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    Bitcoin Daily Discussion, February 04, 2019

    February 04, 2019

    Bitcoin Daily Discussion, February 04, 2019

    Daily Discussion, February 04, 2019

    Posted: 03 Feb 2019 11:00 PM PST

    Please utilize this sticky thread for all general Bitcoin discussions! If you see posts on the front page or /r/Bitcoin/new which are better suited for this daily discussion thread, please help out by directing the OP to this thread instead. Thank you!

    If you don't get an answer to your question, you can try phrasing it differently or commenting again tomorrow.

    We have a couple chat rooms now!

    Please check the previous discussion thread for unanswered questions.

    submitted by /u/rBitcoinMod
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    Monday Art - Brian Romero

    Posted: 03 Feb 2019 10:48 PM PST

    Times of Israel article reads, "There was no immediate reply from Bitcoin."

    Posted: 03 Feb 2019 11:26 PM PST

    Bitcoin Global Legality Map. Feel free to suggest changes.

    Posted: 03 Feb 2019 07:26 PM PST

    Australian Banking Royal Commission - 24 Criminal Offences. 76 Recommendations.

    Posted: 03 Feb 2019 11:15 PM PST

    Monday Art - Christophe Catelain

    Posted: 03 Feb 2019 10:47 PM PST

    In 1998, Wei Dai came up with his ingenious idea “b-money”. Satoshi actually reached out to him for some advice and feedback while writing the Bitcoin white paper, but Dai never responded.

    Posted: 04 Feb 2019 12:35 AM PST

    The current impact of institutional investing in Bitcoin and what that means for the community

    Posted: 03 Feb 2019 09:17 PM PST

    The first hostel in Chile which accept bitcoins. And why it’s important to actually spend bitcoins for the blockchain adoption.

    Posted: 03 Feb 2019 05:57 PM PST

    Pictures of my Bitcoin blockchain satellite receiver setup

    Posted: 03 Feb 2019 06:19 PM PST

    Remember, when the price next starts to rally. Crypto-experts appear out of the cracks.

    Posted: 03 Feb 2019 02:54 PM PST

    German Whisky online store now accepts Bitcoin :)

    Posted: 04 Feb 2019 03:35 AM PST

    Attack surface on bitcoin is shrinking: Taproot to increase privacy and fungibility of BTC

    Posted: 03 Feb 2019 12:48 PM PST

    Meet the Man Who Wants to Make Crypto so Simple Your Grandma Can Use it - CCN

    Posted: 03 Feb 2019 11:18 PM PST

    You can use bitrefill with LN for Uber/Amazon/Reddit/flights/hotels/Spotify/Steam/eBay/iTunes/GooglePlay/BestBuy..

    Posted: 03 Feb 2019 11:26 AM PST

    Earlier this week a crypto exchange revealed that they are unable to access ~26,500 Bitcoin that were in their possession. That means there are 26,500 less BTC available of the 21M total created. Eventually everyone will understand scarcity.

    Posted: 03 Feb 2019 09:21 AM PST

    Australian Banking Royal Commission Concludes - 24 Criminal Acts, Banks To Face Criminal Charges

    Posted: 04 Feb 2019 02:50 AM PST

    Investigation proves an exchange (Quadriga) ran a fractional reserve

    Posted: 03 Feb 2019 02:19 PM PST

    ECDSA - R and S being the same for different Zs

    Posted: 04 Feb 2019 03:08 AM PST

    Hi you all

    I notice some transactions that have the same R and S values for signature, despite having a different message Z:

    Example 1:

    Transaction 1: 

    TxID: ec3627ae44cc85c30da27fedc0751c92cfaffc05328b85a054765513d288bf37 vout: 19 R=00974018093b122680c81ddd2be6f05e9d3d005d8b41db51d58b9f93e426236660 S=3dc7e933637e9d4decd46b9040927d0a87dfe3df2806dbc8db07ebc0aa72d7fe Z=5f24913c02797f020f71b262c0c2be13f8f02e2bf29c21875d4290bc0cc4e496 Payee address: 1JCcf2h7Bin8oRgWcd7CBYN2ZMR23X1xzw

    Transaction 2: 

    TxID: 7979a96fc15c2beaa111c9cc54e0e6238772b4cfbac383c6e367e87774ba1032 vout: 27 R=00974018093b122680c81ddd2be6f05e9d3d005d8b41db51d58b9f93e426236660 S=3dc7e933637e9d4decd46b9040927d0a87dfe3df2806dbc8db07ebc0aa72d7fe Z=d9d57158ab5975b7c630078b98db56d668e6cd1f39098fdc622ca0e7dd2a99bc Payee address: 1JCcf2h7Bin8oRgWcd7CBYN2ZMR23X1xzw

    Example 2:

    Transaction 1:

    TxID: 4e47b00e37cd8d890e8b21005e78406e2f01447689b9b924735de0126026eaf4 vout: 8 R=6779be5b1128d60f2aa8e4ef143e6221354dc778869dc3d860f25bde5ed80f29 S=1e5acd9d363e0af10bf7d2a8659d988f2d797f99a4dc4749ea20257628fa9dd8 Z=48bf0268d902728615dd36c82a1f58bb907fa48d731cbb1339ad18b33d31fdfe Payee address: 1595PUMXzkayeCRo5UHxoPpc2qGRvZfEXe

    Transaction 2: 

    TxID: d86990d5940af3b30360376444cb66677c9dcdf94babf5b19ff5bf6d80a256c8 vout: 11 R=6779be5b1128d60f2aa8e4ef143e6221354dc778869dc3d860f25bde5ed80f29 S=1e5acd9d363e0af10bf7d2a8659d988f2d797f99a4dc4749ea20257628fa9dd8 Z=dac933e6d78cf34d6f8c9fc768e67b6e683cfd79abe5f80cf790d3fecd00e545 Payee address: 1595PUMXzkayeCRo5UHxoPpc2qGRvZfEXe

    As we know, S = ( Z + privKey * R) / sk . As privKey, R and sk are the same in both examples, a different Z should result in a different S. Does someone knows how these transactions got the same S?

    I can only think of sk not being the same for both transactions, which means their public keys are symmetrical (as R is the same). This is improbable by itself, but resulting in the same S is even less probable.

    PS1: These addresses are not mine. They are in the blockchain.

    PS2: This is only a mathematical curiosity of mine.

    PS3: Nice console :-)

    submitted by /u/sauloqf
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    Monday Art - Marguerite deCourcelle

    Posted: 03 Feb 2019 10:48 PM PST

    Mathematically-determined scarcity makes Bitcoin a better store of value than gold on the long term

    Posted: 03 Feb 2019 09:12 AM PST

    Bitfury Partners to Launch Bitcoin Mining Centers in Paraguay - CoinDesk

    Posted: 04 Feb 2019 02:37 AM PST

    Bitcoin [BTC] news: Florida court argues that Bitcoin is legal tender

    Posted: 04 Feb 2019 02:28 AM PST

    Millions in Lost Bitcoins are gone forever. What happens next?

    Posted: 04 Feb 2019 02:28 AM PST

    Proof of Keys doesn’t sound so extreme with two-factor authentication used as a vulnerability. I don’t see much of a future for Banks, but there’s a lot to be said about the #Bankchain ��

    Posted: 03 Feb 2019 06:26 PM PST
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