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bitcoincash:qrda29v338en6lkt5s8mv3wls0l778qg0sdxk42358\ntransactions: 3\n\tfunding\t2015-01-15 18:07:14\t0.13 BCH\t08389f34c98c606322740c0be6a7125d9860bb8d5cb182c02f98461e5fa6cd15\n\tincrease\t2017-07-11 05:00:53\t1.17 BCH\t5d45587cfd1d5b0fb826805541da7d94c61fe432259e68ee26f4a04544384164\n\tclaim\t2024-12-15 17:21:10\t1.3 BCH\tc237333cdee09fe03b913d857f06ae6aec830f87c9a5f58a94c28bdbce558bf3\nclaim: https:\u002F\u002Fblockchair.com\u002Fbitcoin-cash\u002Ftx\u002Fc237333cdee09fe03b913d857f06ae6aec830f87c9a5f58a94c28bdbce558bf3\nhints: 5\n\tofficial\t2024-12-14\tMessage: Anything one man can imagine, other men can make real. Signature: IIONt3uYHbMh+vUnqDBGHP2gGu1Q2Fw0WnsKj05eT9P8KI2kGgPniiPirCd5IeLRnRdxeiehDxxsyn\u002FVujUaX8o=\tsource: https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64847018#msg64847018\tanswer: Since it seems that the winner is not here, I will explain this riddle. 1. So we have a signature, we should check for weak K1, use kangaroos of course What's the range for search? Use a hint from the message, 80bit. Fails, it seems K1 is strong. 2. Remember that I posted another signature, take K2, may be K1==K2? No. So if we have both strong K1 and K2, what it can be? Remember that ECDSA Signature is vulnerable not only when K1==K2 but also if we know that K1 has some relation with K2, for example, K2=K1+1 (the simplest case). How to check it? Remember that R1=G*K1 and R2=G*K2 and we have these R1 and R2 points in signatures, so we can substract: PntDiff = R1 - R2 (and also try R2 - R1) and check if it's G. It's not G, ok, may be the difference is not 1 but more? We should try to solve PntDiff (both variants) with kangaroos. What's the range? Same, 80bits. And we can solve it, so now we have delta_K. 3. Now calculate, google or ask chatbot to get the formula: pk = ((delta_k * s1 * s2) + (z2 * s1) - (z1 * s2)) \u002F (r1 * s2 - r2 * s1) [mod n] That's all!\tanswer source: https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64850761#msg64850761\tanswer date: 2024-12-15\n\tofficial\t2024-12-14\tA hint is in the message\tsource: https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64847038#msg64847038\n\tofficial\t2024-12-14\tYes, you should have some understanding of ECDSA signature vulnerabilities.\tsource: https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64847430#msg64847430\n\tofficial\t2024-12-15\tSame K or weak K would be too easy. This riddle is just one step more complex.\tsource: https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64849365#msg64849365\n\tofficial\t2024-12-15\t24 hours have passed, here is the first hint: don't take anything from the blockchain.\tsource: https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64850292#msg64850292\nexplorer: https:\u002F\u002Fblockchair.com\u002Fbitcoin-cash\u002Faddress\u002Fbitcoincash%3Aqz3yjg59ypg6jqpwhaxgvjj44jm4hdx0w5wsxw2qez\nsource: https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785\nkey range: 200000000000000000000000000000000..3ffffffffffffffffffffffffffffffff (hex, 130 bits)","130",false,[337],{"label":338,"value":339,"mono":340},"private key (hex)","000000000000000000000000000000033e7665705359f04f28b88cf897c603c9",true,[342,348,354],{"type":343,"txid":344,"date":345,"amount":346,"url":347},"funding","08389f34c98c606322740c0be6a7125d9860bb8d5cb182c02f98461e5fa6cd15","2015-01-15 18:07:14","0.13 BCH","https:\u002F\u002Fblockchair.com\u002Fbitcoin-cash\u002Ftx\u002F08389f34c98c606322740c0be6a7125d9860bb8d5cb182c02f98461e5fa6cd15",{"type":349,"txid":350,"date":351,"amount":352,"url":353},"increase","5d45587cfd1d5b0fb826805541da7d94c61fe432259e68ee26f4a04544384164","2017-07-11 