Privacy
Enhanced Mail (PEM) format. PEM uses 64 ASCII characters to convert the
binary certificate into a printable form.
You can copy and paste the certificate into an e-mail to send to friends or
colleagues or you can copy and paste the certificate into a text editor and save
the file on a management computer for later distribution (via floppy disk for
example).
Click this button and then Save in the File Download screen. The Save As
screen opens, browse to the location that you want to use and click Save.
Click OK to save your changes back to the ZyWALL. You can only change the
name.
Click Cancel to quit and return to the Trusted Certificates screen.
Chapter 33 Certificates