ZyXEL Communications P-660HN-F1 manual 205

	Chapter 12 Certificates
Table 75 Trusted Remote Host Details (continued)
LABEL	DESCRIPTION
Version	This field displays the X.509 version number.
Serial Number	This field displays the certificate’s identification number given by the device
	that created the certificate.
Subject	This field displays information that identifies the owner of the certificate, such
	as Common Name (CN), Organizational Unit (OU), Organization (O) and
	Country (C).
Issuer	This field displays identifying information about the default self-signed
	certificate on the ZyXEL Device that the ZyXEL Device uses to sign the trusted
	remote host certificates.
Signature Algorithm	This field displays the type of algorithm that the ZyXEL Device used to sign the
	certificate, which is rsa-pkcs1-sha1 (RSA public-private key encryption
	algorithm and the SHA1 hash algorithm).
Valid From	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.
Valid To	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.
Key Algorithm	This field displays the type of algorithm that was used to generate the
	certificate’s key pair (the ZyXEL Device uses RSA encryption) and the length
	of the key set in bits (1024 bits for example).
Subject Alternative	This field displays the certificate’s owner‘s IP address (IP), domain name
Name	(DNS) or e-mail address (EMAIL).
Key Usage	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.
Basic Constraint	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.
MD5 Fingerprint	This is the certificate’s message digest that the ZyXEL Device calculated using
	the MD5 algorithm. You cannot use this value to verify that this is the remote
	host’s correct certificate because the ZyXEL Device has signed the certificate;
	thus causing this value to be different from that of the remote host’s correct
	certificate. See Section 12.6.3 on page 209 for how to verify a remote host’s
	certificate.
SHA1 Fingerprint	This is the certificate’s message digest that the ZyXEL Device calculated using
	the SHA1 algorithm. You cannot use this value to verify that this is the remote
	host’s correct certificate because the ZyXEL Device has signed the certificate;
	thus causing this value to be different from that of the remote host’s correct
	certificate. See Section 12.6.3 on page 209 for how to verify a remote host’s
	certificate.
Certificate in PEM	This read-only text box displays the certificate or certification request in Privacy
(Base-64) Encoded	Enhanced Mail (PEM) format. PEM uses 64 ASCII characters to convert the
Format	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).
Back	Click this to return to the previous screen without saving.
Export	Click this 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.

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P-660HN-F1 User’s Guide