All #!?123 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z



When a block reward of a crypto asset decreases by 50% with the purpose to reach a finite supply of this specific asset.

Hard Cap

Regarding ICO, represents the top limit on the number of tokens that can be sold during that initial stage of funding.

Hard fork

A hard fork alters the blockchain data in a public blockchain. Requires all nodes in a network to upgrade and agree to the new version.


A function that converts one value to another. It converts an input of letters and numbers into an encrypted output of a fixed length. A hash is created using an algorithm essential to blockchain management in cryptocurrency.

Hash rate

The speed at which a machine can calculate new hashes (hashes/second).

HD Wallet

An HD Wallet, or Hierarchical Deterministic wallet, is a digital wallet that automatically generates a hierarchical tree-like structure of private/public addresses (or keys), thereby addressing the problem of the user having to generate them on their own.


Stands for High Frequency Trading – type of an algorithmic trading that enables the execution of large number of orders in a very short period of time.


Stands for Hold on for Dear Life – holding on to the ownership of the asset and not selling.

Hot Wallet

Also known as “warm wallet”, a hot wallet is at all times directly connected to the Internet. For example one that is held on a centralized exchange. Hot wallets are considered to have lower security than cold storage systems or cold wallets.


Stands for Hashed TimeLock Contract – a feature that creates smart contracts in cryptocurrency which can edit its channels by implementing time-bound transactions and eliminates risk.


Stands for Hypertext Transfer Protocol. The primary protocol used to send data between a web browser and a website.

HTTP methods

HTTP methods are a set of request methods to indicate the desired action to be performed for a given resource, to: GET (read), POST (create), PUT (update), PATCH (partially update), or DELETE (delete).


Stands for Hypertext Transfer Protocol Secure. It is a secure version of HTTP and is encrypted, which increases security during data transfer.