No, decryption keys are tightly held and inaccessible to general populations and small manufacturers and those used by illicit capture cards are regularly revoked iirc.
In regards to that, i assume that manufacturers have to apply for a cert for their device and then embed that cert, correct? Then if the device is found to be stripping HDCP the consortium can revoke that cert, but how? Sure you can do it for PCs and consoles, but are blu-ray players connected to the internet and auto-updated nowadays? Otherwise it'd be pretty easy for Chinese manufactures out of reach of the DMCA to just release one every few years and have it work for all devices prior.
"are blu-ray players connected to the internet and auto-updated nowadays?"
Some blu-rays force you to update before you can watch them. Also, the key revocation lists can (I believe) be included in the blu-ray itself to make them work offline, too.
yes, keys can be revoked [in offline players] by inserting a newer disc with a newer version of the "media key block." wikipedia suggests they're up to version 78 of that data.
