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Halving

Halving is the 50% reduction in the blockchain rewards to miners for successfully mining a block. In Bitcoin this halving occurs every 210,000 blocks, or approximately every 4 years. Bitcoin…

Hard Cap

The Hard Cap is the predetermined maximum amount that can be raised in an ICO. If the hard cap is hit, even if it only takes seconds, the ICO stops…

Hard Fork

A hard fork is a change to the rules of a blockchain that makes previously invalid transactions valid, or vice versa. Once the hard fork rules go live it is…

Hardware Wallet

A hardware device that can securely store crypto-currency. This is one of the most secure ways to manage your cryptocurrency funds. The hardware wallet gets its security from the fact that…

Hash

A hash function takes an arbitrary input such as a string of integers (a key) and outputs a value of a pre-specified length (a hash). Bitcoin uses a cryptographic hash…

Hash Type (Hashtype)

A single byte appended to a transaction signature in the transaction input which describes how the transaction should be hashed in order to verify that signature. There are three types…

Hash160

SHA-256 hashed with RIPEMD-160. It is used to produce an address because it makes a smaller hash (20 bytes vs 32 bytes) than SHA-256, but still uses SHA-256 internally for…

Hashes per Second

Hashes per Second is a measure of how many hashes are produced by a computer in one second. One hash per second is quite small, so there are also denominations…

Hashing / Hash Function

Hashing or a Hash Function is a function which converts variable data into an alphanumeric code. Hashing is a cryptographic function that was created to allow for rapid retrieval of…

Hashrate

Hashrate is the speed at which a computer is completing an operation in the Bitcoin code. For example, 1GH/s = One Giga Hash = A computer is capable of trying…

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