Computer Science

Computer Science ›› 2021, Vol. 48 ›› Issue (6A): 498-503.doi: 10.11896/jsjkx.201000143

• Information Security • Previous Articles     Next Articles

Electronic Prescription Sharing Scheme Based on Blockchain and Proxy Re-encryption

TANG Fei1,2, CHEN Yun-long1, FENG Zhuo1   

  1. 1 School of Computer Science and Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China
    2 School of Cyber Security and Information Law,Chongqing University of Posts and Telecommunications,Chongqing 400065,China
  • Online:2021-06-10 Published:2021-06-17
  • About author:TANG Fei,born in 1986,Ph.D,associate professor.His main research interests include public key cryptography,blockchain,and so on.
  • Supported by:
    National Natural Science Foundation of China(61702067) and Chongqing Natural Science Foundations(cstc2017jcyjAX0201).

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Abstract: The storage mechanism of electronic prescription data generally is centralized.Such centralized mechanism may suffer from the risk of insider tampering attack.In addition,prescription data is important privacy information for users.Therefore,it needs to be encrypted during storage or transmission.However,common encryption schemes often have the problem that they are difficult to sharing.In order to solve the problems of electronic prescription storage centralization,sharing difficulties and high storage and transmission security requirements,this work proposes an electronic prescription sharing scheme based on blockchain and conditional proxy re-encryption.The conditional proxy re-encryption scheme can provide an efficient ciphertext forwarding mechanism for electronic prescription sharing.It also can realize a fine-grained division method of decryption authority.The traditional proxy re-encryption scheme based on identity conditions requires a trusted key generation center (KGC) to generate user keys.However,this requirement is in contradiction with the decentralized feature of the blockchain.We use the distributed key generation technology to solve this key escrow problem,and construct a conditional proxy re-encryption scheme with multiple authorities to make it suitable for blockchain scenarios.Finally,we analyze the proposed scheme from the aspects of correctness and safety.

Key words: Blockchain, Conditional proxy re-encryption, Distributed key generation, Electronic prescription

CLC Number: 

  • TP311
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