PPT Slide
Adobe WebBuy (PDF Merchant)
- License (.RMF file) is required to open the document
- License consist of:
- Signed certificate with Publisher’s RSA Public key
- One or more pairs of some ID (like CPU ID, USER ID, UTC, …) and encrypted document key, associated with that ID. Different pairs are combined with “AND” and “OR” operators
- Document permissions
- Data to check license validity
- Two RSA Public keys owned by Adobe (1024 bit and 912 bit in length) are involved in license verification and document key calculation
- It is impossible to generate valid certificate without having access to RSA Private keys, owned by Adobe
- It is possible to calculate document key and decrypt the document if both PDF and matching RMF file are available
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