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A comment on Tokyo-based cryptocurrency exchange hacked, losing $530M: NHK. Parent comment

Re:Tokyo-based cryptocurrency exchange hacked, losing $530M:... by KMag on Friday January 26, 2018 @05:06PM (#16243284)
Too bad Bitcoin uses ECDSA instead of Ed25519 (or any other signature algorithm supporting threshold signatures). With threshold signatures, you don't even need something in the wallet saying "any N of the following M", you could just give secret shares to those M parties, and any N of them could collaborate to sign something using your single public key.
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Re:Tokyo-based cryptocurrency exchange hacked, losing $530M:... by glitch003 on Friday January 26, 2018 @06:40PM (#16243815)
You could just do that anyway by running Shamir's Secret Sharing Scheme on a Bitcoin private key, splitting the key into M parts where any N of M parts can be combined to recover the original private key.
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Re:Tokyo-based cryptocurrency exchange hacked, losing $530M:... by KMag on Friday January 26, 2018 @07:37PM (#16244104)
That's a fair point, but threshold signatures are more generally useful, such as N of M board members authorizing payment to X, without having to place trust in a single board member not to change the transaction to a different amount or address.
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