Hyperledger

Open‑source umbrella for enterprise blockchain frameworks such as Fabric and Besu.

Hot Wallet

Wallet connected to the internet for convenience; higher attack surface than cold storage.

Homomorphic Encryption

Encryption that allows limited computation on ciphertexts; fully homomorphic variants support arbitrary circuits.

HODL

Community term meaning to hold assets through volatility instead of trading.

HD Wallet (BIP32)

Hierarchical deterministic wallet deriving many keys from a single seed using paths like m/44’/60′.

Hardware Wallet

Physical device that stores private keys in a secure element and signs transactions offline.

Halving

Scheduled reduction of block subsidy in PoW chains, decreasing new issuance rate.

Hash Preimage

An input whose hash equals a given digest; revealing it unlocks HTLCs and commit‑reveal schemes.

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