201209231449 10cocl

explained decrypted filler

3DES(name+title) ECB, 57 GUIDs, seed 58

Metadata

Post ID: 10cocl
Title: 201209231449 → 2012-09-23 14:49 on A858's clock
Posted (UTC): 2012-09-23 18:49:20
Timezone: UTC−4 · title 14:49 against posted 18:49 UTC
Author: [deleted]
Account: A858DE45F56D9BC9 main account
Subreddit: r/A858DE45F56D9BC9 the main subreddit
Category: F3 filler: 3DES(name/title) → GUID list, seed known
Size: 3,664 hex characters · 1,832 bytes
Cipher: 3DES-EDE2 (two-key Triple DES), ECB, PKCS7
Key: MD5(A858DE45F56D9BC9201209231449) = f8ccd3cb681718ce9e5fe1f8345e5945 (name+title)
New here: Missing from the community archive; decrypted here for the first time. (new results)
GUIDs: 57
Filler GUID seed: new Random(58).Next(9) ✓ verified
Run: Run 34 (seed 83,105,000) (seed)
Draw: 126 · predicted N = 57 ✓
Machine boot: 2012-09-22 10:23–10:24 (seed = uptime at app start)
Sources: arctic-shift · body from arctic-shift
Links: Reddit · Arctic Shift · JSON
Score · comments: 1 · 0
Tags: automated (decryptable)2012Encrypted masked GUID listarctic-onlykey: name+titlerun: seed

From the post to its content

As posted (encrypted)

