201308271129 1l69lx

explained decrypted filler

seed 137

Metadata

Post ID: 1l69lx
Title: 201308271129 → 2013-08-27 11:29 on A858's clock
Posted (UTC): 2013-08-27 06:59:54
Timezone: UTC+4:30 · title 11:29 against posted 06:59 UTC
Author: [deleted]
Account: A858DE45F56D9BC9 main account
Subreddit: r/A858DE45F56D9BC9 the main subreddit
Category: F3 filler: 3DES(name/title) → GUID list, seed known
Size: 2,832 hex characters · 1,416 bytes
Cipher: 3DES-EDE2 (two-key Triple DES), ECB, PKCS7
Key: MD5(A858DE45F56D9BC9201308271129) = 542a2f5c6b88f427ddfddc57c36547cc (name+title)
GUIDs: 44
Filler GUID seed: new Random(137).Next(9) ✓ verified
Run: Run 51 (seed 714,271,718) (seed)
Draw: 11 · predicted N = 44 ✓
Machine boot: 2013-08-13 23:35–10:35 (seed = uptime at app start)
Sources: community-archive, arctic-shift · body from community-archive
Links: Reddit · Arctic Shift · JSON
Score · comments: 3 · 0
Tags: automated (decryptable)2013Encrypted masked GUID listkey: name+titlerun: seed

From the post to its content

As posted (encrypted)

E6A9F45A8F4DD0F7 A374CAC784DDB66B 602175076D3D26CC F12AF874E6CD3608 8D8BC775758BED29 60FBCF56A6BAADC8 CD7493580C0AB1E7 172ACAEA32CE4B16 E5EDCFF4B1C35852 CD4366A04E7BF112 0681D0558643A4B3 61B999A48089FDBF 35DCCFC2A2B6126A 023E6926E0919304 7A1426747892C127 0AE249C14B4A5858 A06DAB52680147CE CDF080CE50645225 FFB21950EA7C4154 F93F999D24722FCE 6FD4B63F591B8B52 0CBB5844EC1C31F6 27069CBD3A6A228F 9FDBBD369CC1D505 B7D98AFAE22B0696 73C212CDCEF7F444 91C09979DF842829 15A7476CC977BBF3 A836286C80B35C95 4F9DEAC390A27C18 61B9FFF6DBD61786 2136CBDABD4823E4 E4A5E2ED49BA5F4E 58FCE47121F8E531 0B8BEB0CC424A633 E858845663B080CC DBEB74E6D5AD40ED 32ADA0FCA47761FA D36A436BDD7933CE 0304FAF4187CA306 26CDE26A9F6527DF 6BE997469F90FC44 001A9AD36387E099 618B51F9DFD4A9E1 D5E33F9361BCF110 5A5666FDAB9325F3 63716E1C49ACEF14 6069286EDDD05227 932937B8FECFCCD2 E6EAA481B84AFD84 6F052A1F04F2FF31 86F00EC9ED8B5229 37011DE929260786 C02C9491ED2B41CD A49F8B055C359BF6 55E9921817A97F58 B0D0680C4BBA3AD8 DF5057EBEC881A80 1284EFFDDFA805AB 96E7C60A18413FB6 6BBB43B5959E359E 76A492F4E43F4B8F B3D22C22A72DCA6E 2C7DCA150BBDD0DC 7B49A4BA921260F0 43DA276ED58CF8E5 E9EFA83D83A795E3 EBFBF3E654913D0F 553E5C57A6A3AA9F BA922C06D4E89432 85DFFCC657935088 C4D6D447D84245D5 17C5D22263666F18 B19B48388D73DFA1 58C1FFE29BDD0B5B BEC07D0B16CD0F46 DC9D79F8B48FAE67 EE3E79B4134DF774 EB5AA930F8DD3959 CCF785B3B66313C6 F7C581C1F4A31263 8FB787400379D0E9 B681247BC3E40F0E 1D036B7A0CCA2E07 CD844D127EEE3C14 6CB6D391505FEC51 DF92C47BAD11BE2F 7DDF3E00A535ED29 1524FB10D33F73AC B06185F1AC5B1C36 369CACFA8E5D6242 87C7E20BC26870A1 C8B62BD602677547 F2EA4DD9C6266B84 B8E854E980A5B6D2 F8E623B2C42C251A 7CD42235528FB081 DDC78C72FE750FF2 9FBD61FD7F0B8713 226BAE04AE26EBA4 FF648C3DFE1FEA5B B91AEF3202D208F8 568EB84246CAECBF A9CC3A607720986E F57881E2B9B13B87 6DA6D5A31C970126 36468C6C20510C6B 0471AEF0269DBAD4 E837CF1C06D39B6C A4A89EBB7CEA5891 5E12CE3A58E0662F 16C3668568324F96 41198D4E19B50838 E882CA0516546A76 1AC281DE6B8CE205 ED2D3CFE0B896E22 38B811EE7F2243F8 5F5EB42ADF28468D A6B142B5FDAD6032 3AF135F339B71B44 61E24B30307D0A32 27B1E825C5C4DC6E B53D7592D23946AB 56CE55E6D7150550 8516B4CACCA7AF30 8B13E898A4427F5C D45B874104F69F9E 1708CFE819F66669 84C17F7B9B94A452 ED8B3337C555192D A6A8857BC41EB34B 875981291F04802E 4D103B9936CE67D7 2AA89FCD8FB7E8CF 548BCDF36E9EF597 D49E480BB0F17FE1 4A30327020127EDE 7E7EF990CD68348F F0E0AC19A9DCEF6F 7308049A6AD876BB 6B73F645122A8308 746F044B8A494863 7F4BF26ECA591173 95B674844ED8ACF7 50A1DA1FCAC12BB9 C49C75F26CE74079 892C4341DCE333AB 2B98F38D3B794F32 799F4EB5CD17593B C6416B9A40F3BDA4 545DA476020CF2EE 9AC0FFB86DAB927B 8FA72DE38CDE97D1 3129E487F651F154 A10194192C9D8B5D C38742DECC11FEEE 3A14DF6D7CD9CDA6 412398417F9D79EA 765676A1DB31FDB1 06F982AC3356C69A 1F8E5295DC583873 B7329C938955524C 0908F9A800FEC096 638F80BD6FDC3D02 7781040E3EFD5CDC 94F25A77D5B42C23 55667904834612DA ABB48C770D515342 3DEADF01B8892A66 348ED9AD732265D4 B52832C2D09F659D E5791AF83D55826D E57D57D866EF9929 E349B3861028BAF8 57141766985E5A32 193F5143145CB6E5 C2DD74B81D66B274

