Digital_Passport_and_Visa_Asset_Management_Using_Private_and_Permissioned_Blockchain. (arXiv:2107.06849v1 [cs.CR])

Blockchain is currently one of the fastest-growing technologies in the field
of Computer Science. It has found a prevalent use in financial applications
like cryptocurrency, for example, Bitcoin and Ethereum. They have been able to
bring an unforeseen disruption in the field of finance. However, permissionless
Blockchains like these have some downsides, namely the computation cost of the
Proof of Work algorithm, maximum allowed size for a block, decrease in
intelligibility with the increase of the number of blocks in the chain,
domination of nodes with higher computing power as miners and validators. These
factors have restricted the adoption of permissionless blockchain technology
outside the field of finance, such as in medical or legal fields. This paper
proposes a solution to these problems using a permissioned blockchain. It does
not require a computationally expensive consensus mechanism as permissioned
chains call for trust between participating organizations which is achieved via
exclusive invitations. We have utilized a third-party orderer to maintain the
trust between organizations.