Bitcoin Magazine Not ECDSA. Not Schnorr. Meet DahLIAS. Aggregate signatures aren’t new. They’ve been around since the early 2000s. But building one that actually works in Bitcoin’s security model, with Bitcoin’s elliptic curve, has never been proven. Developers speculated it might be possible. They shared hand-wavy sketches and said, “maybe it’d work like MuSig2, but across transaction inputs.” The idea lingered for years as developer folklore, close, never provably confirmed. That changed recently, when Jonas Nick and Tim Ruffing of Blockstream Research, together with Yannick Seurin of Ledger, published a paper that turned this cryptographic ghost story into a concrete, provable result. DahLIAS is the first formal, secure construction of a full constant-size aggregate signature (CISA) scheme that works on Bitcoin’s native curve! But that’s a lot of words, so let’s break that down: Full aggregation: Multiple signatures across different inputs are combined into one — and the result is a 64 byte signature whose size stays constant, no matter how many signers or inputs. Cross-input: Each signer can authorize different inputs, and all combine into one signature. It adds no significant new assumptions beyond those already relied on by Bitcoin. DahLIAS builds a new cryptographic primitive using the same math Bitcoin already relies on, unlocking an entirely new kind of signature. Let’s Talk About Curves and Signatures Digital signatures are how Bitcoin proves that a user has authorized a transaction. When you go to spend bitcoin, your wallet uses a private key to sign a message, and the network verifies that signature using the matching public key. Bitcoin uses the secp256k1 curve. It is fast, efficient, and has been battle-tested over time. It supports signature schemes like ECDSA (Bitcoin’s original signature algorithm) and Schnorr (added through Taproot in 2021), which are currently the only signature schemes permitted by Bitcoin consensus. Traditionally, full signature aggregation relied on mathematical operations not supported by Bitcoin’s curve, secp256k1, which made it seem out of reach. These features have typically relied on other types of elliptic curves. For example, BLS (Boneh–Lynn–Shacham) signatures use a special kind of curve called a pairing-friendly curve, which enables advanced operations like combining many signatures, even on different messages, into one. The problem is that BLS signatures do not work on secp256k1. While Schnorr was a natural upgrade from ECDSA, since both rely on the same kind of elliptic curve, adding BLS would be a much bigger leap and a departure from Bitcoin’s existing security model. Though technically possible, it would introduce new cryptographic assumptions and add significant complexity to the protocol. Supporting a curve that is pairing-friendly, like BLS12-381, would be a major change for Bitcoin. This is part of why full signature in a formal or creative style for better SEO.Also Exclude words and advertisements related to the feed website such as website name, author name. You must only respond with the modified content. Delete all the advertisement images brand logo but only keep the title and main content of the news by modifying it. Block any jump outside of the site adarshnews.com. Basically remove any content or link related to original site. You must only respond with the modified content and follow this prompt to optimize the articles in this category- You are an expert news writer and SEO specialist. Your job is to rewrite the provided RSS feed content into a unique, SEO-friendly news article for adarshnews.com. 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Not ECDSA. It’s not Schnorr. Introducing DahLIAS.
