201212111900 14p06z

explained decrypted filler

seed 784

Metadata

Post ID: 14p06z
Title: 201212111900 → 2012-12-11 19:00 on A858's clock
Posted (UTC): 2012-12-12 00:00:08
Timezone: UTC−5 · title 19:00 against posted 00:00 UTC
Author: [deleted]
Account: A858DE45F56D9BC9 main account
Subreddit: r/A858DE45F56D9BC9 the main subreddit
Category: F3 filler: 3DES(name/title) → GUID list, seed known
Size: 3,664 hex characters · 1,832 bytes
Cipher: 3DES-EDE2 (two-key Triple DES), ECB, PKCS7
Key: MD5(A858DE45F56D9BC9201212111900) = 225ad1ea1428f685fbfbc2c7048becde (name+title)
GUIDs: 57
Filler GUID seed: new Random(784).Next(9) ✓ verified
Run: Run 39 (seed 1,106,402,812) (seed)
Draw: 102 · predicted N = 57 ✓
Machine boot: 2012-11-20 22:02–00:02 (seed = uptime at app start)
Sources: community-archive, arctic-shift · body from community-archive
Links: Reddit · Arctic Shift · JSON
Score · comments: 8 · 3
Tags: automated (decryptable)2012Encrypted masked GUID listeditedkey: name+titlerun: seed

From the post to its content

As posted (encrypted)

