X.509 is an standard for a public key infrastructure used for authentication and access control. X.509 specifies standard formats for certificates, revocation lists, attribute certificates, and path validation.
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Extensions for SSL server certificate
I have some question about the X.509 v3 extensions. What extensions should appear in a proper certificate for a SSL server ?
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1answer
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What are the Netscape Cert Type attributes? Why/when are they needed?
What are the Netscape Cert Type attributes in a X.509 Certificate and how are they different with the X509v3 extensions?
Example:
There is the Client/Server Extended Key Usage (X.509) but there is ...
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1answer
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Which key usages are required by each key exchange method?
I'm only really concerned with RSA keys, so the exchange methods are RSA (generate a key, encrypt it, and send it over) and [EC]DHE_RSA (generate an ephemeral [EC]DH key, sign it, and use it for key ...
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1answer
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Which extensions to use for a S/MIME certificate?
Analogously to the SSL server certificate question, which extensions should I use for S/MIME, and should the CA be restricted somehow as well?
(I'm using openssl, which at the moment creates CA and ...
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2answers
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X.509 certificate policies question
I asked another question about certificate policy mappings. This is a different issue. This is about Certificate Policies.
To quote from the X.509 RFC:
In an end entity certificate, these ...
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4answers
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Can an intermediate CA be trusted like a self-signed root CA?
Is it possible within the limits of the X.509 specification to mark an intermediate CA as trusted for a specific purpose, e.g. to verify a VPN, HTTPS etc. server key, just like it would work with a ...
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2answers
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How are possible uses for X.509 (SSL) certificates denoted?
X.509 certificates can be used for servers, clients, email, code signing and more applications. http://twitpic.com/6gdxaq indicates that a certificate can have different of these 'capabilities' on it ...
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1answer
530 views
how do extended validation X.509 certs work?
https://www.forumatic.com/ uses an extended validation cert. wikipedia.org's entry on extended validation certs says that a cert is known to be an extended validation cert if the OID in the ...
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What is the difference between `extendedKeyUsage` and an application policy?
In some Microsoft articles like http://technet.microsoft.com/en-us/library/cc731792%28v=ws.10%29.aspx, I find some confusing statements like
Application policies are sometimes called extended key ...
