201302270420 19bi2i

explained decrypted filler

seed 406

Metadata

Post ID: 19bi2i
Title: 201302270420 → 2013-02-27 04:20 on A858's clock
Posted (UTC): 2013-02-27 09:20:57
Timezone: UTC−5 · title 04:20 against posted 09:20 UTC
Author: [deleted]
Account: A858DE45F56D9BC9 main account
Subreddit: r/A858DE45F56D9BC9 the main subreddit
Category: F3 filler: 3DES(name/title) → GUID list, seed known
Size: 3,856 hex characters · 1,928 bytes
Cipher: 3DES-EDE2 (two-key Triple DES), ECB, PKCS7
Key: MD5(A858DE45F56D9BC9201302270420) = a865d89476252e565a977583fddaa846 (name+title)
GUIDs: 60
Filler GUID seed: new Random(406).Next(9) ✓ verified
Run: Run 42 (seed 983,934,859) (seed)
Draw: 56 · predicted N = 60 ✓
Machine boot: 2013-02-13 10:26–11:32 (seed = uptime at app start)
Sources: community-archive, arctic-shift · body from community-archive
Links: Reddit · Arctic Shift · JSON
Score · comments: 6 · 0
Tags: automated (decryptable)2013Encrypted masked GUID listkey: name+titlerun: seed

From the post to its content

As posted (encrypted)

