239

Blockchain in Digital Forensics

old transactions, and after validation, the transaction is added to the existing block­

chain. Transactions are made part of a particular block according to the time frame

in which they occurred. In bitcoin,

“A block may contain more than 500 transactions on average, the average size of a

block is around 1 MB (an upper bound proposed by Satoshi Nakamoto in 2010)”.

http://satoshinakamoto​.me​/whitepaper/

FIGURE 14.1  Basic architecture of blockchain system.

FIGURE 14.2  Types of blockchain.