02231nas a2200313   4500000000100000000000100001008004100002260001200043653002300055653001500078653001800093653001700111653005800128653001600186653003600202100001800238700001400256700001400270700001300284700001500297700001800312700001600330245010000346856008000446300001000526490000600536520136100542022001401903       2022                            d  c09/202210aInternet of things10aBlockchain10aData Security10aData Privacy10aCiphertext-Policy Attribute-Based Encryption (CP-ABE)10aAgriculture10aAgricultural Internet of Things1 aGuofeng Zhang1 aXiao Chen1 aLei Zhang1 aBin Feng1 aXuchao Guo1 aJingyun Liang1 aYanan Zhang00aSTAIBT: Blockchain and CP-ABE Empowered Secure and Trusted Agricultural IoT Blockchain Terminal  uhttps://www.ijimai.org/journal/sites/default/files/2022-08/ijimai_7_5_8.pdf  a66-750 v73 aThe integration of agricultural Internet of Things (IoT) and blockchain has become the key technology of precision agriculture. How to protect data privacy and security from data source is one of the difficult issues in agricultural IoT research. This work integrates cryptography, blockchain and Interplanetary File System (IPFS) technologies, and proposes a general IoT blockchain terminal system architecture, which strongly supports the integration of the IoT and blockchain technology. This research innovatively designed a fine-grained and flexible terminal data access control scheme based on the ciphertext-policy attribute-based encryption (CP-ABE) algorithm. Based on CP-ABE and DES algorithms, a hybrid data encryption scheme is designed to realize 1-to-N encrypted data sharing. A "horizontal + vertical" IoT data segmentation scheme under blockchain technology is proposed to realize the classified release of different types of data on the blockchain. The experimental results show that the design scheme can ensure data access control security, privacy data confidentiality, and data high-availability security. This solution significantly reduces the complexity of key management, can realize efficient sharing of encrypted data, flexibly set access control strategies, and has the ability to store large data files in the agricultural IoT.  a1989-1660