Given a private viewkey/main wallet address - can i tell if a subadress came from that wallet?

yes, if you can guess the subaddress index

The main topic of the next MRL meeting on Wednesday will be the fee policy and dynamic block size:

Thanks Rucknium[m]1.

ArticMine[m]: monero-project/research-lab #70#issuecomment-1024964432

UkoeHB: do you think there is any chance that in the future 120 bit security will be deemed unsafe before 128 bit security?

like is that probability so close to 0 that it's not worth considering to you

or if anyone has an informed answer to that, would be interested to hear

is it irrational to build 128 bit security systems when we can in some cases build slightly more performant 120 bit systems instead

if the answer is nebulous, then better to err on the side of caution imo

Security levels are kind of 'ballpark'. I think 120 bits falls into the k=128 zone of influence... so to speak.

Aumasson also has an interesting paper discussing this I'm reading it now: eprint.iacr.org/2019/1492.pdf

I'm pretty convinced. vtnerd jtgrassie what do y'all think

convinced 120 bits is ok

My January dev report:

nothing there

Appears to be an empty thread for me

UkoeHB: tevador also brought up a good point that a hash function is still necessary to decouple view tags of outputs directed to the same wallet within the same transaction. that + veorq's last comment seem to leave us with cn_fast_hash, no?

<plowsof[m]> "Appears to be an empty thread..." <- Hmm. Perhaps it needs a moderator's tick. Let's wait and see then.

Thanks plowsof. That outta do it :)

jberman[m]: Ah yes, we need the output index. I am getting rid of that requirement in Seraphis.

gah, debate over. finally

woohoo :D

?

Siphash is also a hash function?

> In general you shouldn’t take the (encoded) point as a symmetric key

directly, as shared secret; it should be hashed to whatever key length you

need. I assumed the 128 bits were the hashed point.

veorq's last comment

Hello guys,... (full message at libera.ems.host/_matrix/media/r0/do…b9c58413f0049328262c035a4d1e5486bc2)