Imagine we have 4 people Ahmed, Muhammad, Islam and Omar
Each of them has a number of digital currencies, and Ahmed wanted to buy a commodity from Mohammed for 0.12 bitcoins. This means that Ahmed will access his electronic Bitcoin wallet and send Mohammed 0.12 bitcoins in exchange for purchasing that commodity - this is called a transaction.
This transaction must be recorded in the transaction record of the four people, so the storage unit divides the record - the transfer statement from Ahmed to Muhammad - into four encrypted partial copies, and sends it to the records of the four people “Ahmed, Muhammad, Islam, and Omar” so that each one of them is able On reading the record, and knowing that an amount of 0.12 Bitcoin was transferred from one person to another without the knowledge of the transferor or the recipient - that is, Islam and Omar know that there is a transfer process, but they do not know that the source is Ahmed nor the recipient is Muhammad.
This means that each of them has a small share of the data encrypted between them, and they can see all the transactions that are recorded at the same time, without decoding them or knowing the source of each transfer or the recipient, and all of this is done through the complex communication network managed by Bitcoin software. Himself.