Public Key

Overview

Public keys can be shared without directly revealing their corresponding private keys under the cryptographic assumptions of the system. Networks use them to verify that a transaction or message was authorized by the holder of the related secret.

A public key is not always identical to a wallet address. Many networks hash, encode, or combine keys with scripts, contracts, or network identifiers to create addresses. Public keys can also expose privacy relationships, and some remain hidden on-chain until an output is spent.

Systems should validate key format, curve, encoding, and network context before use. Public keys used for identity or authorization need trusted binding to the correct person or system. Exposure normally does not permit signing, but publishing broad extended public keys can reveal address trees and transaction history.

For Public Key, risks include weak generation, exposed backups, phishing, malware, unauthorized export, compromised devices, incorrect derivation metadata, unavailable recovery shares, and silent policy bypass. For Public Key, encryption at rest is useful but does not replace access control, separation of duties, tamper evidence, and tested recovery.

Public Key is not interchangeable with the wallet application or the assets controlled through it. For example, restoring a seed can reproduce keys but still fail to recover funds when network, derivation path, script type, account index, passphrase, or contract configuration is missing.

Public Key participates in a chain from transaction construction through policy evaluation, human or service approval, signing, broadcast, and verification. For Public Key, each stage should receive only the minimum data and privilege it needs, while the final signer independently verifies security-critical fields such as destination, amount, asset, network, and contract.