201209271300 10l7ov

explained decrypted filler

3DES(name+title) ECB, 55 GUIDs, seed 777

Metadata

Post ID: 10l7ov
Title: 201209271300 → 2012-09-27 13:00 on A858's clock
Posted (UTC): 2012-09-27 23:00:12
Timezone: UTC−10 · title 13:00 against posted 23:00 UTC
Author: [deleted]
Account: A858DE45F56D9BC9 main account
Subreddit: r/A858DE45F56D9BC9 the main subreddit
Category: F3 filler: 3DES(name/title) → GUID list, seed known
Size: 3,536 hex characters · 1,768 bytes
Cipher: 3DES-EDE2 (two-key Triple DES), ECB, PKCS7
Key: MD5(A858DE45F56D9BC9201209271300) = 69dc6cbe1e393858c4cce2eb19473148 (name+title)
New here: Missing from the community archive; decrypted here for the first time. (new results)
GUIDs: 55
Filler GUID seed: new Random(777).Next(9) ✓ verified
Run: Run 34 (seed 83,105,000) (seed)
Draw: 271 · predicted N = 55 ✓
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)

85F34C51CF8ED111 B6F80DC64E0E357C 9B55ABA550C9FE82 CFB3E2582B87EAC6 005F352BE3DDC2EB CA7BB3F13D97425F B53C77F813AA39E4 A6306E7197CDBAC5 5D962BE38E213C42 3B8A15A2256F421C 43D83492E02BDFD8 DDB7BA26CC6B5C05 3BF25B80EECD5640 A25F97FAB5D35380 D4BA9E89FDC3A781 9AD9BDD271288D0A 8BC54C7992DD2A5B 87AF54EA96EA5626 65D9A7A6B8980495 A38B44509131205D 9C61C0910F29ABF8 6E1E3DE74F1A815A 92624887E697563A 78B27888C2664E23 0656A2921C8FEDE8 3E832DD155D675F7 3E46DC76C8431AD0 F732FCC912B02F4A 9C3159549D1BEA73 77C38F4B29B28D7B 2D3D002C2E619EFC FAD8DE242B0E5603 E075595BAB57C5D2 1BC7E9EAADD1D410 CDB962D4D55D9BE8 29761F0E5CD7015A CBD42D7E8A479FD0 CE9F874BCB560305 F103AEDC1710B08A 9D3724453464C0A3 A729821274770E2B ED24ECAE42F2F1E1 CAC7CF2B08698564 38ECD15B840BADB0 76B5F8E578AEB869 203C07C4C373F558 8D3C614B02510D31 714B0494EE855F0F E024D5030F8F7947 C5EF54FF5DED0728 F9ADDB8DCE05CB52 31627A8FA7ED317A 2C6BB28266DD1EBA 873AD6FCEF8A44D4 033192B36C57A97E A99A0748328A28B1 0BB30742B4EF150D CF3D1ADC0BF24BD9 C0316A3004B53A6B 92C9181AEC0168E8 40CED18E85879306 BFABFADE998BA0F1 8795C945664AC3E4 814FA13A2F54D04C 777CA714354361F3 3C1B6A023885771D 0CFB0244F9C5F454 44D381CEC0D2F96E ABD750DE4AF8B35F C46081BBBD014A8E F2CD83C43F112FD9 DD7AFB70BAC4A6D6 762952B5E7F85E07 B8ABEE16ED7F158E E5E12806C2149EB3 81CD8C04B9F6DE28 775D7A06D645505A A22A388AEFFF89CB 75FD95017AA89069 62C60266D4E10A52 73023EC88C4951E9 E9D8FEF30D4A2782 882B329DD9C06778 855D26E491A9DDE8 6862636D31701992 B9DE8A27133D2D10 CA7E7DD8918CD39E 45419377C916E4F3 58C65E8CB131BD34 CBB9CF60952521D8 9978E200B1005AF0 6B6C9C72F30ADB14 194E49E184D5AF8F 3C9436B04A4A9A26 D6D19F495DABDF49 