Toward Blockchains for Health-Care Systems

Applying the bilinear pairing technology to ensure privacy protection and accuracy in data sharing.

文章重点在blockchain的data transmission方面

• user通过wearable device or sensor 给node 它的identity verification ，通过这种方式触发privacy protection来保护user的数据
• NodeA broadcast a request message给blockchain中的其他node要患者在其他医院的medical records

Prior to processing personal information, one must obtain unambiguous consent from the involved party.

保证区块链网络安全：
public-key cryptography and bilinear pairing

public-key cryptography：

• every node and user have their own public key, private key, and certificate
• 1 Identity authentication
• 2 Privacy protection
• 3 Medical information collection
• 简言之就是user给node一个message，用public key 防止数据泄漏

bilinear Pairing algorithms：

• a cryptography technique based on elliptic curve cryptography with the fol- lowing three characteristics: bilinear, nondegeneracy, and computable
• The bilinear pairing’s ID-based cryptography 用来实现 distributed key management, confidentiality, identity authentication, message integrity, nonrepudiation, and privacy
• 也从三方面分析了bilinear pairing’s ID-based cryptography
• 1 Identity authentication
• 2 Privacy protection
• 3 Medical information collection
• When applying ID-based cryptography to identity authentication, the approach relies on using public keys and private keys to establish a common secret key

simulation environment：
32-bit Intel Pentium IV 3.0-GHz (Prescott) (Prescott) processor
分析时间消耗：

TLS for private communication and cryptography
node收集其他node的信息需要 n*96 . 8ms