PPT Slide
Adobe’s Acrobat eBookReader (formerly GlassBook)
- Implements Electronic Book Exchange (EBX) protocol
- RSA keys pair is generated during activation
- Public key is registered on content server, while Private is retained by Reader
- Document key encrypted by Public key and stored in Voucher
- Voucher contains information about document permissions, expiration, …
- Voucher is signed with HMAC protocol
Related Internet resources:
- Voucher could not be falsified without knowing the Document key
- Document key could not be calculated without knowing the Private key
- Private key is stored somewhere on local computer
- After obtaining the Document key it is very easy to create Voucher with any permissions and for any computer