1B151B58139CD8C7 1D8A84F0F5F2626D E9DF4062E5509300 4D46FAB94439EF1D A81E87B70BEDC7B8 54FA83C62D0DCD86 55E6422B4BFAA0DA 9033154096202E0C D2B49231B5B7B584 E7594A69260BD25B 71B42E2185D802AC 48717FACB67830C9 0ADBBCB2E8907010 A3702353D7873260 57BFAE07BC359420 62B90DE6FB7F35BF 56CC529C5A3DCF31 BEB5533BD4FEC155 1AA602F852A7A691 55AABDA7BAB21B39 D3DD1840CAE7A91E 0B5A5DE9F6B479EF CFE8A58D126CCA68 F32FB5C2E49D1F00 1B674813A354E4A5 342EAA0201BAE518 D85AD76D736CBB33 5EA7A1A519BDE475 C6F078097D5000EA E0787AB3706438F8 E8DCDB842F951C33 5D06A45EC0408351 8284D20136233B90 1F3B807E5A912DC3 49BA9AB8369D77BE A1B1D90C25E29E5B 03DEBD92A50EBB37 91FCC886A2B3A8C1 E35DA2CC5AAA9C50 022636AA085A566A 057317C563C509E0 8663BFBFDD201D2E A1E5204F411731E8 EAAFF9CA4EA1903A F69A9C5A707DD881 3C6BAF8A14267D17 36D25C8574775EA6 C6EF280BBAC81AB7 0C46300F9CB7E318 2CC43F163084A684 C295052C52617DFA 5425022ED90FEF0D 9854F65624838A60 8426FE92CE72BB10 DD03F1CDF9AAC753 E6D06BB0EF86438A CA9B9B1FA10A7EF2 72B40A11D59E1429 FC1BAC52E9725410 D466A7DA25065B81 89569B21BC95DD3F 2FCD3CDF8819710A 30D842B33C58D1FE 7FCF0F20E4AEC36D 4FCCCB833D7995FF 9CF437FC364669CC 69C9CF289C89E8C3 D103C938DAC5E4E3 BE30D203596C7B07 7E517F865EE67405 89C481479AA0647C 1808585D652FBC48 BDE440A681B4B142 675BFE102F48AC29 BAC2AF41582BC46B 2015F219F037C733 E595098D7FCB10BB 30B7D396FB89A28E D8D40F826EFBB828 1C0B4650EF59288E FBF07DD1293230AD 3FCE466838E98FEA 8BF24474AC014999 C0A47A9750B12730 E98588C3AA126C0D 01A47C5648B5CD60 093F1013A79DCD1C 7E38C9C37C7B3AB7 B656873B301D60A4 7245D2C378A1D4F2 6B42FDFE1B092344 15AE8E717B1062CC CA03D46C9B60BDF0 7C5A095C47EB38BF AE49D1CF5A8B830E B753AC9A1C68CACB 9A832A6C45A3CCB5 15F72A4CA4DE5F89 CC5532E6999466FA C62D9AAC44057F2D 843ED225B232B07A 05D8FE2A744D1F16 4F1A224EE8A6305E A0F2E4E0C3AB6F64 A8D5D6425FC286E7 19EED858B25EC230 C784CA39DD329E2E C3A67D442E0626EC 2170A5CCA62CDBE6 11F59A2CC41CD8AD 27FCF97FB41CFD72 F53DD37E0FE70977 F9FAE18F8A39653D C569406B35FB594B 03899B177D35088F 46FD1DDAA05BC26F 23A5FD622503157D 99D2AB2236346B87 22A1C01E5CB579C0 2B9BE0DBB0725042 8A44BD0DB3FA3A1A 5372505804BD47A3 511661E125142B20 4EFAF699F3315028 D8EACBA307ADD9EB 49F2C2E7CF75CEE7 0AA3A1AC867D807C B31125ADD2A9F9F4 2B82E46A93F603A2 DA7D099C9F21C6AE A0ECE40307099313 40950B62215C9020 180AED07369C03C9 4A7151C67B16B07C B2076F37EBF97279 6604CA0D4675B754 1C46538ECB79A1CC A7B13F6094949D1A 386842A45549A088 32AECBA33DAD0AB6 B36C6990EBFB5A5C 3784F027E3474E3A EF79B8321374DB70 2C10F3C8EE89561F 862DD6EE0F27F6DF AFF078D63A754376 0BECF4505F6EDC71 39DF01126FDF5F9E 0B9C20F188B632AA 4F55AF8926C7ADC8 4B678F7C4A8AE27A F1EFFBEC9A832AF2 391D4EB56715AF82 35F41A216348F235 6FA6B28213A16614 B021560182701071 31B160B54449DDC8 65DDF5C879F3BFBC A52157C68FDCD4CD F829306FD0EE8824 4ED34DB8FE746639 5766C10C31BB13E5 7890787481036563 69BB2D9528E810BA 0F839C72A89FD3EA 25F3C254A1BDA0A7 B45796EF22E982F6 775B47DBDB9F5DF1 E0552EC56ACC5CC5 B078FCA3EF5FC52D 27BBB46E8B2A8344 603C217FF4658914 24CA1E997843F7D6 933DAD6D64C5DC1E 4040C1FA94F8C598 57A44A46FB0114E8 CB5E2A34D29139EC 2AF67B985A12F2B5 C96EC5F18F556719 27D0237534B879EE 5157D3BAFAF60BAD 37D7DF5AA38C3966 FB7531947847F0EE AE2A1E9595C227FE BCFFA97587AC939A FDBAA7FC361A755A 8175AF289B32043C 7B59F73F6AB6CD7E C28E21AF9B3D7034 2AF7F4A05319AF2F 6F16804A913A988D 56BF7D569F05F5C2 E3E08BE213A19792 19EEF7B129EAD124 813F3F2BBF7960CD 7F9665BA3BA02C92 F253C707F56B4886 378B9741F844BD99 8E2A7BCDFF0496CC ED4444E83C439512 8933A338129E7293 78875C4899C55830 F00F19E5E887FFB8 DF6B50C03A4F8B4C A0669A2D6A5216D1 A530D42CE1E3B3D4 D514EF69B1D1062F 337C61D1BE937827 000E23B2A94B924A 282424A4F2916DBC 885C3C034EB0E6F3 C15CE12546BAFCBB 4E708CAD1E1B0A8B 6CDDCC5525F5FB5D FF76673E5751D8D7 25440C64FDF135A5 7534DC9BA926E23E 8656B2FE8B809A64 5A52FD0CA8254773 6AC933970F17A7BD 2EF845DC07A2D434 EE92992D78456A94 A50AD85F5198A37C 3149C14B1B5260A3 53C92CC9664A978E 8239A0C4BD340D08 999A578CB5BB4E60 1B5B3D0A8AE25070 031CFD36ED337800

Read the ciphertext. Strip whitespace: 3,664 hex characters = 1,832 bytes = 229 8-byte 3DES blocks.
Derive the key. Password = A858DE45F56D9BC9201209231449 (name+title). Key = MD5(password) = f8ccd3cb681718ce9e5fe1f8345e5945, used as a two-key 3DES key.
Decrypt. 3DES-EDE2 in ECB mode, then strip the PKCS7 padding. The plaintext is 57 GUIDs as hex (shown below).

