Hardware Wallet

A physical device that stores private keys.

Hash

Output emitted from an algorithm for maintaining consensus on a blockchain.

Hard Cap

The maximum amount of money a cryptocurrency’s founders will accept while raising money in exchange for early coins on their platform.

Hash Rate

The number of hashes a miner performs over a given period of time.

HODL

First made popular in a post by a drunken Bitcoiner who advocated buying but not selling Bitcoin, it is now a meme to intentionally misspell “hold.” Hodlers see huge potential in the future of a cryptocurrency and don’t plan on selling anytime soon.

Hot Wallet

An online wallet for storying cryptocurrencies. Considered less secure than cold wallets.

Haskell

A programming language used to develop several cryptocurrencies (including Cardano and Nanocoin).

Hybrid PoS/PoW

A consensus mechanism that employs both Proof of Stake and Proof of Work algorithms.

Halving

The process of intermittently decreasing the block reward given to cryptocurrency miners by 50%.

Hodler

Someone who does not sell, but holds on to his coins. "HODL"  was originally a typo but it gained the status of a funny backronym: “Hold on for dear life”.

Hedging

The act of protecting an asset from risk. A hedge can protect against losses or even offset against gains.

Hashgraph

Hashgraph is a consensus alternative to blockchain. It uses a gossip protocol to spread transactions across the network by sending data to randomly chosen neighbors.

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