查看文章

The inherent immutability offered by Blockchains (BC) ensures resilience against modification or removal of the stored data. In large scale networks like the Internet of Things (IoT), however, this feature significantly increases BC storage size and raises privacy concerns. In this paper, we propose a Memory Optimized and Flexible BC (MOF-BC) that enables the IoT users and service providers to remove or summarize their transactions and age their data and thus exercise their “right to be forgotten”. To increase privacy, a user may employ multiple keys for different transactions. However, to facilitate removal of the stored transactions in the future, all keys would need to be stored which complicates key management and storage. MOF-BC introduces the notion of a Generator Verifier (GV) which is a signed hash of a Generator Verifier Secret (GVS). The GV changes for each transaction to provide privacy yet is signed by …