Encryption and Digital Signature Overview
407
Encryption and Digital Signature Settings
13
Certificate conditions that can be set according to the types of encryption
How to check the certificate settings on Windows
To check the certificate settings, open the certificate file and check the fields on the
[Details] tab against the following.
Certificate Conditions
Valid certificates can only be used. To check the certificate conditions, check [Properties]
>[Security] > [Certificate Management] > [Certificate Details] > [Validity].
Key usage (Only
when this item is
included in the V3
extended area)
Extended key usage (Only
when this item isincluded in
the V3 extended area)
Mail
address
Key
encrypt
ion
Digital
signature
Server
Authenti
caion
Client
authen
ticatio
n
E-mail
protect
ion
Encryption on HTTP
communication fromthe
client to the machine (SSL/
TLSserver)
OO OXXX
Encryption on HTTP
communication from the
machine to an remote
server (SSL/TLS client)
OO XOXX
Encryption usingIPsec X O X X X X
Key encryption [Key usage] includes "Key Encipherment".
Digital Signature [Key usage] includes "Digital Signature".
Server
Authentication
[Extended key usage] includes "Server Authentication".
Client
Authentication
[Extended key usage] includes "Client Authentication".
E-mail Protection [Extended key usage] includes "E-mail Protection".
Mail Address [Subject] includes "E=(E-mail address)", or [Subject alternative name]
includes "RFC822 Name=(E-mail address)".
Validity Status Cause Remedy
Valid The certificate is
valid.
XX
Valid (certificate expires
soon)
The certificate is
valid, but expires
within 1 month.
XX
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