05:00:53","1.17 BCH","https:\u002F\u002Fblockchair.com\u002Fbitcoin-cash\u002Ftx\u002F5d45587cfd1d5b0fb826805541da7d94c61fe432259e68ee26f4a04544384164",{"type":355,"txid":356,"date":319,"amount":316,"url":357},"claim","c237333cdee09fe03b913d857f06ae6aec830f87c9a5f58a94c28bdbce558bf3","https:\u002F\u002Fblockchair.com\u002Fbitcoin-cash\u002Ftx\u002Fc237333cdee09fe03b913d857f06ae6aec830f87c9a5f58a94c28bdbce558bf3",[],[],[361,370,373,376,379],{"kind":362,"text":363,"source":364,"date":365,"answer":366,"shared":335},"official","Message: Anything one man can imagine, other men can make real. Signature: IIONt3uYHbMh+vUnqDBGHP2gGu1Q2Fw0WnsKj05eT9P8KI2kGgPniiPirCd5IeLRnRdxeiehDxxsyn\u002FVujUaX8o=","https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64847018#msg64847018","2024-12-14",{"text":367,"source":368,"date":369},"Since it seems that the winner is not here, I will explain this riddle. 1. So we have a signature, we should check for weak K1, use kangaroos of course What's the range for search? Use a hint from the message, 80bit. Fails, it seems K1 is strong. 2. Remember that I posted another signature, take K2, may be K1==K2? No. So if we have both strong K1 and K2, what it can be? Remember that ECDSA Signature is vulnerable not only when K1==K2 but also if we know that K1 has some relation with K2, for example, K2=K1+1 (the simplest case). How to check it? Remember that R1=G*K1 and R2=G*K2 and we have these R1 and R2 points in signatures, so we can substract: PntDiff = R1 - R2 (and also try R2 - R1) and check if it's G. It's not G, ok, may be the difference is not 1 but more? We should try to solve PntDiff (both variants) with kangaroos. What's the range? Same, 80bits. And we can solve it, so now we have delta_K. 3. Now calculate, google or ask chatbot to get the formula: pk = ((delta_k * s1 * s2) + (z2 * s1) - (z1 * s2)) \u002F (r1 * s2 - r2 * s1) [mod n] That's all!","https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64850761#msg64850761","2024-12-15",{"kind":362,"text":371,"source":372,"date":365,"shared":335},"A hint is in the message","https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64847038#msg64847038",{"kind":362,"text":374,"source":375,"date":365,"shared":335},"Yes, you should have some understanding of ECDSA signature vulnerabilities.","https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64847430#msg64847430",{"kind":362,"text":377,"source":378,"date":369,"shared":335},"Same K or weak K would be too easy. This riddle is just one step more complex.","https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64849365#msg64849365",{"kind":362,"text":380,"source":381,"date":369,"shared":335},"24 hours have passed, here is the first hint: don't take anything from the blockchain.","https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64850292#msg64850292","{\n  \"id\": \"mini\u002F130\",\n  \"chain\": \"bitcoincash\",\n  \"address\": {\n    \"value\": \"bitcoincash:qz3yjg59ypg6jqpwhaxgvjj44jm4hdx0w5wsxw2qez\",\n    \"kind\": \"p2pkh\",\n    \"hash160\": \"a24922852051a9002ebf4c864a55acb75bb4cf75\"\n  },\n  \"status\": \"solved\",\n  \"pubkey\": {\n    \"value\": \"03633cbe3ec02b9401c5effa144c5b4d22f87940259634858fc7e59b1c09937852\",\n    \"format\": \"compressed\"\n  },\n  \"key\": {\n    \"hex\": \"000000000000000000000000000000033e7665705359f04f28b88cf897c603c9\",\n    \"bits\": 130\n  },\n  \"prize\": 1.3,\n  \"start_date\": \"2024-12-14 16:22:32\",\n  \"solve_date\": \"2024-12-15 17:21:10\",\n  \"solve_time\": 