--- Day changed Fri May 03 2019
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11:30 < technonerd> the wallstreet market complaint says they were able to "de-mix" a "commercial" mixer but didnt name names for really anything as of yet
11:31 < gmaxwell> this wouldn't surprise me at all
11:33 < technonerd> through thorough analysis, the United States Postal Inspection Service was able to “de-mix” the flow of transactions
11:36 < belcher> i dont keep up with the centralized mixing world, but have they started warning users to avoid amount correlation yet? https://en.bitcoin.it/wiki/Privacy#Bad_privacy_example_-_Centralized_mixers_being_easily_unmixed_with_amount_correlation
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12:46 -!- stoner19_ is now known as stoner19     
13:04 < waxwing> be careful about this stuff though; a lot of the time when they talk about being successful in "blockchain analysis" they are often talking about using metadata. (that's not to say you can't get value in combining the two of course! a point which has been emphasised in many places, not limited to belcher 's privacy article)
13:53 < belcher> this guy on reddit mentions something https://old.reddit.com/r/Bitcoin/comments/biqd1i/coinjoins_as_a_percentage_of_all_bitcoin_payments/em59if3/
13:53 < belcher> "the biggest weakness of both JM and WW CJ is the change. it actually makes unravelling a whole JM series rather trivial." "Nothing published open source as of now, but there are various closed impls."
13:55 < belcher> it would be nice if he had more details, but i cant figure out what he means.. tumbler often creates changeless coinjoins and yieldgenerator uses seperate bip32 branches to stop change outputs linking with other outputs.. also some JM coinjoins cant be fully solved as they have equal-valued inputs
13:55 < belcher> maybe he just means someone using sendpayment.py over and over i.e. not tumbler/yieldgen
13:59 < belcher> iv asked him on reddit maybe he'll reply
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--- Log closed Fri May 03 15:07:46 2019
--- Log opened Fri May 03 15:07:55 2019
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15:19 < waxwing> yeah that hardly means it's trivial to link or something ... it just describes a strategy that can allow you to do a bit better than you might do otherwise.
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15:36  * midnightmagic shrugs
15:36 < midnightmagic> incomprehensible guy is still incomprehensible vague hand-wavey guy..
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17:12 < belcher> i replied
17:15 < belcher> he replied, so he's online
17:19 < belcher> it seems he thinks change outputs are sometimes combined with coinjoin outputs from the same tx, which never happens and is the main purpose of the separate mixdepths
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17:22 < waxwing> belcher, thanks. yeah, clueless.
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