A858DE45F56D9BC9 archive

201302091559 187l3g

explained decrypted filler

seed 615

Metadata

Post ID
187l3g
Title
201302091559 → 2013-02-09 15:59 on A858's clock
Posted (UTC)
2013-02-09 20:59:58
Timezone
UTC−5 · title 15:59 against posted 20:59 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(A858DE45F56D9BC9201302091559) = 0563f07c3cb2b4588b2d17102f5df002 (name+title)
GUIDs
44
Filler GUID seed
new Random(615).Next(9) ✓ verified
Run
Run 41 (seed 1,681,282,046) (seed)
Draw
4 · predicted N = 44 ✓
Machine boot
2013-01-19 21:58–06:58 (seed = uptime at app start)
Sources
community-archive, arctic-shift · body from community-archive
Links
Reddit · Arctic Shift · JSON
Score · comments
10 · 2
Tags
automated (decryptable)2013Encrypted masked GUID listkey: name+titlerun: seed

From the post to its content

As posted (encrypted)

492BE2E9E61B81C7 B4BA70114B71ED2D 9F17EF92C56BB1EA C7FD06E43EE449A3 BDC4B4BDF8E12307 8C9FB1C5872B63E7 2B828C242E6C1F69 04A8B313A3E1A799 56D5E2A84050B4C2 15FD2CF0D0085D79 24E390C3DD3133C0 6776512229F00B96 926E792A8EB78D68 7DBA3A60556AA7F5 EC814532D652F115 28E7F07C6EC81E87 0E663AFCA75211BB 6E8827C5F7D359C2 283A338A3B6E61F2 BF02F54DB95218F4 6492145A9820294B 75C797F137F9B1F7 D3D79DE6541B06CF 1AE8D4DA462DFF87 B115CE99D2AE3975 51141E6552C4C2D5 FD30AFEAF86BC26A F80D441C8C05B440 D6DB1B3B53FF1EAF EE8D6630A48D2FDF CA8B116525875BC3 E0B678303DE3CDEF A7C2B9D1760F9EA5 F8AC067D1205D720 A9C2132379BD89DA 4076BED2064D4671 7A31568CE14BA06A C6A46E1479524AF7 B54413BCCE28F987 F4DA5FCD872EC452 ACB21CDF6FEE3232 7CB30C94712BC3D5 7B18AAD15ACCB3CA 2B50B12E7DA2C30F EB0726BA39620841 EDE84987538F3DD6 851B60461C266A8B 24A818DB334494A1 BF5AFE6987E3A23E DAAB8942136092E4 75B44E6DF8075B0E 42B1A0B96C53DB64 B6DE85893A999CBF E13FA4531E0F720E BBDC69B5BE45B1A9 D63776A306051DA6 B634F63CD7E2CFD3 15FBE51F122F10A2 4A2A737CEFAEDE59 B931EA65B0A29642 333BB4F174548038 FDFE5AA7CCD29B98 48D6CF37E0DABAB9 6BD8BA7D757DE4C2 EDE92058BA663219 AC99F1E370C7F3BE 6B49AF26DBECB4CD 57CE62738E67AC7E 447490D79292D121 22022FBEA064338E 708CB5B81E69EF96 5239F58E9287A230 F27A5A86503BEEB4 36C968B2DD235AC6 D5308E3F79A133C5 D108DB3471FE3F17 1C2250BC5F7E993D CAE20C3423DB8F28 A0887FC6DE530A43 0BB8B990F0FB5258 80FE7651A7FC668E 3463B852223A9199 F5A9A6ADB0DBE6D4 C60DFB66737A705B 30B43FD826079735 9B2872FF423BF5A1 7B602CC874E844DC EA02F5DC81711BEB 9FCAAE5CA29A7D71 1A6D27C9309BAA1A D1CD6612DAEC2C92 7D681F64097AF1D5 EF2466AF55A8BC20 52DF77785C034FDD 373534B3AAFA73F1 3EB50F550F61ADCE 07C4F9184DD4D7B7 1AF109DD97FDDFD8 E553CA5EFCCA2FB4 D86D3DBD50C3F9E6 BA7593D99E8A6AD3 E54AD37DE51D7970 8D1CAE198020A1C5 FFB83FA94AD4F229 DA16F9528BC1CC0A D28D1935B09D250F 98802E36CA8C5D46 A9AF41F0B9643FD5 7D8580539D5AAD1D 475CFEF6DADD2EAB D9732ACEE006D373 335BE8E9ED3B96B6 89B3AE9C07B48EFD 8936DA94A4D49134 A876E642DED776DD 43A3D2DC9A533EC3 04BDB907103120C3 AEB29FB7D6C80E96 75DA8816DE7C9C82 5CF0A938DC138B67 0A80FF429D3CA80C C4771EB674A5A15D 484F6FB2548D77FB 8AADF7EF5B65DB64 7DC85D527A8B3A06 4C0C87E53988DA6B 4CEDFA2B2D70533D 421D2DB667069308 5C75DB7B6007328D D821FC383BA4DB2E BAB5C576F6769EBC ACF2D251D1E46406 165044E1C45A4EC0 4281AE2A1E1C1C8C 4AAB918BDD4043AC 3D7E5F1E707DC9D6 88D837E513A22F69 EA3E5F2272AB628D 962549E5FC2962EE 7B00FD61EC895EF5 68C3ECE8BEF1241C 