A858DE45F56D9BC9 archive

201303080608 19wn7s

explained decrypted filler

seed 490

Metadata

Post ID
19wn7s
Title
201303080608 → 2013-03-08 06:08 on A858's clock
Posted (UTC)
2013-03-08 11:08:46
Timezone
UTC−5 · title 06:08 against posted 11:08 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(A858DE45F56D9BC9201303080608) = b040091d046e4c23ab6b9019b67ad57c (name+title)
GUIDs
44
Filler GUID seed
new Random(490).Next(9) ✓ verified
Run
Run 42 (seed 983,934,859) (seed)
Draw
254 · predicted N = 44 ✓
Machine boot
2013-02-13 10:26–11:32 (seed = uptime at app start)
Sources
community-archive, arctic-shift · body from community-archive
Links
Reddit · Arctic Shift · JSON
Score · comments
6 · 0
Tags
automated (decryptable)2013Encrypted masked GUID listkey: name+titlerun: seed

From the post to its content

As posted (encrypted)

BA2324D3C669D3A0 36F2C3FD8BDFE9DA F5175EFC5001A321 FA9F3E0187A3472A 1CC1E753E8125C76 4BBAEB3F9C20893B B7A5E651821F4817 676112C39551E980 4DEB01B90E1CBE96 36C6AF480FFFF554 BA15F8E7056377E6 0DFC43EF53A9832E D3B69254EBF29609 410D3C8FA86DF955 D945A22E078928C0 1D24E49D7F9CCEA8 91655EFF436E2FB9 F42ED57CBF43428B C9A412D04F9D4FD1 02037E76348DC14E 5F42DEDB2B1CC6E1 2E912A02A91191FB B98D91FF86BA112F 1497CC534F5A7E47 DEBB0D572274B3BA AE0FFDCE1D43F154 E779882E79AABF80 95A9794134C8D244 DC3C7BFB73763A0E D57021ABE6F7D8C3 DD01540876DA717B 9FF1C2F445A606BA B8EF93127D1BB73F EDC7E48E06A8EE7A A0A2C61C284D295D 2948B33B52E619BD CBF9F29624345C78 2B3C2B06C25763C1 446DA7BCF527E98E 2B6492CFA8CE3B9F 36BE2AAD5449F798 A530AD734560918F 799ECF7D43EC3528 9616871D91672208 5852E89C8E6E8C2E 94338FD08D8D8454 449F7B79F62D3408 0920CCA034124F98 C15D37DD4F4ECC9D 88A17E0C0C4BE780 B3D7B2F3B078C7D4 016D2FB4DC368B49 95B96028B40FC8FC 0B7B465EF8D4A1EF EDE91D8D3BA17C47 D48C70503630C081 DB3BD67D3D7318F3 D75830AF66FF7218 742D3E8F843369A7 4B37DFED3633D09F B26E3F4EDBD36430 F9E9A72F20DCAB55 E0C17110155E09EB A8E83C4B26D2B640 4580216689E78970 560FD2232A45EA47 225D5D4F3A881F14 091E7015B286F31E B6518AB10A44A859 498C4F82DF2629C5 0CEDD5D3E0840491 DF3A066F14014730 D639D3A70FEDA0F5 C276AF5CDD5F06CD 5D2FE08EF722177F 4A890D24F8AF3F2D 649CDBFABF3A9BA6 FCDEE74E2CF6703E FFC5701450D19B16 61FD75A5235C83BD 48E8597BA65F46E0 9164A89ACAF0BFD8 C85820293410B993 2E28B1E98A53A4AA 9EE707B9E67512F5 EEB60D4F6EC28AB5 7A718F5870122BF2 93C2F82252431678 D1A1CCFED518855F DB7B7F6C6836AAE2 F1C655740506785D 7DF68D4C25CB6C0E D7FCC5CCA1AF428A 9004B9575456D8BA 40A989F6BC6B9E8A 4A1671CCCC8A8E27 16767CB7F7E991FD 14123C69AB26CF9D 8A0A194C4A031235 8BF291F8DFCE6141 5DF8BE8E1DCC8E11 3993CA97C15A3219 4465929731E0DAF4 AC8A7A15890E8FBF 9AE8A6FDD2FDBB68 D2B52187104BA9EC C928D91776114BC1 7EA831017AEB87A2 