CSS Signature Detection Clause Samples

CSS Signature Detection. To validate a CSS Signature the detecting device generates a Keyed Media Fingerprint (“Fk”) for the DVD Disc Title to be played back, as described above. Then the device extracts the key index (i) from the CSS Signature to determine which entry in the set of ECDSA public keys (“CSSpub[1…16]”) to use to verify the 320-bit signed portion (SigF) of the CSS Signature as defined in the expression below: