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Author Topic: KDM trouble: invalid signature Nader Ali Film Handler Posts: 1 From: Copenhagen, Copenhagen / Nørrebro, Denmark Registered: Dec 2013 posted 10-01-2014 05:48 AM                     I'm not even sure I know how to formulate my question, let alone understand any answers you guys might have - but I'll give it a go. When loading the KDMs i get this message: ”Invalid signature – could not verify KDM signature”. Usually I get only one kdm-file, but for this particular film (with only one screening) I got 2 zipped packages, each containing three files: Package 1 cert_chain_Dolby256-CAT862-619620.pem.75848e20-2711-4abf-8121-787470219446.kdm cert_Dolby256-CAT862-619620.der.crt.1fc08a43-02e8-4f46-9979-aa007b36044f.kdm cert_Dolby256-CAT862-619620.pem.crt.e62609fa-bc51-4c7b-bc43-5abbd64fc813.kdm Package 2 cert_chain_Dolby256-CAT862-619620.pem.3a03b91f-a5fd-4351-aa6f-c4c2bcb05f3e.kdm cert_Dolby256-CAT862-619620.der.crt.dab05ff5-8d05-47c9-85ef-ba2469903afa.kdm cert_Dolby256-CAT862-619620.pem.crt.b5a0bccf-8824-4a56-bc8a-b13db449c66c.kdm Does anyone here know what might be the problem? Here's a pic with one of the six error messages from the dolby server. Thank you for your time, Nader  |  IP: Logged Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 10-01-2014 01:29 PM                     Whoever issued the KDM screwed up. I've seen similar problems when independent film producers bypass the major distributors here (who have pretty much figured out KDMs) and make their own DCPs and KDMs using Cineasset or something else. I believe the "signature" should be verified by a trusted issuer, you can "self sign" stuff but that's considered insecure.  |  IP: Logged

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