We propose a modification to the TumbleBit protocol, the off-chain payment hub enabling anonymous transactions among users in the Bitcoin network. Specifically, we modify the first step of the protocol by making the tumbler node sending a P2SH transaction on the blockchain claiming that any user can redeem 1 Bitcoin by providing a SHA-2 preim-age of a value chosen by the Tumbler. We remark that our modification enables Bob to transfer its Bitcoin to a third user, and argue that this modified TumbleBit protocol could find applications in permissioned blockchains, for example in the context of anonymous payments between different banks or fintech companies.

Ferretti, C., Leporati, A., Mariot, L., Nizzardo, L. (2019). Transferable anonymous payments via TumbleBit in permissioned blockchains. In CEUR Workshop Proceedings (pp.56-67). CEUR-WS.

Transferable anonymous payments via TumbleBit in permissioned blockchains

Ferretti, C;Leporati, A;Mariot, L
;
2019

Abstract

We propose a modification to the TumbleBit protocol, the off-chain payment hub enabling anonymous transactions among users in the Bitcoin network. Specifically, we modify the first step of the protocol by making the tumbler node sending a P2SH transaction on the blockchain claiming that any user can redeem 1 Bitcoin by providing a SHA-2 preim-age of a value chosen by the Tumbler. We remark that our modification enables Bob to transfer its Bitcoin to a third user, and argue that this modified TumbleBit protocol could find applications in permissioned blockchains, for example in the context of anonymous payments between different banks or fintech companies.
paper
Anonymous payments, Bitcoin, permissioned blockchain, TumbleBit
English
Distributed Ledger Technology Workshop, DLT 2019
2019
CEUR Workshop Proceedings
2019
2334
56
67
http://ceur-ws.org/
reserved
Ferretti, C., Leporati, A., Mariot, L., Nizzardo, L. (2019). Transferable anonymous payments via TumbleBit in permissioned blockchains. In CEUR Workshop Proceedings (pp.56-67). CEUR-WS.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/255390
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