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Samourai Wallet Profile picture
Samourai Wallet
@SamouraiWallet
Keep your transactions private, your identity masked, and your funds secure. Encrypted Support Email PGP B454 F6CD C443 8D30 3B7D 0A9B 43B2 CA46 C360 D93C
Jan 23 • 10 tweets • 4 min read
In Oct we asked our attorney @Deliver8tor to assemble an expert legal team to respond to FinCEN's proposed rules that would effectively ban bitcoin privacy best practices such as not reusing addresses, and coinjoin.

Last night our letter was submitted

blog.samourai.is/our-response-t…
Image FinCEN should withdraw entirely the Mixing Transaction NPRM because if adopted, would be the first time FinCEN used its Section 311 powers against a class of transactions, but also the first time FinCEN has ever imposed Special Measure 1. Image
Dec 7, 2023 • 10 tweets • 2 min read
We can confirm that @ocean_mining has enacted a policy of censoring Whirlpool coinjoin transactions and BIP47 notification transactions as of Dec 6, 2023

This is a regrettable action by the operators @jack and @LukeDashjr and far surpasses any hostile action we have seen before Luke is claiming that Whirlpool transactions are "bugged" and create non standard transactions due to a 46 byte OP_RETURN present in Whirlpool Tx0 transactions.

This is a lie. He knows it is a lie. The OP_RETURN limit has been 80 bytes since Bitcoin Core version 0.12 Image
Jun 30, 2022 • 22 tweets • 8 min read
With all the chatter about the latest statist overeach in the EU regarding bitcoin and 'unhosted wallets' I figured I would share some slides from my talk at @GunsnBitcoin 2022 in Miami

Let's start with Satoshi's white paper titled "Bitcoin: A Peer-to-Peer Electronic Cash System Image The clue is in the title.

Take note of the following key words:
- Peer-to-Peer
- Electronic Cash.

We'll come back to that, but first to understand what Satoshi invented we need to understand physical (non digital) cash Image
Mar 17, 2022 • 8 tweets • 3 min read
We're seeing a large number of coins leaving Wasabi into Whirlpool over the last few days. The market is speaking and loudly repelling censorship and surveillance.

If you're new, especially coming from Wasabi this thread will explain the key differences in Whirlpool In Whirlpool the coordinator fee is a flat fee and is paid upfront. The flat fee makes it cheaper to coinjoin for users (instead of % of amt you mix) and makes it more costly for an attacker to disrupt the registration phase. We call this setup transaction the "Tx0"
Mar 14, 2022 • 8 tweets • 2 min read
CoinJoin coordinators are simply message passers. This is true of Wasabi & Whirlpool. They are not money transmitters, they are not facilitators they simply pass data packets to connected clients. Clients never surrender custody to any 3rd party. Clients collaborate w/ each other Your ISP is not responsible for the websites you visit, even though they serve you the data packets that made your visit possible.

Your VPN is not responsible for copyright infringement when you illegally download a torrent.
Feb 19, 2022 • 11 tweets • 4 min read
We're proud to release the Bitcoin Privacy Series on youtube today. The first 7 videos are all under 7 minutes long and will get you up to speed on the challenging concept that is bitcoin privacy.

Check out the playlist & like and sub for more videos

The first video introduces the concept of Unspent Transaction Outputs (UTXOs). This is a fundamental step in understanding bitcoin transaction privacy. In 2 minutes you will gain an understanding of UTXOs

Feb 18, 2022 • 5 tweets • 2 min read
It is absolutely essential that any truckers who received bitcoin yesterday from @HonkHonkHodl do not attempt to cash out using a centralized exchange.

