-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Commit protocol provides both better user experience and better security.
Dňa 6. februára 2015 1:49:12 CET používateľ Paul Puey <p...@airbitz.co> napísal: >The trust can be considered bootstrapped by visual verification of the >address prefix. If we are really concerned about someone jamming a >Bluetooth signal in a coffeeshop then the UI can encourage verification >of the prefix. Much like how regular Bluetooth requires 'pairing' via >entering a 4-6 digit code. > > > >Paul Puey CEO / Co-Founder, Airbitz Inc >619.850.8624 | http://airbitz.co | San Diego > > > > >On Feb 5, 2015, at 3:46 PM, Eric Voskuil <e...@voskuil.org> wrote: > >On 02/05/2015 03:36 PM, MⒶrtin HⒶboⓋštiak wrote: >>> A BIP-70 signed payment request in the initial broadcast can resolve >the >>> integrity issues, but because of the public nature of the broadcast >>> coupled with strong public identity, the privacy compromise is much >>> worse. Now transactions are cryptographically tainted. >>> >>> This is also the problem with BIP-70 over the web. TLS and other >>> security precautions aside, an interloper on the communication, >desktop, >>> datacenter, etc., can capture payment requests and strongly >correlate >>> transactions to identities in an automated manner. The payment >request >>> must be kept private between the parties, and that's hard to do. >> >> What about using encryption with forward secrecy? Merchant would >> generate signed request containing public ECDH part, buyer would send >> back transaction encrypted with ECDH and his public ECDH part. If >> receiving address/amount is meant to be private, use commit protocol >> (see ZRTP/RedPhone) and short authentication phrase (which is hard to >> spoof thanks to commit protocol - see RedPhone)? > >Hi Martin, > >The problem is that you need to verify the ownership of the public key. >A MITM can substitute the key. If you don't have verifiable identity >associated with the public key (PKI/WoT), you need a shared secret >(such >as a secret phrase). But the problem is then establishing that secret >over a public channel. > >You can bootstrap a private session over the untrusted network using a >trusted public key (PKI/WoT). But the presumption is that you are >already doing this over the web (using TLS). That process is subject to >attack at the CA. WoT is not subject to a CA attack, because it's >decentralized. But it's also not sufficiently deployed for some >scenarios. > >e - -- Odoslané z môjho Android zariadenia pomocou K-9 Mail. -----BEGIN PGP SIGNATURE----- Version: APG v1.1.1 iI8EAREKADcFAlTUD/AwHE1hcnRpbiBIYWJvdmF0aWFrIDxtYXJ0aW4uaGFib3Zz dGlha0BnbWFpbC5jb20+AAoJED6C3NvqapyUPwgA/0eVlJYeA3fYmVb1zVA8j1l/ kjOhc9CIDYL9ifk8N0t/AP4mC4CwmZoNXqr24le5WdYeBeyHMiDMtJrRfwQkN1LG dQ== =pY76 -----END PGP SIGNATURE----- ------------------------------------------------------------------------------ Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
