NetBill Security and Transaction Protocol
Benjamin Cox, J. D. Tygar, and Marvin Sirbu
Carnegie Mellon University
NetBill is a system for micropayments for information goods on the
Internet. This paper presents the NetBill protocol and describes its
security and transactional features. Among our key innovations are:
- An atomic certified delivery method so that a customer pays if and
only if she receives her information goods intact.
- Outsourcing access control: different users can use different
access control servers.
- A credential mechanism allowing users to prove membership in
groups. This supports discounts.
- A structure for constructing pseudonyms to protect the identities
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