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How police tricked a ransomware gang into handing over decryption keyswww.zdnet.com/article/police-tricked-a-ransomware-gang-into-handing-over-its-decryption-keys-heres-how-they-did-it/
348 sats \ 3 comments \ @benstern 12 Nov 2022 bitcoin
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93 sats \ 1 reply \ @benstern OP 12 Nov 2022
tldr; double spending
  1. send tx1 with low fee at busy time (stays unconfirmed)
  2. tx1 appears in the mempool, receive decryption keys
  3. send tx2 with higher fee - tx1 gets invalidated
lulz
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0 sats \ 0 replies \ @south_korea_ln 13 Nov 2022
RBF?
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10 sats \ 0 replies \ @luisschwab 13 Nov 2022
That's why we say that a 0-conf transactions doesn't exist.
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