35B9B9E186B197BE 106AF9B4FDB1DF61 47BDC79F34BE3759 F679275549103BFD 6D44020B21AD273F 44BF8FBA0CB9B1D9 B42E52BCC26C04FA B857C2FAF9DA2671 4F6A4FC793C6F7D7 B71C1C8409D12B7F 65B58D5F2076166D 75CA5E9B3E38A3F8 D9263E36B3DAD8C9 16E9B16B72AAD31A 4B4D229A45651FD9 A1CAD7BDCCE58A0A 54E4F8390DA7820D F75B42A560610108 2F01496C508E4F9A 2E8EEEEBF3457719 1CDBEA0D8141DE52 A82B52BA8B42A026 9BE220759B75754E 3F4112F7B7515A15 69FB5E94DED426AD BBCE4C65A0E972E3 A0821AEC2CA43E72 B083A5324A78BC05 7525A56BD1D182FE 655155162C6BC7FD 1E3B0742AAC84090 E3F0D9509BEE47E9 E3654850E80A56EB 313270349A3E3F2D 3628AC768188D73C 4600EBEC16E6DB3B 53C4B54A5ED0CE64 945394536E0681AE D0BD8207966CD3EB 3E791D191F1B6337 B1D0C1EE4B71BFA3 293ACD6C94794F90 12120C7500CC0127 7291C85FAAE5BD5B BAD391673C4EFE49 D826A81CEFD1F6CB 9A4BD155F718CC29 5631C40E91B22627 7422922F8B9E56F1 B927DBF09C0A131E 439D186F7874CB34 94FB0BCE39D5F19C 2D2BAAFCBDC65C4F E914F9075E0A6112 2E5AB24A22639463 EE593553A62CF574 753C6D3CB3B4A42D 0A0C233CBDF00744 B030666DCD3307BA DB7868627CA5FAD6 033D6A1D0702A89F C7BB26243D1280E8 1CBBEF2C570D975E 598DE0328F55C39D 5162398F7979DF02 B77B80C40921E240 817B47AD89E1D177 B703BD7C4DB3C45F 047F67C5F353D702 C48F5FA8DF4DB0EB 8B90ADAC47E0148E 48DFE279A1C38642 C1AD22ABFB3CDA1B 75FE18ECEB04249D 735799D02CFD6EA4 E7F4B0FB82938966 ACC9C5453F995A48 AB32393677386660 C8C2B79332D07C48 C2F6099B80943B44 05168FF886227397 4EA5BAD4A2BA0C8E 71D55740EFF3FA49 25CF37B7ADA1EB06 30748A74F9FEFCDC 2A2371B442F32FA3 C9258BE39F850CBB 70FE38401EE15196 6FDE41CCA3489A4F 3D4831BD9658A4BD EEB92BCED6DBE819 8E7B44FD665652CE 2ABD8DA98868FCDB 5682508D1BB05A17 35E8616D1462690B 12B81D5E8FE1A619 E3779E1A56B537A1 6CA435974E7555EF 67D8EA98672518E2 10C44B54B625345C D4C1C1D5CC2C9AB1 DC6C6CC2EAEAD6D1 57111C953E01677F 9EA4BC6FDB877950 7FF167D495F5D9AD 1FCC5397E79D2FB1 B7F96A99A7B70C5C 86E854FD95D85E99 CFE74A57860D797D F0BA86EBE7D915A2 B2D54ADE9AD511C3 3225C0F69A96A92E B1B609FB84CFDEE6 01D8FB8CBCCD4E90 4B47073E66FCBE40 856102E4F8323DC4 61DC5A4BF6D202E0 ED9849CEAB73F742 20FD168142A8DB4D A51E18AF044891BF BD1EA70FB46B5D0A 7356B2A262891537 804B589FD410A21F 616518E5C772F8BD E73AE427F75C66D9 829ECEEEDFA1E8D3 4A05344A2CBAA226 917C80237687DDD6 2EAB0D5438089188 FA0052623ACF9115 EBE4253D43519E95 ABDF05CF840F0BB1 85AC18A4BB64740A 19A865F4E01C48A1 A8E6F6258061F876 E3C526926C1C755B 13B98A1DC5118F92 5F7DDAFEA6B6605A F6823864949F3E3B 9CF00E02305F6D93 87A44FB644209293 263F785954EB261E 885C4E3C03589218 E86A0EE22B7FBB3C C45957BC00B2F32F 531C5581A76DE136 405E3D6D676E0126 6D11E3432C69213D BE443DF85B994475 CCB5C5A1A955B0B8 4B9167C883557D16 A6D5CFB661A298B3 9FB11CF5463AF80C DB5EF8C4D26DDDE5 A23FA8725333874E 21CC24C798DF8A67 9D67F60CB4D06FC7 B88D9238633DBB35 046395BD08C609D9 4DDA28621C9137D9 72FE03440F97A873 8AAC29C8A9A54C03 55154A973A76EBAF 26D70F2C5E0AA033 28F771ACA03F73D7 B3F10EACB43FCEE2 B6D8EF5429D9C04B F743DE8D36E62FC5 293E1C38E102B8B3 CB53055C8BD14C4C 83D0AE34B72A39A3 206B6B395FA18F50 60FDA0004524AA5F 22CE2F7E6DA0572C EF6ECD44A2E82905 9F2EAFDE1918817F 402AB10C7761F054 2BB2BC98095F3862 6654B22BBF9A1F89 AC84A8C00AA29611 6BC692FFAFDD9331 8A2BB97E24FB9A48 42426472F3449FB8 9B985CF37A3CA971 5F7DFDB446FE2961 269EAD7F623DEE6C 15B9CF9BB525F157 F13B086A8CB15F73 6565108CEAA9CC2F 71D449B5DC5BA0E5 3C8D48C7953F5C65 1112963B2BE303DD ECF3FBC5FFDFAE2D 9F8D480C3A811A53 DFE0A7EDCED9F47B D5EA2E74CF37C187 3E69EFC1A39BF9B2 87F6A77417B23EB9 DE4211285E40CA2C EC3AF11291FCD576 C257A774B4981AC6 33E76D11C0D501AD B5BE6323286F3102 F4F6ABA81AA7B090 E79F55820F8304B6 E5D5A457F43B17A5 BFA9E91FD44875FA 8102DE7970252A9F A8FFE459D89509A6 436572D6154F3AAF 1BAD7A914A082B63 80082F8131EE7CAE A08E867CFCF92650 003298E56F4DFE04 F1643F3E64FAE518 2CB78F526BFA9716 46CF7D1EEB1E37D1 E6CEBB12D0F45C2E 9B4DD39640F1F8EE 7D8FF49B1EF30112 0354E8A68B91F48D CFEE72632EB29E2A F310B7C3BD9ECF53 6C1492473253C300 9784A27B9C8C2946 942A15CDA4D201F2 F0180C2BB9BA7DDE 69196F3481813F7E DB0A04529318B7DE BB303E8A7AF62566 79CB5379EF528F4E BB44783B11E275D6 13A10E49D3164BE6 3A5E2DF6B83C5F2B 6415D329D06C1EEB D868BE1C8C73CBE0 6A67D6200B26FC69 31C89275EA726653 90C89756593C1876 FA581DAB94057E0A 050DC975CEB1DB3C

Read the ciphertext. Strip whitespace: 3,856 hex characters = 1,928 bytes = 241 8-byte 3DES blocks.
Derive the key. Password = A858DE45F56D9BC9201302270420 (name+title). Key = MD5(password) = a865d89476252e565a977583fddaa846, used as a two-key 3DES key.
Decrypt. 3DES-EDE2 in ECB mode, then strip the PKCS7 padding. The plaintext is 60 GUIDs as hex (shown below).

