Anonymity Analysis

https://gyazo.com/0a9f1c21b533cd66c7aed9fa3ee1e035

P2P layer anonymity

それぞれのノードは接続するホストのIPアドレスを保持。

新しいincoming connectionがoriginalなhost (intermedinatorではない）である可能性が高い

Kovri

Transaction graph

One technique consists in using brand new addresses every time one receives new funds. Hierarchical Deterministic (HD) wallets do that automatically. However, we saw that under some circumstances, this does not necessarily increase anonymity.

Linking addresses to real-world identity

Mentioning on an online platform (or other media), a name (or any other personal identifier) alongside a relevant bitcoin address.

Registering and buying Bitcoins on a centralized exchange. Most exchanges that allow the purchase of Bitcoins for fiat currency are required to comply with anti money laundering regulations. As a result, any new subscriber must provide personal information including e.g., a valid government ID, an address, a utility bill, a bank account number. One way to mitigate this is to purchase BTC offline using cash, which might be logistically more challenging.

Buying with BTC at a point of sale. If the seller requires an address (e.g., for the purpose of shipping goods) or other personal information, the Bitcoin address will be linked to the customer’s identity, hence threatening her anonymity.

cex, donation, forumsなどでidentityとlinkすると永遠にtxが相関

If a linkage between a public key and a user’s unique identifier (IP address, name, e-mail, social media account, website etc.) is revealed, fi- nancial privacy is permanently lost.