* [bitcoin-dev] Built in encryption [not found] ` <CALTsm7jS+z=NJO+WPK5VtEONsD7h1m0_yQq-0EmnYiG4hXKb2Q@mail.gmail.com> @ 2018-02-19 9:21 ` Ilan Oh 2018-02-19 20:11 ` Lucas Clemente Vella 0 siblings, 1 reply; 2+ messages in thread From: Ilan Oh @ 2018-02-19 9:21 UTC (permalink / raw) To: Bitcoin Protocol Discussion [-- Attachment #1: Type: text/plain, Size: 463 bytes --] Hey guys, Features info, I know we can add text to a btc transaction and it is pretty easy, However is it possible to encrypt the data in a way that only the receiver would be able to read it in clear. And of course without having to exchange info off the network. And if not possible on bitcoin would it be possible on a sidechain or on rsk or else I have few ideas of concrete uses of it, I'm sure you guys may also think of something interesting, Thanks, [-- Attachment #2: Type: text/html, Size: 766 bytes --] ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [bitcoin-dev] Built in encryption 2018-02-19 9:21 ` [bitcoin-dev] Built in encryption Ilan Oh @ 2018-02-19 20:11 ` Lucas Clemente Vella 0 siblings, 0 replies; 2+ messages in thread From: Lucas Clemente Vella @ 2018-02-19 20:11 UTC (permalink / raw) To: Ilan Oh, Bitcoin Protocol Discussion Theoretically, if the recipient address had already disclosed the public key (i.e. already spent from that address), or shared it with you instead of (or alongside with) the address, then you can use recipient's ECDSA key to encrypt the message with ECC, as both ECDSA and ECC share the same kind of public/private key pair, according to the this link: https://crypto.stackexchange.com/questions/14662/using-ecdsa-keys-for-encryption In practice, I am not sure the nodes would broadcast such non-standard transaction (but it can be mined, nonetheless). 2018-02-19 6:21 GMT-03:00 Ilan Oh via bitcoin-dev <bitcoin-dev@lists•linuxfoundation.org>: > Hey guys, > > Features info, > I know we can add text to a btc transaction and it is pretty easy, > > However is it possible to encrypt the data in a way that only the receiver > would be able to read it in clear. > And of course without having to exchange info off the network. > > And if not possible on bitcoin would it be possible on a sidechain or on rsk > or else > > I have few ideas of concrete uses of it, I'm sure you guys may also think of > something interesting, > > Thanks, > > _______________________________________________ > bitcoin-dev mailing list > bitcoin-dev@lists•linuxfoundation.org > https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev > -- Lucas Clemente Vella lvella@gmail•com ^ permalink raw reply [flat|nested] 2+ messages in thread
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2018-02-19 9:21 ` [bitcoin-dev] Built in encryption Ilan Oh
2018-02-19 20:11 ` Lucas Clemente Vella
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