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ORACLE (BLOCKCHAIN)

Oracle (blockchain) is a third-party service that provides smart contracts with external information.

PAPER WALLET

Paper wallet is a physical document containing a cryptocurrency address and its private key.

PRIVACY COINS

Privacy coins are cryptocurrencies that offer enhanced privacy features to protect the identity of users.

PROOF OF AUTHORITY (POA)

Proof of authority (PoA) is a consensus mechanism where a limited number of validators have the authority to validate transactions.

PROOF OF BURN (POB)

Proof of burn (PoB) is a consensus mechanism where miners burn their own coins to gain the right to mine new blocks.

PROOF OF STAKE (POS)

Proof of stake (PoS) is a consensus mechanism where validators are chosen based on the number of coins they hold and are willing to 'stake' as collateral.

HASH FUNCTION

Hash function is a function that converts an input into a fixed-length string of characters, which is typically a hash code.

PUBLIC KEY

Public key is a cryptographic key that can be shared publicly and is used to encrypt data or verify a digital signature.

REPLAY ATTACK

Replay attack is a network attack where valid data transmission is maliciously or fraudulently repeated or delayed.

SEGWIT (SEGREGATED WITNESS)

SegWit (Segregated Witness) is a Bitcoin protocol upgrade that separates transaction signatures to increase block size limit and improve scalability.

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