Author: Amir Taaki Date: To: Eric Voskuil CC: libbitcoin@lists.dyne.org Subject: Re: [Libbitcoin] Adding sign byte back into fetch_stealth
oh ok, makes perfect sense.
On 01/08/2015 08:23 PM, Eric Voskuil wrote: > We would flip a coin and document the required sign. This would place a constraint on the payer, but it should not be a material burden.
>
> e
>
>> On Jan 8, 2015, at 10:55 AM, Amir Taaki <genjix@???> wrote:
>>
>> oh ok. How can this be established by convention? i.e how would the
>> client know whether to use 02 or 03?
>>
>>> On 01/08/2015 07:49 PM, Eric Voskuil wrote:
>>> Maybe I'm missing something, but I thought the idea was that the sign of
>>> the ephemeral public key would be established by convention and thereby
>>> not be required in the OP_RETURN *and* not require testing of both signs.
>>>
>>> I'd be concerned that by including the sign byte, and with the payment
>>> id at 5 bytes, we would be limiting the nonce space to one byte. That
>>> may not be sufficient.
>>>
>>> e
>>>
>>>> On 01/08/2015 03:31 AM, Amir Taaki wrote:
>>>> Oh if you mean the <P:32>, that doesn't help. It still doubles the
>>>> number of rows that clients need to process.
>>>> We want to lessen the processing burden on clients, so they can use a
>>>> smaller prefix (= more data) to remain more anonymous.
>>>>
>>>>> On 01/08/2015 12:28 PM, Amir Taaki wrote:
>>>>> Yep I got rid of that, that's not staying.
>>>>> That's more the type or info byte.
>>>>>
>>>>>> On 01/08/2015 08:25 AM, Peter Todd wrote:
>>>>>>> On Thu, Jan 08, 2015 at 05:11:53AM +0100, Amir Taaki wrote:
>>>>>>> This increases the number of client side computations, which reduces the
>>>>>>> anonymity. It is trivial for the server to store this data and halves
>>>>>>> the computation workload for the client, thereby increasing the
>>>>>>> acceptable working dataset & improving anonymity for the client.
>>>>>>
>>>>>> Good point.
>>>>>>
>>>>>> However, what about changing the stealth standard itself to not have the
>>>>>> sign byte in the OP_RETURN? I believe we've discussed this, along with
>>>>>> getting rid of that version byte. We're still at the point where we can
>>>>>> change things.
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Re: [Libbitcoin] Adding sign byte b…
