Blockstream is dreaming up a whole new type of multisig called ROAST

Blockstream is dreaming up a whole new type of multisig called ROAST – Mail Bonus

The research unit Bitcoin (BTC) -based blockchain technology company Blockstream has published a proposal for a new type of multisig standard called Strong asynchronous Schnorr threshold signatures (STONE).

It hopes to avoid problems with business mistakes due to absent or even malicious signatories and can work on a scale.

The term multisigature, or multisignature, refers to a business method where two or more signatures must be logged out before it can be executed. The standard is widely used in cryptography.

According to a May 25 blog post from the Blockstream study, the basic idea of ​​ROAST is to make trading between the Bitcoin network and the Blockstream side chain Liquid more efficient, automated, secure and personal.

In particular, ROAST has been presented as a signature standard that could work with and improve reference signature systems such as FROST (Flexible Round-Optimized Schnorr Threshold Signatures):

“ROAST is a simple packaging around a signature system like FROST. This ensures that the resolutions of honest signatories, such as Liquid employees, can always be validly signed, even in the presence of disruptive signatories when internet connections are arbitrarily highly secretive.

The researchers emphasized that while FROST can be an effective way to register BTC trades, its structure is managed by supervisors and signatories to cancel trades in the presence of absent signatories, making it secure but unsuitable for “automated signing software”. .

To solve this problem, the researchers say that ROAST can provide a sufficiently reliable signer for each transaction to avoid mistakes, and this can be done on a much larger scale than the 11-by-15 multisig standard that Blockstream primarily uses. .

“Our metrological performance evaluation shows that ROAST is good for large groups of signatories, for example 67 out of 100 setups with a supervisor and signatories on different continents,” says the post, adding that:

“Even with 33 malicious signatories trying to block signature attempts (for example, by sending invalid answers or not responding at all), the 67 honest signatories can produce a signature within seconds.”

To provide a simple explanation of how ROAST works, the team used a counterpart to the Democracy Council, which is responsible for Frostland legislation.

In essence, the argument is made that it can be complicated to get legislation (business) written off in Frostland, as there are a myriad of factors at any given time that can lead to the majority of local councilors suddenly becoming unavailable or absent.

The approach (ROAST) to counteract this is for the Secretary of State to compile and maintain a sufficiently large list of support representatives (signatories) at any given time, so that there are always enough people to enforce the law.

“If at least seven members of the council support the bill and behave honestly, he knows at any moment that these seven members will eventually sign the copy that is currently being distributed and will be added back to the list of secretaries.

“This way, the secretary can always be sure that seven members will be back on his list at some point in the future, so the signing process will not get stuck,” the post added.

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ROAST is part of a collaboration between Blockstream scientists Tim Ruffing and Elliott Jin, Viktoria Ronge and Dominique Schröder from the University of Erlangen-Nuremberg and Jonas Schneider-Bensch from the CISPA Helmholtz Center for Information Security.

Through the blog post, the researchers also linked to a 13-page research paper that provides more information about ROAST.