International Association for Cryptologic Research

International Association
for Cryptologic Research

CryptoDB

D\'ecio Luiz Gazzoni Filho

Publications

Year
Venue
Title
2006
EPRINT
Demonstrating data possession and uncheatable data transfer
D\'ecio Luiz Gazzoni Filho Paulo S\'ergio Licciardi Messeder Barreto
We observe that a certain RSA-based secure hash function is homomorphic. We describe a protocol based on this hash function which prevents `cheating' in a data transfer transaction, while placing little burden on the trusted third party that oversees the protocol. We also describe a cryptographic protocol based on similar principles, through which a prover can demonstrate possession of an arbitrary set of data known to the verifier. The verifier isn't required to have this data at hand during the protocol execution, but rather only a small hash of it. The protocol is also provably as secure as integer factoring.

Coauthors

Paulo S. L. M. Barreto (1)