From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Fri, 06 Mar 2026 08:21:33 -0800 Received: from mail-ot1-f55.google.com ([209.85.210.55]) by mail.fairlystable.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94.2) (envelope-from ) id 1vyXvg-0007PT-Tx for bitcoindev@gnusha.org; Fri, 06 Mar 2026 08:21:33 -0800 Received: by mail-ot1-f55.google.com with SMTP id 46e09a7af769-7d4cf783c73sf129919536a34.3 for ; Fri, 06 Mar 2026 08:21:32 -0800 (PST) ARC-Seal: i=3; a=rsa-sha256; t=1772814087; cv=pass; d=google.com; s=arc-20240605; b=IoybYMdQyPzvgIwRJ1tkv7kiAZE3gc03/xI5Y25lO1naR6bmNFIyBfZ7g9FpD8WvYv 3F5WymEcGxyP9yapklAutu+bVE1QXLO7WUbXh3tJpZ0I7xSoRg+x6Be85Z8HCwTA/ivE Y+Piar3eJEK5kNmq9GbfvKWUpAYfLJNRdk8DRqUN8K4QtKeiqRuGqUAfgwNIYkC52Gdi MiU5Y2jl7xPbykprW6FC73PDtpurswLYLlkJ0eHfSfcRPs5t51w/Cg9RpuCTrM9gfiZ+ 8DxPIizxAR1gFb3kPl6I84d8iIMDOAEdMDWK6VJ9JGSE1CNZ2mlE5gwKLeMv0Og/4HsA mXSg== ARC-Message-Signature: i=3; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20240605; h=list-unsubscribe:list-subscribe:list-archive:list-help:list-post :list-id:mailing-list:precedence:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:sender:dkim-signature :dkim-signature; bh=wTpscOF8NnpYoWGiBUzxMgogvrsFQTEL1PCWhEdgqxU=; fh=1Zs44pqUFKtZPrGJhbZ/4BcSMVt3Hzw2tdn9gsQPheo=; b=EnB491P/NsYivE1L2hMs7x0hMnHfMonb2mTeLzEP5CuJ2GmJAz20HIUB0E5XFaeemL SVFQZNH6LeyXp5cTdmlE/Tq2y3xnOiD8xlRirHv1+X1HvqeD6kleBy1M9YWBZxmL6GeH SBWeqDN1eucbf8nIrxEZ96xH7cYYNXLkFRzsmGlvnvTPBgEZ6O9BU/unWRkgcuOZtawr 6lEvjgUwAz4E8pZj2NjMlfo+JVbzOEtqyxHLaxLOE4OBInaXT6+QO3i2qlyBW5BVI1b/ 5Ol06DzFzpXo7PIho9JkmN5ZwYAOE4Dxv5Kv+EoitL3ptvdGfr9jQ1ysh4AQiT+xyA+0 3/Rg==; darn=gnusha.org ARC-Authentication-Results: i=3; gmr-mx.google.com; dkim=pass header.i=@gmail.com header.s=20230601 header.b=GzNqaGyK; arc=pass (i=1); spf=pass (google.com: domain of ianquantum2027@gmail.com designates 2a00:1450:4864:20::631 as permitted sender) smtp.mailfrom=ianquantum2027@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com; dara=pass header.i=@googlegroups.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlegroups.com; s=20230601; t=1772814087; x=1773418887; darn=gnusha.org; h=list-unsubscribe:list-subscribe:list-archive:list-help:list-post :list-id:mailing-list:precedence:x-original-authentication-results :x-original-sender:cc:to:subject:message-id:date:from:in-reply-to :references:mime-version:sender:from:to:cc:subject:date:message-id :reply-to; bh=wTpscOF8NnpYoWGiBUzxMgogvrsFQTEL1PCWhEdgqxU=; b=tK1KjcpdB/PYJ7hgJ1fRt9S+73vLSP9rx4QwOhwsGH+7e3UT1rc+yQWMdLd0TDy+jT zzFu/FjKzgmtnifmzikhFkIYIsgpRJHgjChVhSYWwabiOnIB9Y/nUPpVibNlzr9C/pO4 skwFcEnG//cYzyI9SR/4W6gciL/0x00Hp0ftOegm7OMrIgtz/zC1KeLc4q2Ip2yFxreX 5uvza+ajHil4p4pL/Je9bH8phH+hzraC5BIvqfhPaHpVvS+MIz9FIgyhlXDaMgde6Faf mhvAS2gfGQ7zPDrL66kp7kdB5oXDSFiUroY7hte1VxfiCsmpHvmOmgWvmFOcTa/kCR/4 al4Q== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1772814087; x=1773418887; darn=gnusha.org; h=list-unsubscribe:list-subscribe:list-archive:list-help:list-post :list-id:mailing-list:precedence:x-original-authentication-results :x-original-sender:cc:to:subject:message-id:date:from:in-reply-to :references:mime-version:from:to:cc:subject:date:message-id:reply-to; bh=wTpscOF8NnpYoWGiBUzxMgogvrsFQTEL1PCWhEdgqxU=; b=CdGGnbVUShqqF1Uvj8R649XotSZNIPDEOrgHsDxIoVtaX3F3tpl7ixIVfTTy1jjQ6n /i4uM1BqZEQjm1/s0c+HF/aAMM22qdkPxzhCO3q52Zc3thZnyJBysNUZTkGoMnMJczAv zYnJBtKd4ttmDZK9rwnhdrgRCdviZtes8rywVyYSNCSuj+rac+fW/y4RTuMbN5wy5Ktb gbYmftEsvTzbbXAicH4cAWhuNmhu+/iaOJIZYurRkF/hfQUgmmO8UMhdpvPnSRH+qBbS cGNlQOe+eFsHSpQsSqOZ9g4rw4HY/f3cJwhJtrg9NyQqegE51jhiQFEdUVC5LUBaiYWY TGZA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772814087; x=1773418887; h=list-unsubscribe:list-subscribe:list-archive:list-help:list-post :list-id:mailing-list:precedence:x-original-authentication-results :x-original-sender:cc:to:subject:message-id:date:from:in-reply-to :references:mime-version:x-gm-gg:x-beenthere:x-gm-message-state :sender:from:to:cc:subject:date:message-id:reply-to; bh=wTpscOF8NnpYoWGiBUzxMgogvrsFQTEL1PCWhEdgqxU=; b=KSDzQU2dOTaEvRZ3IFSFtW0fRhCPDOPa/AJbuc8QQOfg03Fe+06u5rnfuQ25l1v77V mwk4lYyKCXH3MUW6lWgMoSqn4HNlix3OupVdZmwXbTQA5t5WCtXn1LPHUW+1wraqi3/r oE4xm12TpyegO3SIGfWBVyTv0DyQH2f4WwcPhdn1la7WLPcAOU0TRCCLyiJP9JKRoF2l LyPJqoW0r3z8Wnb9JW4IfAv8mkaWLAJGYZPf8cuuaMsLRhXHHvvExEc8nMwQdqtwtNd1 64rpY2C1qYG7Qqkdnai6Nf8zjrKHgsJJ+I4J7wcHEHr1j0jcTFRc8YZzlOiZfYtyNVTN HFxg== Sender: bitcoindev@googlegroups.com X-Forwarded-Encrypted: i=3; AJvYcCWBhqLAo6WiY716w0wX7Sxj0etkpsOCO8q1I5ko0Ta8+XjQJNwjta433ZE8gexBGpQ3dVTYqRUN/WSp@gnusha.org X-Gm-Message-State: AOJu0Yw+jXkjCl8h6Mq/jax91XgFbIyQX1L7+56Ci2fr5DsqTC9iMJbh QbP0/iQTqvbFPjC8FbjzsuZOzg9Az11unu9GbEPVbXCjJaEOx4iN0eDV X-Received: by 2002:a05:6820:81e:b0:679:e7b2:9fc0 with SMTP id 006d021491bc7-67b9bc65f08mr1742077eaf.15.1772814086615; Fri, 06 Mar 2026 08:21:26 -0800 (PST) X-BeenThere: bitcoindev@googlegroups.com; h="AV1CL+HCrZLODGQt+UO1i34F7QMfDk4XF8eVAWLlqrLlKSyGhQ==" Received: by 2002:a05:6871:522a:b0:416:7e0c:55ca with SMTP id 586e51a60fabf-416be68ac16ls1243434fac.0.-pod-prod-07-us; Fri, 06 Mar 2026 08:21:19 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCVtOQGHZy7gYymF029onsdbRkuCkWlytUbeEPpvDhoe2mIiEwXgJJwNyudU0RCdksFepsT7Z8FQOg+M@googlegroups.com X-Received: by 2002:a05:6808:2228:b0:459:98aa:6720 with SMTP id 5614622812f47-466dcb91cf6mr1347519b6e.52.1772814079708; Fri, 06 Mar 2026 08:21:19 -0800 (PST) Received: by 2002:a05:600c:8115:b0:483:6d47:ea7 with SMTP id 5b1f17b1804b1-48524066369ms5e9; Fri, 6 Mar 2026 07:37:17 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCWGOWbuFvo8SbknSS0vVwKtVbfQ3+bIT/CQlO/+ZeVGJiUQ3UfUWc9/tKmSZU+nsm5rqtLzeANOR5RU@googlegroups.com X-Received: by 2002:a05:6000:2886:b0:439:b7c9:2edb with SMTP id ffacd0b85a97d-439da35c8e3mr4644855f8f.25.1772811435460; Fri, 06 Mar 2026 07:37:15 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1772811435; cv=pass; d=google.com; s=arc-20240605; b=cgXjRDMvM9S4Pw5uQgiirMHDeqGSMWhHHUgo8hZruGDSqGJkfabjJiMVL8aW3bhs2z