Hey! I'm David, a security engineer at the Blockchain team of Facebook, previously a security consultant for the Cryptography Services of NCC Group. I'm also the author of the Real World Cryptography book. This is my blog about cryptography and security and other related topics that I find interesting.

# Sheep Market Place creator revealed? posted December 2013

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On 2 November 2013, I was contacted on IRC by a pseudonymous chatter, "an anonymous security hobbyist". He said he had some information for me if I would swear to keep it secret. I agreed as long as it didn't involve violence like hitmen. He had been impressed by [my bet against Sheep & BMR](http://www.reddit.com/r/SilkRoad/comments/1pko9y/the_bet_bmr_and_sheep_to_die_in_a_year/) and agreed with me that the official Sheep story about sheepmarketplace.com was too stupid for words, and wanted to share the info with me. He then told me he had just finished researching Sheep Marketplace and was highly confident that the operator was a Czech programmer by the name of "Tomáš Ji?ikovský", and further, earlier that day he had mailed off his results to the FBI. (He also claimed credit for the BMR & PBF leaks.) After reading through his results, checking some of the links to see if they were as described, agreeing with him that Tomas matches the profile for the Sheep operator uncannily well, and reflecting how stupid I was to not look harder at sheepmarketplace.com because as soon as you see the forum posts where Tomas complains about the problems of running a Bitcoin-using hidden service it's completely obvious that Tomas=Sheep, I suggested he contact Tomas. He declined, saying he didn't want to spook Tomas (he is not a big fan of drugs), although he agreed I could release the results within 7 months. The most I managed to get out of him was permission to [post a cryptographic hash precommitment](http://www.reddit.com/r/SilkRoad/comments/1ptd6b/precommitment_proof_of_knowledge_about_a/): \$ echo 'Sheep Marketplace was founded and run by Tomáš Ji?ikovský (random nonce: 19093)' | sha512sum 43a4c3b7d0a0654e1919ad6e7cbfa6f8d41bcce8f1320fbe511b6d7c38609ce5a2d39328e02e9777b339152987ea02b3f8adb57d84377fa7ccb708658b7d2edc - I was as precise as I could be at the time; saying it was a precommitment to Tomas's identity would have clearly breached the agreement. Anyway, I took his notes, made copies of all the webpages linked in, and prepared a single compilation in MAFF format: https://dl.dropboxusercontent.com/u/182368464/2013-11-03-sheepmarketplace-doxxing.maff The basic overview of the findings: 1. Tomas owns the hosting service for the sheepmarketplace.com VPS server. There were very few domains hosted there as well, and he controlled several of them. 2. The site itself seemed to be very closely connected to SMP, using the same basic technologies and possibly a non-public API 3. The official excuse does not wash as sheepmarketplace.com was set up not long after SMP itself 4. Tomas is the earliest known promoter of SMP (1 February 2013), and recommened SMP & BMR over Silk Road (11 April 2013) 5. Tomas is a C++ QT Nette Framework Czech developer who runs Ubuntu, exactly like the SMP developer 6. Tomas has complained about the memory demand of bitcoind on a VPS server, and discussed the difficulties of functionality like email from hidden services 7. Tomas or his girlfriend are active users of Tor, as evidenced by screenshots of their computer 8. it's not clear what Tomas's current job is 9. but it is clear that as of October, he was working on an e-commerce site which was having problems with buggy accounting of deposits 10. Tomas posted a .htaccess file which has the same (buggy) functionality as that of SMP 11. He is an accused Bitcoin scammer A few of these could be explained as coincidence. But all of them? At this point, I would rate Tomas as >75% likely to be involved with SMP in some fashion. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.15 (GNU/Linux) iEYEAREKAAYFAlKaXN8ACgkQvpDo5Pfl1oJ+HwCgnQmvBZFTHkzDEHzayEmrTnjB d+oAnjK0a0UFDwg+wAvkDxsjer6w8rXl =tYBY -----END PGP SIGNATURE-----/