7BCBF5C1580A9490 5B99C00CD6EEE218 9726301B9B11A582 05B6F8222F01479A E1B3F8F2C7F7A71D D06A906D62C62458 6653DAA27C56992C B9E6984D3A3726A5 1461DDC23ACD7A33 696FA291FFC40444 866FC4D4AC282C45 D51A96965A1E06D7 C5E271D88853A541 21B04222CCB129EC A19476B9AD4E9F04 854F6894D72D2334 A76B50207A830439 014819F3F98CB0FB AB8784A40A37F53E 0251442F2F6EAB76 D96DA271AFA3EA1B C5A88A7FB65B9319 1A74799305F1BB4E 4557770D7B26AA06 AF71BB9D399AE1FC ED8DFDB0AE8B7DB8 DBB43F352D7A13A1 6014016273E1B90C F35B0463611345EF 40119FF0D95B7245 6756721B8878F8C5 40E8D8C45E0C309D 3DF53D33722E92E3 CCA03C5232D63880 2125CBD004731286 0F910B9A4D73D079
  • Read the ciphertext. Strip whitespace: 2,832 hex characters = 1,416 bytes = 177 8-byte 3DES blocks.
  • Derive the key. Password = A858DE45F56D9BC9201302091559 (name+title). Key = MD5(password) = 0563f07c3cb2b4588b2d17102f5df002, 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 b01a5e1c-5667-0b41-a3f4-a599286bbbf8
  2 90f6ef30-064f-27ad-8d73-fb1b48a98e25
  3 96e27b50-3483-5c4d-9dde-1813ece3f355
  4 2fcff145-123f-7732-b1ed-335c59a6ef3e
  5 f7855db1-ebaa-764f-96cb-262c44034950
  6 4a01b4a6-faef-024a-a28f-ae34d3e4b3dd
  7 a42f7d04-e1dd-4d12-9645-1eca3462ab13
  8 1e19a0b8-efa3-8ec7-82de-08c585ef6882
  9 5b777464-8638-04c3-95b1-cfdb807accff
 10 b69b46d0-a3c7-09c4-a728-aacb10b57599
 11 e48e9b38-7850-3c69-b793-676011ea29f9
 12 bb71612f-6039-543f-a28d-3ba1643c8672
 13 6f5600db-b558-33ed-8f6d-df595547e222
 14 81e766df-7934-3d89-8f42-426610feab35
 15 a7946c63-06d6-4c85-81d4-c85ab6ebe911
 16 9200a0ea-d58e-0ea1-8edc-be45e52ff153
 17 769fb11c-0714-3068-a414-957942038d77
 18 016c47d6-6ddb-2cd0-8ccf-f4f4bfe85720
 19 52bd871a-6cc7-2de4-b0aa-7978388e108c
 20 dd0d4f7b-1b69-4f35-89a2-3c5d755de27a
 21 dfef1bed-a195-4e3a-83b3-dc3e2305b689
 22 8687bb90-e53c-692a-b42b-a5254cfb44d0
 23 0de55507-bcc7-8c02-a620-219dbc904931
 24 2eaa053a-6ab5-77ba-ad6d-840b84c51ab2
 25 b9517078-84c8-8e5b-aae7-345114c77c19
 26 2b3711b1-ff5e-059e-9732-3fb85f6ad9e2
 27 d7824803-8d17-6867-887f-dc703c61fe65
 28 b967bd78-67cd-6d3b-b6c1-5fd8aca98699
 29 3cb97b83-57a5-38c4-a33a-f882136670f1
 30 3ddb0e28-39b1-3d16-8b11-b335fff1b39d
 31 9d8eb2d8-b27a-26a5-9c10-b3ada9ff8cac
 32 caef17cb-7e57-4c0e-8790-7e2f10373429
 33 78c0834e-4bb7-5de4-b33d-9bb0e2a34449
 34 2323d5e7-94c9-3c36-8a3f-c603eb37a4be
 35 88be812d-f988-31f1-989f-1d3188132fcd
 36 2e3f7e13-7aa8-333c-b531-7eb2948721ba
 37 503be67b-6c8e-43f0-8429-2ce351ea7a45
 38 47719891-e939-4019-8500-482abe746f5c
 39 6104f419-6d0f-5ae0-b583-c66e2ee7b762
 40 8fd2a38e-ad89-10bb-b6ab-ad1857c3ddd2
 41 077b209a-0403-5173-8987-b602ee4b1ee3
 42 a1f9c00d-9e16-5440-97c2-4eb70439faad
 43 d6b1cb76-e8ff-87ab-8001-210e8bd09d9b
 44 ad147b9c-9f4b-7758-a837-4da8e9792a6e

Explanation

  1. Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 02577048003533403224468780663324533344515587. Exactly this sequence comes out of new Random(615).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.
  2. Explain the count. This post is draw 4 of Run 41 (seed 1,681,282,046): new Random(1681282046), 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 2013-01-19 21:58–06:58).
  3. Conclusion. Filler. The content is fully explained by the two RNGs.

Related

Findings: Mask digit · Count RNG & runs