These funds are subject to a Mareva injunction and violation of that order is a criminal act

ottawaconvoyclassaction.ca/order-mareva.p… Unfortunately because of the way the organizers decided to distribute these funds with static known addresses and obvious structuring links on the bitcoin blockchain all the source addresses and many of the distribution addresses are specified in this injunction
Feb 9, 2022 • 10 tweets • 5 min read
7 years ago today @SamouraiDev and I were sitting in a seedy London pub writing down our mission statement on a damp bar napkin

We can't believe how far the project has come nor how full our backlog still is. Join us as we look back at an abridged timeline of the last 7 years Starting as a 'nights and weekend' side project with only the two of us, progress was slow, but we managed to achieve some major milestones such as being the first wallet to implement BIP47 stealth addresses and the first mobile wallet to give users full miner fee control
Feb 3, 2022 • 12 tweets • 5 min read
Why we CoinJoin, a thread.

First we need to look at the existing fiat system we are hoping to ultimately replace, the privacy expectations of that fiat system, and how we can achieve a similar outcome when using the Bitcoin network. Let's examine physical cash. You go to an ATM and withdraw cash from your bank account. Your bank knows you used an ATM, they know how much you took out, but that's where their vision ends.

Physical cash is fungible and private.
Jan 27, 2022 • 8 tweets • 2 min read
Our understanding of AOPP is it that is some sort of API that wallet developers can incorporate that will automatically 'prove' ownership of a non custodial wallet to the exchange where the user is withdrawing from.

Here is why Samourai Wallet won't include support for AOPP 1) Undermines self custody. Ironically proponents of this say this will promote self custody by providing a regulated pathway. That is nonsense and by buying into this system you are legitimizing the concept that self custody requires permission & compliance.
Aug 11, 2021 • 6 tweets • 2 min read
Understanding Bitcoin Privacy with OXT

A four part crash course in bitcoin privacy and blockchain analysis. Users armed with this knowledge are better prepared for evaluating the implications of spending and receiving and can begin to take steps to protect their privacy. 👇 Part 1/4
Basic Introduction to Chain Analysis And Transaction Privacy

medium.com/oxt-research/u…
Dec 15, 2020 • 14 tweets • 7 min read
Our latest research report by @ErgoBTC and @LaurentMT is now live on OXT Research.

We follow the trail of the 1,000 BTC stolen in the recent @kucoincom theft.

We track the coins as they are pushed through a complicated scheme of multiple mixers

research.oxt.me/china-and-nort… Image We detail the immediate movements of the stolen BTC as they are split and chopped into several mixing services.

Using the free @oxt_btc Analysis Platform we are able to identify the mixing services used (some surprises here!) ImageImage
Jun 1, 2020 • 8 tweets • 3 min read
This is absolutely outrageous.

This is called a Sybil attack, and the operator of this mixing software is admitting - and even laughing about it - that Sybilling their users is official company policy.

From the article: archive.is/jnlpW We first detected Sybil behaviour in Wasabi during the summer of 2019, which was flatly denied by the Wasabi team. Further to that, our staff were doxxed by Mr. Fiscor in retaliation for our disclosure.

Apr 29, 2020 • 6 tweets • 4 min read
Our new report by @ErgoBTC is now live on OXT Research

Follow the trail of BTC stolen by the notorious 🇰🇵 North Korean cybercrime collective, The Lazarus Group.

We track the coins as they are laundered through exchanges and inadequate mixing clients.

research.oxt.me/china-and-nort… We dive into the Complaint issued by the US Government, and explore the addresses listed on the OFAC Sanctions List and Defendants Property List

Using the free OXT Analysis Platform we are able to connect the pseudonyms in the Complaint to various exchanges and entities
Feb 28, 2020 • 12 tweets • 4 min read
How to Whirlpool on mobile, a tweet thread tutorial First, you need some coins in your wallet. The smallest amount you can mix is a little above 0.01005 BTC. If your wallet is empty, then add some funds using the "Receive" action
Jul 22, 2019 • 17 tweets • 5 min read
PSA

There exists an entity operating as a de-anonymizing “hot wallet” present within transactions by Wasabi since June 1, 2019. This entity has been clustered very easily due to flagrant address reuse, and downright bizarre behavior. This impacts ALL users since June.

👇👇 This entity participates in Wasabi transactions and enjoys an address reuse rate of over 60%. Of course, there should be 0% address reuse within any mixing platform, so something is not right. Let's look into it.

OXT Entity Cluster: oxt.me/entity/tiid/23…