BX+UWHLFeuaYxGlMSthQAakk7xHM3gV9vqIzayf4jFwm4gUTereG5OjKCCdIiRuvH7St YeVgYeaoKpn9r2CLlrXptbYblZ1FPSa6ZBQ2xbmLmlh19Y8titCdbnjcJwmOgNuWgh+g ijv9Slk4jHb6deI3rXt6wF+I0Yj+gfktYf760/IGlqsb6Xptow0oI2MQptjG73baWZWR e1LXIjGxaQHJNHostGXhENjWA1C8sEzJFiQjbDZq9UdSIEvmcToo86x2su/UoPZdHfzz 4wSQ== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20240605; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:dkim-signature; bh=KvnKa7rZ6vIDStyYdGNcW/Ga/39/3P51THpFJn04obM=; fh=8NOzq2kdymBCzcKEcDxwmLWZmYtR9WB8nkd9/nfGV3E=; b=Qb3/Dzrsm1pnZ/5CiX5FkYQEHfbZZdVOE92Hx6obfoirKOYTvrBlm46gWYBITmhIyK l71m/D0NanJ2xfhEHQRJtM+wB38dmqbHSzvyKrdUMb54mxgR77ldZSwq6dzXZkhdsqFg 8UKTnBTJHQBUcH3OrIU1GH9cYJsFND1iPZimfh6uILMmTfBRPRHuOyekkFSyZ/jkYnVR 5+v8JqK/uhNPpVlLLVRbiKbZm/hJJw/R8YLqRGlzD0UaJhXRBQQTMCaCEz4O7pz+BkLd snfU+/ruGGlPPkypJndao0kLyINFsYusPPutlNVc2b9wc5myMsTpIrpZ+TYF+mQ+0tDi AMWg==; dara=google.com ARC-Authentication-Results: i=2; gmr-mx.google.com; dkim=pass header.i=@gmail.com header.s=20230601 header.b=GzNqaGyK; arc=pass (i=1); spf=pass (google.com: domain of ianquantum2027@gmail.com designates 2a00:1450:4864:20::631 as permitted sender) smtp.mailfrom=ianquantum2027@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com; dara=pass header.i=@googlegroups.com Received: from mail-ej1-x631.google.com (mail-ej1-x631.google.com. [2a00:1450:4864:20::631]) by gmr-mx.google.com with ESMTPS id ffacd0b85a97d-439dad5cc6csi44533f8f.5.2026.03.06.07.37.15 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 06 Mar 2026 07:37:15 -0800 (PST) Received-SPF: pass (google.com: domain of ianquantum2027@gmail.com designates 2a00:1450:4864:20::631 as permitted sender) client-ip=2a00:1450:4864:20::631; Received: by mail-ej1-x631.google.com with SMTP id a640c23a62f3a-b8f9568e074so1599762466b.0 for ; Fri, 06 Mar 2026 07:37:15 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1772811435; cv=none; d=google.com; s=arc-20240605; b=a11fGC+0+qkLu/I4+pvQtkYJs7WnzC7nibisHY6EGdKA3Mwa4WV87c/3M4oEuJc2d4 FUAVwFHt1NO2nckUrwmU9T2mzGqDakIfqmNlvUcFSLZjoQq1sPsKehIifc09/3zEaed8 EbA2vljEIqgloEIMJWQJ1J8RX9NO+t/bOH+FW5j4+Gu4W+EIz7S0NVxI/nfobvLIyNE0 oI+q/EHI8kn/Rqj+PIdyRzIT1naG1pOGskPVGU2mdftJLJd6leDvKOPsENtWEHnn6Ntw 6zGcxHEbGsWxn1DCgwOXjgVWp0L3W09uU6XUCK//6CVDktCytDkbgBbgZab3HJaDgtgG 4tHg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20240605; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:dkim-signature; bh=KvnKa7rZ6vIDStyYdGNcW/Ga/39/3P51THpFJn04obM=; fh=8NOzq2kdymBCzcKEcDxwmLWZmYtR9WB8nkd9/nfGV3E=; b=jZ8eCSBLubfEcrXA+BtrCVn93VDoh1n8gcsC0cyXFUAhae1dOlAW3vK02vEzKodDSQ WSy9cLsri35hfBOJDCmTyRvTMNpA3hspNOzvi+SBbjLSI0GeSM99905i6K9APpEnlQxG RWInqCqtxDGLzLz3sjAxp914e+wckrFbDgQ/Q4FLqVEoP39Lf2G1pQY31AeWYGg8aMDN ytY1M/pb/1mx1JIpd9GXRBdrF+634/QWz8HfnF2uMOhI9Ol5efD7iryvMLT4fR2htJtK K1SQvLWVo4NJ7ewKDZM0kkJIsw2wIS6rlJIOunjX2ZIL6pYSCwxksf+lB3xuE1MlGNJx J8sg==; dara=google.com ARC-Authentication-Results: i=1; mx.google.com; arc=none X-Forwarded-Encrypted: i=1; AJvYcCXFWMzSbxMik0/n3yp0qL3Nimq8r3pSFgSu5PQkRVHIDw9jPiAxQmd4t7W+pgh1e/CSeymOXFhhTQt3@googlegroups.com