Re: Expired certificates

[vachanta () gmail com]

> Can anyone give me a reason why an unused but >expired certificate could cause a security ...

Assuming you are referring to SSL certs here.

AFAIK there is no risk involved if its unused,but if it being actively used by average users.

Then Users will be confronted with expired SSL cert warnings on a regular basis will become conditioned to ignore them 
and they will/can ignore any other "real" warnings like MITM messages as well.

so its a good idea to renew expired SSL certs if its a production server

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