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Fabian Jahr
599 posts
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Fabian Jahr

@fjahr
Berlin, Germany
Joined April 2011
500
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1,828
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  • user avatar
    Fabian Jahr
    @fjahr
    May 7
    I wasn't aware of my great Bitcoin villain potential until now. I could have gone to that Hover Dam @btcplusplus after all...
  • user avatar
    Fabian Jahr
    @fjahr
    Sep 13, 2025
    While I am very happy to see people running ASmap, so far I can't confirm the that it filters (pun intended) knots nodes. The following numbers are all based on a bitnodes snapshot from today that I ran some basic analysis on: Knots nodes are 86% Tor, all others are 62% Tor.
  • user avatar
    Fabian Jahr
    @fjahr
    Apr 16, 2025
    Running DahLIAS (and secp256k1lab) 😎 github.com/fjahr/cisa-pla…
    user avatar
    Jonas Nick
    Blockstream
    @n1ckler
    Apr 16, 2025
    Announcing DahLIAS! πŸŽ‰ The first crypto protocol for full cross-input signature aggregation that allows reusing Bitcoin's curve secp256k1. βœ… 64B sigs βœ… Verify is ~2x faster than half-agg'd Schnorr sigs βœ… 2-round signing Kudos to the team: @real_or_random @yannickseurin! πŸ‘‡
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  • user avatar
    Fabian Jahr
    @fjahr
    Mar 21, 2025
    Thanks a lot to @HRF for supporting my work and initiating this report. I hope it helps people understand the potential that a CISA softfork could bring to Bitcoin and why we are excited about it.
    user avatar
    Alex Gladstein πŸŒ‹ ⚑
    @gladstein
    Mar 21, 2025
    NEW: @fjahr's long-awaited research into Cross-Input Signature Aggregation This is an extremely detailed and well-written exploration of CISA as a potential next step in Bitcoin development CISA's incentive alignment between privacy and cost-savings is mind-blowing
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  • user avatar
    Fabian Jahr
    @fjahr
    Oct 30, 2024
    Awesome, congrats @achow101 and @murchandamus and thanks to all the donors!
    user avatar
    localhost research
    @lclhostresearch
    Oct 28, 2024
    1/ As Bitcoin continues to grow, so does the pool of talented individuals contributing to critical codebases. However, full-time employment opportunities for these individuals remain limited.

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