Decrypted: GUID list

  1 21cb51a6-1518-029b-baec-000bd2cf23fe
  2 6ee6523e-fc51-7062-9abd-9e67a726c013
  3 865ca943-1a72-2a4a-a7b3-2f1f43dde36b
  4 53d284a9-965c-8984-91b7-5b8be9356820
  5 5ec918a4-a2b2-3b58-a80d-4c98f860840a
  6 72075500-df50-2a73-bd3e-efab20791dca
  7 fb7880d9-3a8d-872c-8759-e1361cbf0131
  8 e07550ab-914e-4abb-8bca-280bdcdca252
  9 b77b3b5c-23ad-158d-8a4e-6c5046bcab51
 10 b2d00f5f-a70e-5754-aa8e-07597ac664c0
 11 7bf0936f-7276-0216-8cf5-8be7c21f3fd1
 12 0dbc4ff5-58ea-62aa-a415-eedb5d5a5fb7
 13 a1f23ad2-92ba-4cbe-8706-22b497e44d16
 14 3db12c30-bc58-52a2-accf-ae68ab1a40f2
 15 a42778e3-1662-56d0-9e15-a9bd449e27e9
 16 312e6647-637b-2843-ac7a-eba9ca97ba65
 17 9aba4259-8374-2a89-a070-6794dc514ab5
 18 57911e51-04eb-8595-b816-fd93826013a7
 19 c4d06a57-b23e-2e52-b859-9827d97b8c25
 20 2e4e1d9c-32ed-6ee8-9d8e-926e88bdcb66
 21 cc2dfdec-f377-4819-94b5-20c71d00feb0
 22 b06026a3-55d3-050c-a150-b0349401bb7d
 23 52fdef72-68c6-7d89-958c-ff288aaaae8e
 24 fb0c36ac-58fb-2a36-a959-f10b1f25f2a6
 25 f1bda519-2332-3b14-a488-2242d00f5885
 26 cdcc0763-c5ee-7cad-90b9-622d0d8ea3c6
 27 eec872c3-cc67-7784-a607-fa2720c4bd05
 28 40e37484-0df5-58d8-965f-7e6a298421bb
 29 b84f3929-2218-548b-9df0-9501f0cb9073
 30 154902d2-c8a2-7de9-a372-4f4435f65cd2
 31 60ca3abb-131e-5905-b91f-3cc99415605b
 32 2e98cb61-1ab4-6a31-9bd2-9be585762487
 33 29ff62a0-9a1a-50cb-b1df-80b62e3333dd
 34 742070a4-5126-3506-85a1-00304172f2c5
 35 7fafb99e-b803-8726-a7ea-4b5d40d2d647
 36 a102e34a-0b5a-23a9-abd8-c9aa3f4f9c32
 37 e91885fa-742c-097e-82db-4f38fa1b4be8
 38 8e18260f-d923-8459-9657-7d309545229d
 39 9a7b82a8-03bf-26fb-b7e1-5c3566d63196
 40 4c27a173-3aa6-8453-9cf3-9a29a2a9f129
 41 47da0307-da3a-01d6-bb05-974101a59d03
 42 9e0bcdb4-bd38-7dfb-ba81-ac6c9f09a14b
 43 97253e02-faf0-20f3-806f-f8239749640b
 44 ef089b30-f62d-7cc1-923d-3f6065355f71
 45 65b4c258-a18a-4e69-89bf-fd3d154527bf
 46 3b8ea1e9-c724-7fe7-a8a1-173d14589dac
 47 fb29ff95-f99a-0cc8-a61d-7a7fc2e0f9dc
 48 8edac881-e9ec-3879-91fc-a4bccbd7f792
 49 a0d827ca-66cc-765e-8524-c5c4314e8fd3
 50 2cc2a4f6-7507-7b37-a8d4-35a5b134c853
 51 a2189391-9272-17de-ba17-8a24af814a5c
 52 f91da85e-1f82-7ac0-bf27-a363c169ca1e
 53 e6651c6c-ce7e-64ee-b1c1-30e217ec29f1
 54 932dca1b-c130-298f-b642-4dcb70bd9f51
 55 f3d07307-d3ca-7d5d-bbdb-a38361d8d19f
 56 cfc3a339-68b4-8a12-be38-e3e5b3eabaef
 57 738e251f-720e-034b-8ac6-e5521e5733e1

Explanation

Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 072832841506455228264072377557565382082807274703771762780. Exactly this sequence comes out of new Random(58).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 126 of Run 34 (seed 83,105,000): new Random(83105000), Next(8,64) per post. The RNG predicts N = 57; the post has N = 57 ✓. The seed is the machine's uptime in ms when the app started (boot 2012-09-22 10:23–10:24).
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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