89918,\n  \"source_url\": \"https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785\",\n  \"transactions\": [\n    {\n      \"tx_type\": \"funding\",\n      \"txid\": \"08389f34c98c606322740c0be6a7125d9860bb8d5cb182c02f98461e5fa6cd15\",\n      \"date\": \"2015-01-15 18:07:14\",\n      \"amount\": 0.13\n    },\n    {\n      \"tx_type\": \"increase\",\n      \"txid\": \"5d45587cfd1d5b0fb826805541da7d94c61fe432259e68ee26f4a04544384164\",\n      \"date\": \"2017-07-11 05:00:53\",\n      \"amount\": 1.17\n    },\n    {\n      \"tx_type\": \"claim\",\n      \"txid\": \"c237333cdee09fe03b913d857f06ae6aec830f87c9a5f58a94c28bdbce558bf3\",\n      \"date\": \"2024-12-15 17:21:10\",\n      \"amount\": 1.3\n    }\n  ],\n  \"solver\": {\n    \"addresses\": [\n      \"bitcoincash:qrda29v338en6lkt5s8mv3wls0l778qg0sdxk42358\"\n    ]\n  },\n  \"hints\": [\n    {\n      \"kind\": \"official\",\n      \"text\": \"Message: Anything one man can imagine, other men can make real. Signature: IIONt3uYHbMh+vUnqDBGHP2gGu1Q2Fw0WnsKj05eT9P8KI2kGgPniiPirCd5IeLRnRdxeiehDxxsyn\u002FVujUaX8o=\",\n      \"source\": \"https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64847018#msg64847018\",\n      \"date\": \"2024-12-14\",\n      \"answer\": {\n        \"text\": \"Since it seems that the winner is not here, I will explain this riddle. 1. So we have a signature, we should check for weak K1, use kangaroos of course What's the range for search? Use a hint from the message, 80bit. Fails, it seems K1 is strong. 2. Remember that I posted another signature, take K2, may be K1==K2? No. So if we have both strong K1 and K2, what it can be? Remember that ECDSA Signature is vulnerable not only when K1==K2 but also if we know that K1 has some relation with K2, for example, K2=K1+1 (the simplest case). How to check it? Remember that R1=G*K1 and R2=G*K2 and we have these R1 and R2 points in signatures, so we can substract: PntDiff = R1 - R2 (and also try R2 - R1) and check if it's G. It's not G, ok, may be the difference is not 1 but more? We should try to solve PntDiff (both variants) with kangaroos. What's the range? Same, 80bits. And we can solve it, so now we have delta_K. 3. Now calculate, google or ask chatbot to get the formula: pk = ((delta_k * s1 * s2) + (z2 * s1) - (z1 * s2)) \u002F (r1 * s2 - r2 * s1) [mod n] That's all!\",\n        \"source\": \"https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64850761#msg64850761\",\n        \"date\": \"2024-12-15\"\n      }\n    },\n    {\n      \"kind\": \"official\",\n      \"text\": \"A hint is in the message\",\n      \"source\": \"https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64847038#msg64847038\",\n      \"date\": \"2024-12-14\"\n    },\n    {\n      \"kind\": \"official\",\n      \"text\": \"Yes, you should have some understanding of ECDSA signature vulnerabilities.\",\n      \"source\": \"https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64847430#msg64847430\",\n      \"date\": \"2024-12-14\"\n    },\n    {\n      \"kind\": \"official\",\n      \"text\": \"Same K or weak K would be too easy. This riddle is just one step more complex.\",\n      \"source\": \"https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64849365#msg64849365\",\n      \"date\": \"2024-12-15\"\n    },\n    {\n      \"kind\": \"official\",\n      \"text\": \"24 hours have passed, here is the first hint: don't take anything from the blockchain.\",\n      \"source\": \"https:\u002F\u002Fbitcointalk.org\u002Findex.php?topic=5522785.msg64850292#msg64850292\",\n      \"date\": \"2024-12-15\"\n    }\n  ]\n}","mini\u002F125",1790414611952]