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Hash-Based Signatures for Bitcoin's Post-Quantum Future

15 replies

By Mikhail Kudinov

Involving Jonas Nick, conduition+5 others

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Original post on December 8, 2025 20:28 UTC

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Last reply on December 24, 2025 15:02 UTC

bitcoin-dev

  • Exploration of post-quantum cryptographic solutions for Bitcoin focuses on hash-based schemes.

  • Optimizations can significantly reduce hash-based signature sizes without compromising security.

  • Debate on practicalities of post-quantum solutions in Bitcoin is encouraged within the community.

QRAMP addition: Alternative to legacy freeze: “quarantine-mode” legacy spends via two-phase destination commitment

1 reply

By bnv

Involving Giulio Golinelli

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Original post on January 13, 2026 02:15 UTC

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Last reply on January 18, 2026 13:44 UTC

bitcoin-dev

  • The QRAMP introduces a quarantine mode for legacy UTXOs to remain spendable post-quantum.

  • A two-phase commit and spend flow is proposed to prevent destination substitution.

  • The concept includes fee sponsorship for commitments and seeks feedback on its technical feasibility.

Perhaps the simplest possible quantum-security upgrade

1 reply

By Erik Aronesty

Involving conduition

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Original post on December 17, 2025 20:57 UTC

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Last reply on December 18, 2025 16:11 UTC

bitcoin-dev

  • Erik suggests a quantum-resistant upgrade for Bitcoin without new signature schemes.

  • His approach integrates a new opcode for blockchain-based challenges, enhancing security.

  • The proposal maintains Bitcoin's infrastructure and encourages community-driven enhancements.

BIP352: PSBT support

29 replies

By josibake

Involving andrewtoth, achow101+3 others

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Original post on May 17, 2024 11:51 UTC

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Last reply on January 16, 2026 13:40 UTC

delvingbitcoin

  • The discussion addresses enhancing privacy in PSBTs through spending and sending capabilities.

  • A draft BIP suggests an `OutputGenerator` role for easier integration of silent payments.

  • Concerns about security and technical complexities in implementing these proposals are highlighted.

OP_CC: A simple introspection opcode to enable cheaper consolidations

14 replies

By billymcbip

Involving reardencode, sipa+5 others

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Original post on December 30, 2025 12:53 UTC

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Last reply on January 19, 2026 16:06 UTC

delvingbitcoin

  • The new Tapscript opcode, **OP_CHECKCONSOLIDATION (OP_CC)**, aims to improve Bitcoin transaction efficiency.

  • **OP_CC** reduces the blockchain space by allowing inputs from the same SPK to share a single signature.

  • This method significantly decreases data needed for UTXO consolidation, enhancing Bitcoin network scalability.

Stealth addresses using nostr

11 replies

By 1440000bytes

Involving setavenger, AdamISZ

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Original post on July 9, 2025 17:13 UTC

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Last reply on January 17, 2026 05:54 UTC

delvingbitcoin

  • Nostr uses cryptographic techniques like Bitcoin for key generation and payments.

  • It introduces encrypted notifications to enhance user experience and privacy in transactions.

  • The concept includes Python code for stealth key generation, aiming at developer adoption for secure payments.

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