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1. CreateencryptedDCP
Picture
Sound
Subtitle
Encrypted DCP that no-oneelse can read.
2. Create (D)KDM
Encrypted key and detailsof the DCP. Key can onlybe decrypted by the private keyheld by the DKDM's recipient.
DKDM recipient/projectorcertificate
3. Decrypt(D)KDM
4. Make newKDM
DKDMrecipientprivate key
Picture
Sound
Subtitle
Encrypt
Unencrypted data
Random key
KDMrecipient(projector)certificate
KDMfor cinema
Projectorprivate key
Play
3. PlayDCP
Encrypt
Encrypt
Decrypt
Decrypt
Decrypt
Data which mustbe kept secret
Data which can be sent overpublic channels