International Business Machines Corporation
Defensible disposition of data

Abstract:

An example operation may include one or more of connecting, by a disposition node, to a blockchain comprised of a plurality of user nodes connected to a plurality of device nodes that store user data of the plurality of the user nodes, receiving, by the disposition node, a request from a user node of the plurality of the user nodes to dispose of user data (D) on at least one of the device nodes of the plurality of the device nodes, the request contains a disposal policy (P) and a disposal method (M) of the D, executing, by the disposition node, a consensus algorithm to validate the request based on the D, P and M, in response to a validation of the request, accessing, by the disposition node, the D on the at least one of the device nodes of the plurality of the device nodes, generating, by the disposition node, a location sensitive hash of the D (LSH(D)) and a crypto hash of the D (SHA256(D)), storing, by the disposition node, the LSH(D), the SHA256(D), the P and the M on the blockchain, executing, by the disposition node, a smart contract to dispose of the D on the at least one of the device nodes of the plurality of the device nodes by the M based on the P, and recording an execution of the smart contract on the blockchain.