Read the ciphertext. Strip whitespace: 2,832 hex characters = 1,416 bytes = 177 8-byte 3DES blocks.
Derive the key. Password = A858DE45F56D9BC9201308271129 (name+title). Key = MD5(password) = 542a2f5c6b88f427ddfddc57c36547cc, used as a two-key 3DES key.
Decrypt. 3DES-EDE2 in ECB mode, then strip the PKCS7 padding. The plaintext is 44 GUIDs as hex (shown below).

Decrypted: GUID list

  1 af5830a2-5ad4-2f96-8fd4-73e31aa8179f
  2 f4340eb4-8777-02ca-9dda-5111ec750761
  3 345dfdb4-5464-4778-a218-20c37d094a1a
  4 1650a929-6bb9-741e-91bd-f10e4c6f0a87
  5 3af73706-0187-0590-83e9-1706ebe7317e
  6 ad86d37c-e84e-2590-b651-d8809bba40fa
  7 0bfd67c0-a745-20f2-9cd3-d32bb4b5f4ac
  8 722879ef-488e-1232-8a61-fa684325effa
  9 8dbd4d0c-c680-8726-83c1-281878fb01bb
 10 289bbdcf-bd0e-70f9-a5b5-d4f132b49ae3
 11 5d6ac2cd-897a-29e3-9025-2055fee93f1c
 12 26cf4f75-a536-374c-ac96-b50cacbed607
 13 65f3c676-ee2b-7172-b9da-5f613586ecf1
 14 0196999c-f77b-6387-8d82-75bf24735f57
 15 f5cfe63b-3a3b-7119-9204-ae9bc832264a
 16 f97af88f-1189-5c27-b961-4684fd2d04c6
 17 14a315ca-983e-441e-a274-15f729428c65
 18 bae4fc73-6c23-873a-b288-51d0802850ee
 19 9b3c7ee2-81c1-324b-b4e1-b9edd28449fc
 20 92c16c93-688e-33d3-9a0c-a051a3ea4f62
 21 91ae6dd9-7295-0c53-afc1-ad4b7d5245bb
 22 56e98c13-c71c-46ab-b8a2-53248df98f76
 23 77794f56-553f-14f8-b5fc-a3fc4cb21e08
 24 d16d6129-f895-84cc-96c2-0970053be5cc
 25 87517732-c862-1e3a-b3ee-8da21c2ce023
 26 062615c9-f9f7-50a9-aad2-8636886823ad
 27 c2cfa4fe-5db9-6917-a6e6-04db4f6d0d78
 28 1b16cd7c-84ec-5045-a47f-2de6b7e92c5e
 29 a1cbe533-c61a-390e-8fda-fe31a4695911
 30 fb86c01b-576a-3e72-8628-1dab273c3dff
 31 92546626-3758-6a92-b604-047365f86f4e
 32 dc9dab2f-f552-4b46-92fb-d07aa0e560a1
 33 8898b6db-b443-32f9-ad32-a325aa25b54d
 34 913d7dd7-59f4-3815-98aa-275a205cc866
 35 3065fcdc-5f82-4a67-a0db-fdb3a41097f1
 36 7f501da5-de20-6a33-9a91-4b5cb41fd5ff
 37 17c8407d-1c4b-494b-9cf7-4b94c116b379
 38 81dce77b-de61-6154-9394-c806f5cdac84
 39 702ac6e7-1c5d-7dc2-820c-58111c3f35ac
 40 ab113c94-3927-6747-9f2b-83a5d4b37f1f
 41 2d4eec73-ab1d-6365-a1ac-28edb36bc286
 42 d37d0477-2fcc-73a9-8237-0cebe34c0bf3
 43 49920426-324b-4121-8322-fefe63ff37eb
 44 94d619d6-f08f-6f3e-825f-5672eea9b08a

Explanation

Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 20470221872376754833041815653364334646766746. Exactly this sequence comes out of new Random(137).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 11 of Run 51 (seed 714,271,718): new Random(714271718), 4·Next(8,16) per post. The RNG predicts N = 44; the post has N = 44 ✓. The seed is the machine's uptime in ms when the app started (boot 2013-08-13 23:35–10:35).
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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