A blockchain is a distributed ledger with growing lists of records (blocks) that are securely linked together via cryptographic hashes.

The identity of Nakamoto is unknown,
but speculations have focussed on various cryptography and computer science experts, most of non-Japanese descent.

“If you don't believe it or don't get it, I don't have the time to try to convince you, sorry.” ...
Satoshi Nakamoto
Known for Inventing bitcoin, implementing the first blockchain
The Evolution of Blockchain

A Journey Through its History

Blockchain technology has continued to make headlines in recent years, largely due to its association with cryptocurrencies such as Bitcoin. However, the roots of blockchain go much deeper, and its applications stretch far beyond the realm of digital currencies. This blog post aims to provide a brief history of blockchain technology, tracing its evolution from its inception to the present day.
The Birth of
Blockchain
Blockchain technology was first conceptualized by Stuart Haber and W. Scott Stornetta in 1991. They wanted to implement a system where document timestamps could not be tampered with. However, it was not until 2008 that the idea of a decentralized secure blockchain was introduced by an anonymous person or group of people known as Satoshi Nakamoto. This was implemented as a core component of the cryptocurrency Bitcoin. The main innovation was that it solved the double-spending problem without the need for a central authority or server.

Satoshi Nakamoto

Satoshi Nakamoto is the name used by the presumed pseudonymous person or persons who developed Bitcoin, authored the bitcoin white paper, and created and deployed bitcoin's original reference implementation.As part of the implementation, Nakamoto also devised the first blockchain database. Nakamoto was active in the development of bitcoin up until December 2010. There has been widespread speculation about Satoshi Nakamoto's true identity, with various people posited as the person or persons behind the name. Though Nakamoto's name is Japanese, and he stated in 2012 that he was a man living in Japan,most of the speculation has involved software and cryptography experts in the United States or Europe.

Cryptography, or cryptology (from Ancient Greek: κρυπτός, romanized: kryptós "hidden, secret"; and γράφειν graphein, "to write", or -λογία -logia, "study", respectively), is the practice and study of techniques for secure communication in the presence of adversarial behavior. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, information security, electrical engineering, digital signal processing, physics, and others. Core concepts related to information security (data confidentiality, data integrity, authentication, and non-repudiation) are also central to cryptography. Practical applications of cryptography include electronic commerce, chip-based payment cards, digital currencies, computer passwords, and military communications.