0CFB8BE3CA665FFA 88BD625732870F47 94F0CCFE9D58981D 0F7784BBAE907BE4 0EE5F14997F60A25 4C33A0C81CDC7566 85C9DC9A899B82B2 54C639BAC6C5A622 8055C37069C534B5 002DB9613F598591 B0739D9F7C5DF93B 6398351A5760BE24 8E3E9CD8803FAF9F EC9AAF315D4A8A17 168A851450F810F2 5996978E806430CF B4F7BA3AA7A48D1E 456F0C6FB0389EE6 D9A0CEC3316C52B0 49DDCEC98327E35A 28B63DFBE9091971 505B345F99E0262B 4760E8B9A0023C44 E93DD91CB3A2B377 068D1159ABA55068 9A690B5BD17AEBBA AEA6F862DD63F3EE 88F5C4D338324327 E3C033411B9593AE 77274A569F5F0EEC A0C1451C9A9E0D36 B781253DA13FC1DA 5DBF89556E9409FF 7D09A2771CA7E3B7 6DDE0EFCCE1C6AEA 2EC1045D546E8D60 E04C8A8B5E0B5737 4C31BF1C493B7B57 08D4821EB5354390 AF08B4875D274AF9 97E8CC8CD97637A7 F5FAA5D34E105064 F00D3B6698A80D2C A467B1325EF02340 D21F0D45F9EC79C3 BCFE6AF22FC1A1F5 2167265A0287E2F9 4867648AABD6ED98 B964E98CE055D646 7E3894EAB5211FA3 4FB053A46B210256 7ECD96F418520B04 5BF0344CF4AE3627 927EF8F7112074AA 2D122AD821552F4C C0F69D75C872747A A46443D12112C249 AB2938984D40C23C DF58D1AF5FBE4854 78D6D1081D9F450F 6E93B8E61A38CCDC 40A236BA7F13A847 AF9E5A022AFF7D06 B3AF3FD03A6371C5 0907908AAD85C2A8 70B30639441273F9 2583B291BA17DDEB 722246AB9AFF27FF A333A103811D5C6E 213FE892593CBFF9 C6D337E5D350DB2B D9E3FC780927E8FF 4AEF87C10D44BF41 9CDF71F6DAE8E9BD 4E487D1530196E61 3285D0DBD6E173CE 877A50B19C9AC0D5 C6B0CE1F385DB4DF D1A796347623CDD9 7DAEEBA3524A40CA E60F6E1A3E91006F 270151E31C1F6081 632BC7CFC7C809A2 19D438219F9AB9C5 40FA31EB0D1B3BD4 49D669E87182E4DD 40EF481F5368B6AD 533BA0CA4DB22AEA DEA712A0E141D655 0250D2A576CA94CF B1002D55CAD82745 04EAE8F72F9D2C1D 48E391F99F839305 9028F1B14B6275C0 8FC953E6A8F72C48 D2115745103CC481 13D6D6C8416E9E8C C5B76CBD3B4DBB8B 72A0BAE1B1376888 9AC312782F3FAC1C 2E136A3B71C19422 25B93E12B11424EA 6545486415BD9E5E 199F1BE02E55970F C7BEAAAA013053DC 518D658269327DA4 FCEC00FCD12DAF6D DEA569C48D0E6AFD 72799FB328946186 89903FD5B6F8B7C3 876DA786C4A959A1 04A28D1D00A62A85 2B9ABC8F516A842A C70FFCDAC6C38342 FAAEFB3B33678711 86247E0B4E1EFF50 3B96C68309451174 4D0114FC24E63F64 A5CC7358C6C8BDCA 1E7D146CE6FC4ECE 9989054488C2B35F BD42E40E476205B1 5070EA31CBF1D735 95550F7ECD453FAD 0D4A72F6B606D3DD 9E09B48855757B13

Read the ciphertext. Strip whitespace: 3,536 hex characters = 1,768 bytes = 221 8-byte 3DES blocks.
Derive the key. Password = A858DE45F56D9BC9201209271300 (name+title). Key = MD5(password) = 69dc6cbe1e393858c4cce2eb19473148, used as a two-key 3DES key.
Decrypt. 3DES-EDE2 in ECB mode, then strip the PKCS7 padding. The plaintext is 55 GUIDs as hex (shown below).

