Cryptography, Blockchain, Ethereum, ICO, Bitcoin.
multiplication *) formed a pair (G, •). The associated operation is the only one authorized on the set. This pair (G, •) defines a group if the following four properties are matched: Closure: For all a, b in G, a •b is also in G Associativity: For all a, b, c in G, (a • b) • c = a • (b • c)