How a Bitcoin Blender Prevents Blockchain Snooping

bitcoin blender also known as bitcoin tumblers, are essential tools for enhancing the privacy of cryptocurrency transactions. They prevent blockchain snooping by creating a complex web of transactions that make it difficult to trace the original sender and recipient.

The US Treasury recently slapped sanctions on the coin mixer Blender for helping North Korean state-sponsored hacking group Lazarus Group launder stolen digital assets. However, it appears to have rebranded as Sinbad and is still in operation.


In this digital era where financial transactions can be traced, Bitcoin users need extra privacy measures to protect their wallets and online identities from bad actors and prying eyes. Bitcoin mixers, also known as bitcoin tumblers, are one of the most effective tools in achieving this goal. They work by breaking the link between an initial and final Bitcoin address, making it difficult to track a transaction.

These services are able to conceal your wallet address and web identity by combining your coins with other crypto on their reserve, shuffling them through a random system, and then sending untainted crypto back to your wallet. Moreover, they are also capable of hiding your IP addresses to restrict hackers and third parties from tracking your activities on the internet. This is something that Satoshi himself advocated for when he created Bitcoin, so mixing services are an essential part of the cryptocurrency’s ecosystem.


The security of bitcoin mixers is crucial to preserving the privacy and anonymity of cryptocurrency users. These services are essential tools that prevent the traceability of digital assets by mixing them with others and sending the result to new wallets. For this reason, they can be used by criminals to launder stolen cryptocurrencies. For example, in a hack later linked to North Korean threat actor Lazarus Group, the attackers stole more than $100 million worth of Bitcoin. Using mixers such as Blender and Tornado Cash, the hackers were able to conceal their identities and hide the origin of the funds. Following OFAC sanctions against these two services, researchers believe Lazarus has started to use a new mixer service called Sinbad. According to blockchain analysis company Elliptic, this new service has similar on-chain patterns to Blender and Tornado Cash.


Bitcoin mixers are vital tools for enhancing the privacy and security of cryptocurrency transactions. They work by mixing your coins with other users’ funds to make it difficult for any one to trace your transaction. In addition, they usually add a time delay to the withdrawal process so that your coins don’t arrive in the same order that you sent them.

While the exact workings of a bitcoin blender vary, most services have similar features. First, you must transfer your bitcoin to the blending address and wait for a specified time period. After the mixing process is complete, you will receive your new bitcoin at the second transition wallet. Traders should choose a trusted cryptocurrency mixer and be careful not to reveal any personal information when using the service.

In 2022, US Treasury’s Office of Foreign Assets Control (OFAC) sanctioned Blender, which is believed to have laundered tens of millions in Bitcoin from hacks linked to the Lazarus group. Soon after, Blender was replaced by Sinbad. Analysis of blockchain transactions suggests that the first incoming transactions to Sinbad came from a wallet associated with Blender’s operator, suggesting the two services were closely connected. Sinbad has since been rebranded as Tornado Cash, which appears to be a custodial mixer that takes ownership of the coins deposited into it.


Using a bitcoin blender is an effective way to make it more difficult for criminals to trace ill-gotten crypto assets. The service works by combining your incoming and outgoing transactions to obfuscate the original source. For example, if you send coins to an address with wallet #namedW, the mixer will mix them with new ones and transfer them to another address with #namedY. This makes it impossible to trace the origin of your original coins.

This type of bitcoin mixer is important because it can prevent hackers from laundering money through the use of stolen crypto. It can also protect users from identity theft and money laundering activities by obscuring their transaction histories. For this reason, it’s important to choose a reputable mixer that can guarantee the security of your private key and other personal information.

Blender has relaunched under a new name, according to researchers at Elliptic. They say that the app, which was sanctioned last year by the US Treasury Department’s Office of Foreign Assets Control (OFAC), is now called Sinbad. They believe that the rebranding was done to avoid OFAC sanctions.

Sinbad is a custodial mixer, meaning its operator has full control of the cryptocurrency that is deposited in it. This is in contrast to Blender, which was a non-custodial mixer and only acted as an intermediary. In addition, Sinbad has the ability to provide up to 10 additional outputs. The withdrawal delay is also user-controlled, with options ranging from 1 hour to 24 hours.

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