====== Hashgraph ======
[[dido:public:ra:xapend:xapend.a_glossary:start| Return to Glossary ]]

**Hashgraph** is a [[dido:public:ra:xapend:xapend.a_glossary:d:dlt]] that has been described as an alternative to [[dido:public:ra:xapend:xapend.a_glossary:b:blockchain | Blockchains]]. The Hashgraph technology is currently patented, and the only authorized ledger is Hedera Hashgraph. The native cryptocurrency of the Hedera Hashgraph system is **''HBAR''**.

Unlike blockchains, Hashgraphs do not use [[dido:public:ra:xapend:xapend.a_glossary:m:miner | Miner Nodes]] to validate [[dido:public:ra:xapend:xapend.a_glossary:t:transaction | Transactions]]. Instead, Hashgraph use a [[dido:public:ra:xapend:xapend.a_glossary:g:gossip | "gossip about gossip" protocol]] where the individual [[dido:public:ra:xapend:xapend.a_glossary:n:node | Nodes]] on the network "gossip" about transactions to create [[dido:public:ra:xapend:xapend.a_glossary:d:directed_acyclic_graph_dag | Directed Acyclic Graphs (DAGs)]] that time-sequence transactions without bundling them into blocks. Each "gossip" message contains one or more transactions plus a timestamp, a digital signature, and cryptographic hashes of two earlier events. This makes Hashgraph form an [[dido:public:ra:xapend:xapend.a_glossary:a:abft]] consensus algorithm.

Hashgraph was invented in the mid-2010s by the American computer scientist Leemon Baird. Baird is the co-founder and chief technical officer of Swirlds, a company that holds patents covering the **Hashgraph** algorithm.

Source: [[https://en.wikipedia.org/wiki/Hashgraph ]]


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