A959FBA2AE7324CF 865876391C93BE00 10DA8EA69B530C6F 4A20836662A021AA 61DB87BC8AE938ED 98CCF3C9F7AD8387 0033A01BDB71ED17 48A8F43EE0BA4716 E2D3C5B7379748E0 EAF971DE8898CC39 AFB29E97FBC66FF2 10CE61DB9ED8D8F3 2412A3742A0188E4 52D9CBEC23E044B3 DD3D8D29A2802387 5D288513EC224470 31FA343CF630C34B 76450BB21D0CF927 794476135C4A2A51 81A0E9590DC62B7B 9CF3C180A8B51FDF D2DB2760AA1F42FE CED2807409F7F0DB B361A49F16886142 E8696C364C659D33 69170EA525ECF3F6 DE810193C49A4121 067185A8DEE11ACE CE76A366A69846EB D8E4B0CFF5F4D421 4CDF36542FDEA216 E63CD3935693EDAB D509FA5BD1F49C95 A11D1167FB26AC1A C8A15EB0DA8A2C91 8A91DDEB81DF82D6 7484D64B0C28E412 F864C803DB8F4AFB 7F582DCEE156AD1E 0D6F8C73AAAAF750 C90FF7EB2C0426E2 9D2D2A5771851A1B 69A3013EC671DA51 989D2D69263685C7 DD8988D2E82C14B6 439A93141ABDCA1D 110EB4E5F7915324 257804C99FD174C0 3CFB769C992CE6EA 1F9D8533C5E29E77 9BFEEF2CD479E05E 040E9718ADF1030D 4D72C920505732E8 BCFABF0F85D44384 C7E6988624457F27 EDC3962F2D081D25 D6D8EB4BAFC7845B FB09DFF59E27BC5A BAD82D1BFF326D38 34CB4852C5513479 988C7A75877A335E 9EB9B3F28B12E995 D7F4334E762EB184 D32EF218BE162C72 F38BE0A8B55914E7 3D21F11039B93862 4DBD43A86D8591A1 B98802A0B315A86F 3483B7F561C462F4 6BE2ECA1AD8AB161 0F9353E71ED546F2 529884D6A78F1012 8A07D6C51E0E0736 3DDBB0F029F5A000 9D11345AA37E1140 C7A756DC6DEB1EEC 8219EEF1AEF6AFAC 1EB404DDE7AF062E 7BC7FE92B960BC22 73383B3AAEDA5532 2D94F694A994889A 76ADC9796A89477C 6B3DD1D43612AECA 6AA4556BF4BBA82E 70E92D37B608FAD0 727454584EB06013 66F2E482129887EA C4CF178E5F661971 B2995903496804C5 15148733EC4EEB9B E55518AA29026800 569993546E1AB04B AF3FE396A230A28A 9DBAE06CC26FAD76 7F78FF99289392A5 C2C252ADA74277ED 62139DBAD4612435 64B12C52CA526E3C AAE99F319CD27529 76D06E88F6BBC87C 4628B2A193877723 29FDD23E14B40E59 B139F124C520376E 1DE9567782C16E5C 6ACDB6AFB0FF2841 E515888302D6D512 B4A5131EBA929D0F 8733AA43F388E195 A648E96CC0326DE8 5A8657EB2E20A5A1 4FA42EBD18F2C197 585A51336A0D3E70 0B1AA5BDA369933B 3CB8AACE97511B93 29F4D50164598220 E8A94D74F1109FE7 BFD44F9929BB720B D46BBD7254630EAA 4E98D69261C840F9 6CCBAF6196673943 0BE4E593B9752C8F 6FAF29B68ECCF761 0612A7876FBD855E 343B3581AEC1EA82 6B7FA0C2839D2378 DBDAF078371379E3 68A36E8C4DC6DE34 EDB59069712209BA D35BDE37FAC2F7F4 D5F95E5594148692 D190B6C36896D920 7DDDC5BE5EF97C17 836FCFC9B4FC4DF3 9523DB74A688937C BCAF5AE3F3AFF08E 89B932E3A9A6C955 38C530C700028A07 0A07452E48C2E243 328EAC6900E7E69D 756FE6C5CA573F5B EF1ADFC334B4801A 330D24103F9EC95F 3E7FEDE82C0F327C 00A1758945984E37 6B4A7BD8A8CAE484 45344DF6E7B934E2 FE4F35F2EBA9D488 9522BF3CC4280B57 E30E359C009CDBB1 8536DBCE9F750B0D 37CDD090B9DEFABC A1BA52C21A829C4D E45D700A5037DA79 C544669F0D5C12AE DA7263E8582820AF 820C26F927E4C87F F284C222FAB6D91B 81BA32FE5D1D77E2 839A0856F335B40A 89ACC755081BAD58 475073C2E4C1F153 F404A9FD60D8BA9F 8762AF33101DBC65 9D242BC5AD9CB3D0 F3E13DBEA6488F1B 76F91EEEAD5E6E32 55322A448B7DB715 E5D12EFD94467845 6E4BAB6BCC968335 D777AD38452EA4D2 A6820F2DDB7184A0 DE22E4EB17E004D2 1BA43D786D3EE6E5 A87A1801A5288303 A4D1FFDB44086BCE DD4E1A98ACE36A66 692AB3F6D5E71443 49C9CF0C2A6BDCD0 F43C1FEAA1EE66B6 5A8523A18F8F1579 EC48A3FD2F65F335 26E81E8FAD929ACC 25CD5ACC77AB3CF5 7C04158C65848EC0 C423CF066B3E6DD2 B563C33A9C58F5B0 146EBEE9FA9C8F37 1475741F8F7A91A0 1A71F658BDC42AD3 88E53FD62A6D439D BE0E6C60A4180DEF 1EE19C846834ECEA 236458582D74E214 6E3BCF7B47A3FFA6 7EAB4DA40F5917B2 536F93DAD6971A51 CF5DC4AAFDA88B92 0993318A55E05BB3 9DB749B552190858 84A62EA6E99D9E16 362021AAF93DF5DB D5A7757F86CC9C8B 3B8BC9A08343C0CF 96C76268FF73DF75 3D112C88A67805F0 07DFC47A749BF516 4B127D80E92417E5 6A229EAE43F7B5DE C93E36D868B86D0A 0E7D348F2F10A43C F926CD142F76F8C0 02BCE14BE67FE167 FC14A67C69A3F66C 6F897246E9C83C58 0E5DD510F71D1951 AF1E1F0F7F1FD0C5 975A736E4C0871E7 D66BF39B8FD5EA8B C461B6E548D0C051 06E62891FE75B881 D736FE5E824C3349 156E295296C5C340 0770CFA81E48059A 2F7C2F306F9DCEA5 2597DD621699D4A8 BE1E30B11BFA24CB CEF710D79D4F6A56 35EC91ED50C2F9F2 C316AB9D35341038

Other archived version (the post was edited)