X-Gm-Gg: ATEYQzy95n7lmtD+4z7XY/6QJqUzin3vVGxuvXGjICOfj5wTJrBkrhvVvTm1COERCcK VUmzSLAU0SiScPEYWG6zk3UvnirnBj5YZ8BGcn6nJ5aqyXvioYTgs5fOwWnKckuG6KEY7PJYojP uW3fU5NsQopfXkKrjQwkf2DFb+eQZMrBkUWwRHj9VciqgQbhMx3jz+2CHv6QW0o1VkGpQtffrIV oIZGeViqhFnrxoXiwgnNSPKOimlEPxl/8ZpWIPSagqknmq4P7tzsjo5ys8cck2RPtTX96CyMbAk sduCkw== X-Received: by 2002:a17:907:72d3:b0:b8e:64e:1ed with SMTP id a640c23a62f3a-b942dfb42e6mr147433266b.50.1772811434526; Fri, 06 Mar 2026 07:37:14 -0800 (PST) MIME-Version: 1.0 References: <9336f5a4-5c28-4c1b-af29-a8462b7a9377n@googlegroups.com> In-Reply-To: From: Ian Quantum Date: Fri, 6 Mar 2026 16:37:02 +0100 X-Gm-Features: AaiRm529b3rPKbXP47e8lEXoDb3bhYYQtGy_Zum_Xiy23TUIGjg-BVoFZUCzY1Y Message-ID: Subject: Re: [bitcoindev] Hourglass V2 Update To: Brandon Black Cc: Mike Casey , Bitcoin Development Mailing List Content-Type: multipart/alternative; boundary="000000000000cf0cfd064c5cd317" X-Original-Sender: ianquantum2027@gmail.com X-Original-Authentication-Results: gmr-mx.google.com; dkim=pass header.i=@gmail.com header.s=20230601 header.b=GzNqaGyK; arc=pass (i=1); spf=pass (google.com: domain of ianquantum2027@gmail.com designates 2a00:1450:4864:20::631 as permitted sender) smtp.mailfrom=ianquantum2027@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com; dara=pass header.i=@googlegroups.com Precedence: list Mailing-list: list bitcoindev@googlegroups.com; contact bitcoindev+owners@googlegroups.com List-ID: X-Google-Group-Id: 786775582512 List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , X-Spam-Score: -0.5 (/) --000000000000cf0cfd064c5cd317 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable YKYC but P2PK has been deprecated since a little in 2013 after I joined Bitcoin as one of the silent masses around 2010. What does 13 years of "deprecated" mean? Fix the cryptography, remove the unlimited 'first class' status of the ancient system. Maintenance should have a clear path to removing cruft, insecurities and deprecated systems. P2PK is all 3. "Your keys, Quantum Attacker Crypto" is the alternative. On Tue, Mar 3, 2026, 22:25 'Brandon Black' via Bitcoin Development Mailing List wrote: > Hi Mike, list. > > My personal response to this type of proposal remains a firm, and > time-unlimited, "no". > > There are, broadly speaking, two possible ways in which secp256k1 > breaks: Gradually and suddenly. > > If it's gradually then the risks to P2PK, P2TR, and public public key > (lol) coins grows gradually, most likely with some large outputs being > stolen first and liquidated in some gradual way (because the first actor > to have access to the break is likely a low time preference entity who > doesn't want to crash the price). Moreover, assuming a gradual break, we > will have long since deployed an alternative cryptosystem and everyone > will have had ample time to migrate. Those coins not migrated are fair > game. > > If it breaks suddenly, that could put us in a situation where nobody