Verifying A Certificate - ZyXEL Communications NWA90AX User Manual

• Binary PKCS#12: This is a format for transferring public key and private key certificates.The private key
in a PKCS #12 file is within a password-encrypted envelope. The file's password is not connected to
your certificate's public or private passwords. Exporting a PKCS #12 file creates this and you must
provide it to decrypt the contents when you import the file into the Zyxel Device.
Note: Be careful not to convert a binary file to text during the transfer process. It is easy for this
to occur since many programs use text files by default.

14.1.3 Verifying a Certificate

Before you import a trusted certificate into the Zyxel Device, you should verify that you have the correct
certificate. You can do this using the certificate's fingerprint. A certificate's fingerprint is a message
digest calculated using the MD5 or SHA1 algorithm. The following procedure describes how to check a
certificate's fingerprint to verify that you have the actual certificate.
Browse to where you have the certificate saved on your computer.
1
Make sure that the certificate has a ".cer" or ".crt" file name extension.
2
Double-click the certificate's icon to open the Certificate window. Click the Details tab and scroll down
3
to the Thumbprint Algorithm and Thumbprint fields.
Use a secure method to verify that the certificate owner has the same information in the Thumbprint
4
Algorithm and Thumbprint fields. The secure method may vary based on your situation. Possible
examples would be over the telephone or through an HTTPS connection.
Chapter 14 Certificates
NWA50AX/NWA90AX/NWA55AXE Series User's Guide
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