Wasabi additional privacy-focused features include:
A coin control feature
allows users to choose the input address from which to spend and enforce manual selection of
coins to prevent the wrong coin from being included in a transaction.
Block-filter
as a light client wallet, Wasabi includes a compact block filter. A light wallet needs to connect
to one of the nodes in the Bitcoin network to get the status of all addresses in the wallet, which
may decrease users’ privacy and allow linking between a wallet and the blockchain addresses it
controls. It can even correlate transactions with users’ IP addresses. To increase users’ privacy,
Wasabi uses a block-filter, which conceals the requested addresses in the block, so they won’t
appear in the Bitcoin network. Wasabi downloads full blocks and checks locally to confirm whether
any of them contain transactions with addresses of the wallet. This precludes public keys from
being sent to any third-party server. Wasabi then prevents the possibility of creating a linkage
between bitcoin addresses and IP addresses and clustering addresses.
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