has > had a chance to migrate their coins AND the type of actors first gaining > access to the coins are more likely to be low time preference dumpers > who will fight each other for the coins using perverse miner incentives > to protect some residual value. This itself would threaten the very > tenability of the system. > > > Bitcoin has long held the philosophy of NYKNYC which implies the > reverse: YKYC. If we decided to break this for any but the most imminent > and obvious destruction of the system, we have defeated the system's > very raison d'=C3=AAtre. In other words, the only time we should limit or > disable an old cryptosystem on bitcoin is in the greatest extremity of > an immediate and total break of the cryptography wherein participants > have not had time to migrate and the break is instantly widespread. > > So, unless someone has access to secret evidence that secp256k1 is > already broken (in which case we should be disabling all such signatures > entirely, not trickling them through) we should absolutely not consider > restricting the property rights of those using any secp256k1 signature. > This is regardless of how we feel about public keys being public which > is an entirely other topic. > > For me to take a proposal of this general nature seriously, it would > have to treat all secp256k1-protected outputs the same (as the > supposed security of hashed output types relies strictly on public > information being secret). > > All the best, > > -- > --Brandon > > On 2026-02-10 (Tue) at 12:47:22 -0800, Mike Casey wrote: > > In response to feedback, the Hourglass proposal to mitigate against > > potential mass liquidation of P2PK funds has been enhanced to further > limit > > spend amounts from such outputs to only 1 bitcoin per block. > > > https://github.com/cryptoquick/bips/blob/hourglass-v2/bip-hourglass-v2.me= diawiki > > > > Prior discussion of the original Hourglass proposal: > > https://groups.google.com/g/bitcoindev/c/zmg3U117aNc/m/lDCMs9j7EAAJ > > > > Thoughts & feedback welcome! > > -- > You received this message because you are subscribed to the Google Groups > "Bitcoin Development Mailing List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to bitcoindev+unsubscribe@googlegroups.com. > To view this discussion visit > https://groups.google.com/d/msgid/bitcoindev/aadRUrmtko-uyvt2%40console. > --=20 You received this message because you are subscribed to the Google Groups "= Bitcoin Development Mailing List" group. To unsubscribe from this group and stop receiving emails from it, send an e= mail to bitcoindev+unsubscribe@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/bitcoindev/= CA%2B7C%2BcaG37zBNYPw6_qjtN6zyXh6_CSvc%3DhjSCEp4kqnEu0YWg%40mail.gmail.com. --000000000000cf0cfd064c5cd317 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
YKYC but P2PK has been deprecated since a little in 2013 = after I joined Bitcoin as one of the silent masses around 2010. What does 1= 3 years of "deprecated" mean?

