Anything that has value to a stakeholder.
Specific type of DLT.
Database which is:
- organized in sequential blocks:
Data structure comprising zero or more transaction records or references to transaction records.
Agreement among nodes that:
- a transaction is validated
- the distributed ledger contains a consistent set and ordering of validated transactions
Consensus does not necessarily mean that all nodes agree.
The details regarding consensus differ between blockchain designs and this is one key distinguishing characteristic between one design and another.
Rules and procedures by which consensus is reached.
Function mapping binary strings of arbitrary length to binary strings of fixed length, such that it is computationally costly to find for a given output an input which maps to the output, and it is computationally infeasible to find for a given input a second input that maps to the same output
Computational feasibility depends on the specific security requirements and environment.
Reference, constructed using a cryptographic hash function technique, that points to data.
A cryptographic link is used in the block header to reference the previous block in order to create the append-only, sequential chain that forms a blockchain.
Property wherein ledger records cannot be modified or removed once added ("append-only") to a distributed ledger.
Where appropriate, immutability also presumes keeping intact the order of ledger records and the links between the ledger records.
Device or process that participates in a network and stores a complete or partial replica of the ledger records.
Key of an entity's asymmetric key pair which can be made public.
Key of an entity's asymmetric key pair that is kept secret and which should only be used by that entity.
Information created, received and maintained as evidence and as an asset by an organization or person, in pursuit of legal obligations or in the transaction of business.
Applies to information in any medium, form or format.
Smallest unit of a work process, which is one or more sequences of actions required to produce an outcome that complies with governing rules.
Where appropriate, transaction is understood more narrowly, as the smallest unit of a work process related to interactions with blockchain or distributed ledgers.