![]() Research outcomes include scientific papers and the production of software for experimentation as well as providing direction for other NIST endeavors in this space. NIST researchers have been investigating blockchain technologies at multiple levels: from use cases, applications and existing services, to protocols, security guarantees, and cryptographic mechanisms. Since a blockchain network is difficult to alter or destroy, it provides a resilient method of collaborative record keeping. This domino effect allows all users within the blockchain to know if a previous block’s data has been tampered with. As a result, if the data is changed in one block, it’s unique identifier changes, which can be seen in every subsequent block (providing tamper evidence). A block is connected to the previous one by including a unique identifier that is based on the previous block’s data. ![]() The transactional records (data) are grouped into blocks. ![]() Blockchain represents a new paradigm for digital interactions and serves as the underlying technology for most cryptocurrencies.Ī blockchain is a collaborative, tamper-resistant ledger that maintains transactional records. ![]()
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