Current progress on private Bitcoin transactions: 1. Silent Payments: - Silent Payments, a concept similar to BIP47, enhances privacy in Bitcoin transactions by allowing users to create reusable payment codes. - These payment codes can be tweaked by others to create unique public addresses, known only to the sender and receiver. - Ruben Somsen, who suggested Silent Payments, is a notable figure in the Bitcoin community. He emphasizes that this approach eliminates the data usage tradeoff associated with BIP47, reducing the load on operators with full nodes. - The first silent payment transaction was initiated on the Bitcoin testnet, Signet, in May 2022 https://www.thecoinrepublic.com/2022/05/27/how-do-silent-payments-increase-more-privacy-in-bitcoin-blockchain-transactions/ 2. BIP-324: - BIP-324 aims to add HTTPS-like encryption to Bitcoin, improving the security and privacy of transactions. - It helps prevent private metadata from leaking and allows for the verification that no malicious man-in-the-middle attacks are occurring during transactions. - The introduction of BIP-324 would mean that session IDs used in transactions could help identify and prevent attacks, enhancing overall security and privacy

Protos

BIP-324: Here’s everything you need to know about the Bitcoin proposal

BIP-324 promises to beef up the network's security and protect millions of users from so-called man-in-the-middle attacks.

3. BIP 157/158 - Client-Side Block Filtering: - These BIPs introduce client-side block filtering to enhance privacy on the Bitcoin network. - They allow clients to specify the types of transactions they’re interested in, reducing the amount of data received and enhancing privacy. - This approach improves privacy by allowing users to selectively retrieve only the transactions relevant to them https://www.doubloin.com/learn/bitcoin-bip-privacy-improvements 4. Schnorr Signatures: - Although not specified by a BIP number in the sources, Schnorr Signatures represent an important advancement in Bitcoin privacy. - They allow the aggregation of multiple signatures into a single signature, making it harder for observers to determine individual participants in a transaction. - This method enhances privacy by obfuscating the link between addresses and transactions https://www.doubloin.com/learn/bitcoin-bip-privacy-improvements