Decrypted: GUID list

  1 52e4feec-0dda-7ed5-a40e-82cf153124ee
  2 0a989c81-618d-8f6a-9b78-8944ac8c9e24
  3 7ef300ad-2494-5f09-bb4c-a09861872734
  4 299a9f24-67e1-13bc-abe6-f5ed87e53fe5
  5 d219df24-535e-4b3a-8254-df241998d853
  6 30cbb3d4-7a2e-3ff1-8abe-588b172bea58
  7 5deea092-cb03-7986-a7b3-35eb877f8f3f
  8 1c1c94ff-1535-1e90-b96c-e1ebfcac9e3a
  9 056d4cce-96ed-1ebb-9526-46e5db532b91
 10 20499dff-cd36-8fa0-a83a-008fad5ee76d
 11 67424816-c16b-3f75-866b-57407aca737a
 12 4a159e70-a0c9-34c0-9cc2-cf2593d2e03b
 13 43430189-df58-6fd3-ac0f-0a26967bb14a
 14 221a7534-c307-6256-ad2d-145da362dd81
 15 4c4cfd42-95b7-19f3-bd03-1f0a85d51987
 16 ce616035-f263-582f-92eb-6d2801b42be6
 17 71c5d156-0187-4f79-97ba-7bd2e182b746
 18 8e4a2f6e-6cad-6be6-b9a2-8c08618ca19e
 19 2770f43a-da3c-65ed-b9ee-d43e4a536b38
 20 54590183-2d52-45d0-bec9-ffdd8fa3e96f
 21 e5e2e4a2-67b0-60f2-a452-795ea9ace63d
 22 20c8a5de-505b-4627-9e6a-6f972ef4ac02
 23 06d3c2bc-c3b2-5dc5-86ba-12ce6c7c996f
 24 b315a91d-d26a-7045-a40f-b69656635f45
 25 ec614af4-2217-4637-ad52-8447f1629a6f
 26 114b4cfd-8db4-5fd8-81a6-9d44d9e2d965
 27 5eed6542-42c8-846f-8c5e-0529b1204d20
 28 867ee08f-661a-2f58-8f0b-8a440d225e35
 29 438dd45b-1c3a-6850-9838-7bebac1c03a7
 30 779392f3-0f37-03a6-8209-df051bed7cf0
 31 80011586-6600-08b0-a3ea-228ac03ceafb
 32 5fd771da-6274-38be-939d-a10cadbe3048
 33 e1e41ff8-5cb9-54c1-83b2-21e83e066c75
 34 9528f766-d1f2-18dd-a306-2cf988677ff7
 35 a16cda05-af15-3621-a3f3-43ade2fc46e2
 36 d804fd8c-854d-3b71-95f3-e0cffa0e23f5
 37 83411ccf-b84c-3ed6-8bc4-ba74abe642d3
 38 376e08dd-a2f1-0492-90c2-a61be5fb08ac
 39 f63da06c-c725-7276-9075-ff5413161951
 40 37bb14d8-4986-4311-9a15-5742fbd5775e
 41 faedb357-fb21-1089-9c20-6050ef58d4bb
 42 8923619e-e8ac-49ac-b3cb-152b5819b834
 43 e4723e3a-2405-301a-9e42-99b226d1f444
 44 7682b0b2-7796-1ed9-9eb5-22ce1caf6b79
 45 c61a8d49-166c-8155-b59d-28b088c760d5
 46 832002db-0d9c-3451-b26a-d52e803dbc4b
 47 13c5c6c8-014d-4e65-8f6c-660212d4f752
 48 b355a3f9-ba8d-78cb-98ae-1cf21c5105a7
 49 bb0ebfd8-61d6-752c-ac27-9dd72b0336a0
 50 38b4d623-816e-71d3-8da2-45c779cd3e1c
 51 08aa109f-1373-5611-8323-179a76a7224b
 52 e6b2cb58-eb7e-68f3-b1c3-684d2752d827
 53 15d6a280-a163-6f26-8d62-4da4bfceb58a
 54 0b56b576-97a9-1b51-867b-4de4b1e9a618
 55 df0a0d21-ea43-4e99-a6a5-7b130d6d2327
 56 c0ed6935-e92e-30de-af9f-ed8a00d88807
 57 6f4cc58b-911d-304a-884c-4c3c5507a8b7
 58 19be8130-9f05-6790-8de0-7fa70e073a5e
 59 467139d3-9dc9-6a12-84e1-7e3790ade5e4
 60 e183b70d-2fbb-7eb7-9d86-f0dff7f95fe9

Explanation

Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 785143711833661546646457458260035133307414318347775661433667. Exactly this sequence comes out of new Random(406).Next(9): the per-post millisecond seed of the mask generator. The other 30 hex digits of each GUID are Guid.NewGuid() output and carry no message.
Explain the count. This post is draw 56 of Run 42 (seed 983,934,859): new Random(983934859), 4·Next(8,16) per post. The RNG predicts N = 60; the post has N = 60 ✓. The seed is the machine's uptime in ms when the app started (boot 2013-02-13 10:26–11:32).
Conclusion. Filler. The content is fully explained by the two RNGs.

Metadata

From the post to its content

As posted (encrypted)

Decrypted: GUID list

Explanation

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