2.2.3.2.40 SIGNATURE When Used Under the CONTENTREVOCATION or LICENSORINFO Element
The <SIGNATURE> element is used within the <CONTENTREVOCATION> (section 2.2.3.2.14) and <LICENSORINFO> (section 2.2.3.2.24) elements. The <SIGNATURE> element contains a signature of the <DATA> element when used within the <CONTENTREVOCATION> and <LICENSORINFO> elements in the <VALUE> child element.
The content public key is signed by the license server. This signature is created using ECDSA over curve ECC1. For more information about ECDSA, see [ELLIPTICCURVE-DSA]. This prevents messages about the revoked license from being altered by an external agent.
Cryptographic sequence:
<VALUE> contents = ["<DATA>" | <DATA> element contents | "</DATA>"]KL