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Bitcoin

Bitcoin is the world's first peer to peer decentralised digital currency created in 2009 by an unknown person or group of persons known as Satoshi Nakamoto, it's also called a cryptocurrency for its use of cryptography to secure the network and make transactions pseudonymous, with bitcoin you don’t need to go through a bank, clearinghouse or third party of any kind use money.

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Transaction Malleability Attack

It's a dubious exploit that allows an attacker to modify a bitcoin transaction's unique ID before it's confirmed on the network. If the attacker is able to successfully pull this off,  the alteration allows someone to pretend that a transaction never took place.

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Transaction Malleability

Transaction malleability is the process of altering a transaction's unique id by altering the digital signature that was used to generate it.

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