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1. (WO2018039722) DYNAMIC ACCESS CONTROL ON BLOCKCHAIN

Pub. No.:    WO/2018/039722    International Application No.:    PCT/AU2017/050928
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Thu Aug 31 01:59:59 CEST 2017
IPC: H04L 9/32
Applicants: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION
Inventors: STAPLES, Mark
RIMBA, Paul
Title: DYNAMIC ACCESS CONTROL ON BLOCKCHAIN
Abstract:
This disclosure describes dynamic access control using capabilities (via dynamic access control interface (150)) on a blockchain system (180). The blockchain data structure is a time- stamped list of blocks, chained together cryptographically. In this disclosure, capabilities can be recorded on a blockchain system (via capabilities storage (170)) and thus access propagation is known. This makes revocation of access achievable by recording a new transaction, which in effect removes the previous authorization. There will be no change to transaction history and instead a new transaction records (170) the current status of the capability. An example implementation on a blockchain system (180) is given in Ethereum, which allows programs called "smart contracts" to run as transactions.