Fix the cryptography, remove the unlimited 'first class' = status of the ancient system. Maintenance should have a clear path to remov= ing cruft, insecurities and deprecated systems. P2PK is all 3.=C2=A0
<= div dir=3D"auto">"Your keys, Quantum Attacker Crypto" is the alte= rnative.=C2=A0

On Tue, Mar 3, 2026, 22:25 'B= randon Black' via Bitcoin Development Mailing List <bitcoindev@googlegroups.com> wrote:
Hi Mike, list.

My personal response to this type of proposal remains a firm, and
time-unlimited, "no".

There are, broadly speaking, two possible ways in which secp256k1
breaks: Gradually and suddenly.

If it's gradually then the risks to P2PK, P2TR, and public public key (lol) coins grows gradually, most likely with some large outputs being
stolen first and liquidated in some gradual way (because the first actor to have access to the break is likely a low time preference entity who
doesn't want to crash the price). Moreover, assuming a gradual break, w= e
will have long since deployed an alternative cryptosystem and everyone
will have had ample time to migrate. Those coins not migrated are fair
game.

If it breaks suddenly, that could put us in a situation where nobody has had a chance to migrate their coins AND the type of actors first gaining access to the coins are more likely to be low time preference dumpers
who will fight each other for the coins using perverse miner incentives
to protect some residual value. This itself would threaten the very
tenability of the system.


Bitcoin has long held the philosophy of NYKNYC which implies the
reverse: YKYC. If we decided to break this for any but the most imminent and obvious destruction of the system, we have defeated the system's very raison d'=C3=AAtre. In other words, the only time we should limit = or
disable an old cryptosystem on bitcoin is in the greatest extremity of
an immediate and total break of the cryptography wherein participants
have not had time to migrate and the break is instantly widespread.

So, unless someone has access to secret evidence that secp256k1 is
already broken (in which case we should be disabling all such signatures entirely, not trickling them through) we should absolutely not consider
restricting the property rights of those using any secp256k1 signature.
This is regardless of how we feel about public keys being public which
is an entirely other topic.

For me to take a proposal of this general nature seriously, it would
have to treat all secp256k1-protected outputs the same (as the
supposed security of hashed output types relies strictly on public
information being secret).

All the best,

--
--Brandon

On 2026-02-10 (Tue) at 12:47:22 -0800, Mike Casey wrote:
> In response to feedback, the Hourglass proposal to mitigate against > potential mass liquidation of P2PK funds has been enhanced to further = limit
> spend amounts from such outputs to only 1 bitcoin per block.
> http= s://github.com/cryptoquick/bips/blob/hourglass-v2/bip-hourglass-v2.mediawik= i
>
> Prior discussion of the original Hourglass proposal:
> https://groups.go= ogle.com/g/bitcoindev/c/zmg3U117aNc/m/lDCMs9j7EAAJ
>
> Thoughts & feedback welcome!

--
You received this message because you are subscribed to the Google Groups &= quot;Bitcoin Development Mailing List" group.
To unsubscribe from this group and stop receiving emails from it, send an e= mail to bitcoindev+unsubscribe@googlegroups.com.=
To view this discussion visit https://groups.google.com/d/msgid/bitcoindev/aadRUrmtko-uyvt2%4= 0console.

--
You received this message because you are subscribed to the Google Groups &= quot;Bitcoin Development Mailing List" group.
To unsubscribe from this group and stop receiving emails from it, send an e= mail to bitcoind= ev+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.co= m/d/msgid/bitcoindev/CA%2B7C%2BcaG37zBNYPw6_qjtN6zyXh6_CSvc%3DhjSCEp4kqnEu0= YWg%40mail.gmail.com.
--000000000000cf0cfd064c5cd317--