Decrypted: GUID list

  1 2a153a0a-188b-52bc-a71d-899ae931ec20
  2 c7921d0f-4fdb-73a5-b1c8-225cb43f64da
  3 07a61ba8-b3da-7361-a09f-34b4aa74eca0
  4 c2f784f9-9c0b-33a4-b721-5810195b57c9
  5 dd64725c-6b80-0819-b181-68aabfbaaffe
  6 a53aabe7-5dc7-509d-b145-77914551dc08
  7 d57fccff-ab0c-0d44-bdae-d498caff7930
  8 8c01fbfa-9b27-288f-ba8e-fad8e3ae718e
  9 151b3430-72ad-04d2-bcdc-99ac0b227836
 10 21dbf16f-0d88-7baa-b05b-a52844a5a97b
 11 a7bedf1a-e41d-6d9d-9971-70d345cb50f6
 12 24c08ce6-b133-0bb6-8098-be8d9e49b12f
 13 a1c3d9f1-bd4d-7365-9023-96058833a402
 14 3be37098-aea3-6066-9a2e-1b6c7f0843ac
 15 a7dc383e-f8db-7f04-8b53-275670e12e54
 16 469c0aef-8c65-26c3-87ec-1b01d9ca31e8
 17 9abe821d-56c5-409d-bd91-b7b5f539664e
 18 208b9bae-27d6-6adf-a455-bc61d9e39067
 19 a84bc1a4-65b5-6aff-8dc8-e121d4085438
 20 7fad8550-2bb7-18b1-84e7-7bc33ab77b30
 21 a1fd5202-ae2b-07bd-80b9-124514523294
 22 15c5ddac-1128-4e3a-8381-f056b97c52ce
 23 5a55c6ea-3d6d-25a1-bd23-0ba9c9883f72
 24 533995b0-4404-4339-8189-cebf146f0d85
 25 efc995ed-1342-7f2c-b403-bafd1fb54112
 26 d6983df4-01e5-2f1b-b97f-506243901778
 27 e8021d8f-c33f-80e3-bb3e-dc562035169e
 28 d4bab7da-de66-147e-8582-eae7fa89ad5f
 29 8deda588-32ae-1df1-880f-e6f91cbe8a39
 30 e35d070f-777c-7805-9046-228d4edf2b7d
 31 e09e685a-643e-0874-aaee-022eb00956f0
 32 b878290e-8dc9-1c68-8a0a-c97dc80f98a3
 33 e84ae1be-ddac-67aa-b4cc-370ff2a65f66
 34 a25e1981-b6c7-46af-bc0e-236df31950bf
 35 be5f4a00-258c-86ce-b48c-61282a7122c4
 36 7615a985-9428-3fa3-976a-20a15cc21297
 37 8517b15d-f54e-5457-aa89-85da2871de9a
 38 7914137f-90c8-8673-af2e-a9700e79f87f
 39 763c89c5-84a1-319d-8f8b-33c69e808978
 40 a5e31714-b4dc-119b-b98a-311b9d9bba87
 41 489ad75f-34c4-0faf-8633-9cbd4c851a75
 42 cb63431c-13ea-5aa4-97ac-e65dc9815c83
 43 d5774183-857f-6fa2-a881-44135937e587
 44 c9b49dda-426e-1864-b889-8d51c18be2d8
 45 b5d4d114-eb13-50b6-8683-75eb2500bc3c
 46 5628562d-702f-0dbe-a616-e52114933654
 47 931931dc-650f-64cc-95f7-362a52acae77
 48 e424d198-f3aa-5ca9-bb3b-d18ca3a1bb1e
 49 16021244-b182-04dd-88d1-0c2860753e07
 50 3cdc9c5f-976e-86cb-9893-c3713f46d92b
 51 aaf87f25-a395-6646-a414-8191151b91ce
 52 a8ab1d8c-2de5-8bcb-9dc2-5a9e82ffac69
 53 a612c2d5-24d5-215b-a566-dcb2969f1d4e
 54 6b48ef20-f76c-7a99-b043-b14eeb9b7bb4
 55 78c3c0b5-580b-6ffd-80c1-0302de674a1d

Explanation

Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 5773050207607672466104247281170164835831056150650868276. Exactly this sequence comes out of new Random(777).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 271 of Run 34 (seed 83,105,000): new Random(83105000), Next(8,64) per post. The RNG predicts N = 55; the post has N = 55 ✓. 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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