Ziar, Riaz Ahmad, Syed Irfanullah, Wajid Ullah Khan, & Abdus Salam. " Privacy Preservation for On-Chain Data in the Permission less Blockchain using Symmetric Key Encryption and Smart Contract." Mehran University Research Journal of Engineering and Technology [Online], 40.2 (2021): 305 - 313. Web. 3 Nov. 2024