Read the ciphertext. Strip whitespace: 3,664 hex characters = 1,832 bytes = 229 8-byte 3DES blocks.
Derive the key. Password = A858DE45F56D9BC9201212111900 (name+title). Key = MD5(password) = 225ad1ea1428f685fbfbc2c7048becde, 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 46c58b00-a3d5-23a2-bf66-34fa4f480948
  2 1edad408-837f-7f04-8af1-3aca857128e6
  3 3b22c2cc-79b0-6cbc-b716-c3ac7090bc14
  4 3795bcbf-effb-8291-8376-1122ea1cb0b9
  5 73d80f4a-5812-1b37-8cdf-bc32e328ed31
  6 b3edff9e-de6f-620d-901c-31f1d2284b55
  7 2fc9a58b-d113-1aa0-81d9-b9d07c18d643
  8 0fc2c603-d8da-6c22-87f9-5063206199c3
  9 5e5e74fb-ad87-8681-8e6b-8021a70f0601
 10 e535b401-fd61-31e1-b960-26d6622ccd7b
 11 d7551539-529f-75e4-98e0-843a1bde9d77
 12 09905e2c-4bb8-43c0-bc1d-b90b35da4eba
 13 f5016992-d46a-5c6a-a203-796bf111269c
 14 e3bb4d03-f9c0-38cf-bf1c-5da5cc0519b8
 15 1725f8fd-54bc-68f2-aa6a-dcf18b0dc0a7
 16 f73c9a0a-7d2f-574d-8203-a378543662be
 17 924e7ab0-ddfa-3320-918c-e7e307759d1c
 18 04ad5aba-df84-09c1-825c-2aac2b549d9f
 19 e115ec66-a557-86ff-b22d-5c40c684aa0b
 20 2ac0373a-0c0a-7570-8e1a-89afa0285333
 21 362954fb-4cf6-80d1-9ed3-37828b1c6c46
 22 e8acb935-424f-144d-9ee1-9f8307c423a9
 23 e954515b-9e55-48b0-bff0-88d807a782bf
 24 531c6afa-2377-8a6b-b1bf-74dfed9d4c06
 25 250f8237-249e-4953-9bc8-789c13c6fda1
 26 a2d96ac4-c941-7c28-b07c-a535b2b3422d
 27 cbe6eee4-7803-8867-a224-9855b998a980
 28 4fa8f476-f37a-42b8-bb7b-c7cb7df3e240
 29 4f5d5c49-b904-00f8-b966-0304887fd7e2
 30 053627ed-f2d1-4fea-aab0-d3bc66f59949
 31 6f8b688d-7d8a-5538-9764-541aacfcd9d6
 32 2cc98fa2-407d-84da-882d-c4037020fc0a
 33 f8c50544-85f9-53c6-afe7-c0dde058724c
 34 fec52b4b-7f6b-527b-8371-5d5cf124a3d4
 35 44e67626-3a9b-3c26-8c76-18e85670899c
 36 693bcfb6-501e-625f-bb49-affde61f3c75
 37 1d57a30e-02bc-4a03-8c3c-dd2bd7831377
 38 e9e9ca6a-d2ab-6dd5-a60e-4a07869fdd63
 39 cfc00f27-9adf-5418-a519-12d06d584bc7
 40 ec4d2fe8-cb89-1e20-acfb-23e6a39225d2
 41 dd80c596-6043-396f-a7ca-bbd313720c2a
 42 54284f30-0adf-4e10-a5a3-090b62674f68
 43 4b03315b-c749-6b81-b663-ab7e9ce64bdf
 44 3e1c36b5-6bd3-8df8-b1ff-c0dffa71c813
 45 2dea857f-fc9b-2bbf-b94f-7a286be4eb16
 46 b00694ec-97a4-105c-a9ad-cf74675027ce
 47 3739a335-71ec-0356-8355-7cf6f51d4aaa
 48 6c99b1ce-2d2a-65f1-8edb-b27770c515f8
 49 a81a9277-6a29-687d-a0fc-e4e66f5df7fd
 50 61fcaf06-5dbe-7c9d-aae5-82f3e47c0782
 51 213d8384-87cd-43e3-9cb8-61b62d9df42f
 52 63024325-42e9-05ac-b031-37614807bebb
 53 00e4e425-f5a7-325a-92fe-ccbbc96a09f0
 54 a77c23c7-a80e-13c8-9845-d403a096f7db
 55 69ec486c-0bc4-1cb1-9cf6-dccfd204a018
 56 f8611e7f-745f-1244-ad46-6e5847fd5f39
 57 aecf97a1-2f9b-3d90-ac89-6e5a94801e9b

Explanation

Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 276816168374536530878148478404585536465134682106674031113. Exactly this sequence comes out of new Random(784).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 102 of Run 39 (seed 1,106,402,812): new Random(1106402812), 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 2012-11-20 22:02–00:02).
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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