Wallets
A wallet stores the information necessary to transact bitcoins. While wallets are often described as a place to hold[64] or store bitcoins,[65] due to the nature of the system, bitcoins are inseparable from the blockchain transaction ledger. A better way to describe a wallet is something that "stores the digital credentials for your bitcoin holdings"[65] and allows one to access (and spend) them. Bitcoin uses public-key cryptography, in which two cryptographic keys, one public and one private, are generated.[66] At its most basic, a wallet is a collection of these keys.
There are several types of wallets. Software wallets connect to the network and allow spending bitcoins in addition to holding the credentials that prove ownership.[67]Software wallets can be split further in two categories: full clients and lightweight clients.
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