E935E6707174C30B 016BB9597FA76247 C109AB1EF537EB46 7BAEAEA5EC2E9045 2967921CA7459DF1 3ACB3F9252ED8B43 21ADDE1A063558AB 3124342C65A9E34C A3847E6977740897 16A00129C67343D2 6560147C44CA7CC7 8EC7E82C0A94ED37 2E323D451169259A 9CF45AABCEAC4CAB 0006FF8FB5B72919 BE75F6148E698B6F 82601B013D55C2B7 ADC7EDC592F76C58 D33807E938D25312 681B0370780883EC E4D5D9A5FDF27FBA 611DDFAA2631E108 628C73C4FF4A7463 9A5A1E754CD1AEFB F5C40436D711F258 07FED909B59213FF 9A13B4106C6DE7D7 FFFDA1063A4451BF 04AE3795C3E77C97 CF227B4559726A0C 70D6170FC24BD468 A8948EF3B0069DD0 8A0CF9DB6605E192 0B5ADBD8A7D52A8A BF8C5FE2E402B145 73F4CDC508FFEB73 7EEFD9AF5F968F31 6040F831D5C46938 FA003D825350B20B 990659D57CF56269 7985004107F97634 D8FD610E146AF3B3 4E30555745416E36 6584A6873C467ACD A213C2B02D41FD57 2407C25175783945 D775D5938B1942B0 A169C2A6F5B1978E FD3EC62D311C6028 8CA4F53DB48184D7 1F604520BB564168 3919614951251E41 00732082328D378E 76C5E8ADF10CB649 6F57397B67E5B1C1 9B0E57ACF2173D11 7A24147AEBB332D0 0673C84FE75504EA F7CDEFFF257714B5 78A5F70EBB4A0E90 08E6C07AD72019AC 928DEB1818E6532E DBB99912F8349A0A 2584F7E0CF71DC1B 0AA7FC5C447D4364 C61B655CC2BB1A13 5D50DF5DD21D3164 AF3F04942C369D09 037312CDF5596333
  • Read the ciphertext. Strip whitespace: 2,832 hex characters = 1,416 bytes = 177 8-byte 3DES blocks.
  • Derive the key. Password = A858DE45F56D9BC9201303080608 (name+title). Key = MD5(password) = b040091d046e4c23ab6b9019b67ad57c, 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 629d868e-df7b-67dd-83cb-a789daf9695f
  2 8b2c158e-a7ca-52b7-8ed6-c5ebcbed9470
  3 1aaa95df-abfb-2b82-aa0c-71b6a6ae5ef0
  4 194ab62c-6f98-1d12-a43b-1f1379bf012e
  5 e2c2c338-0575-3a39-9dac-07c25481aad4
  6 03169fa6-c955-68df-92fe-0a6dbf0ef72c
  7 09e188de-7a77-45b4-95d3-f65165cb93e3
  8 ff8bfa18-8919-279d-a638-b9f042e8923b
  9 bf82b18a-4b38-5a9d-80dc-29c6c414ad95
 10 10fa5d90-f79d-873a-93b3-18efa7053c8e
 11 e93847e1-04f4-2baa-8c93-fbaea64c6ae4
 12 b5a8b553-eada-0d20-aeeb-65c35ec43b1d
 13 54fcd08b-253e-4efb-b487-288c50a539cc
 14 949db53e-3b86-3f9a-8ff5-09841287f01f
 15 91c9a41a-d434-8603-b3cc-9f91bb6a6e7d
 16 74c1f380-630d-0db7-b096-e9ecd38053de
 17 cdd51e70-9c8b-7796-9661-d18d38f1d44f
 18 5e84efb9-34cb-7825-875f-ac2f2ab26c78
 19 c877c25b-fc71-889c-990f-f2b0f4b3618a
 20 8edbe49e-3aee-086c-89ce-c2c4220aecda
 21 8ddfa007-8843-8a56-aa76-8323b9f12aaa
 22 78dbe43b-91cf-07b1-8a68-cfd9d748fdd3
 23 e776d81a-a5e8-7423-a84b-efd15ad0e149
 24 352398d6-b21c-1821-b59e-1038d1d1b226
 25 4a0bb6e1-4813-607c-96ad-33c7ca6ee3d9
 26 4acf878e-22a1-638c-bef5-55c5ebc1c400
 27 41e91a9a-5fb0-1a3f-92bf-b9ccd7056a0f
 28 f5efe90c-fd29-2627-af82-755a6fc43170
 29 dc135277-01f1-8344-b678-b525ec03a774
 30 852ba90f-29be-6b8b-8137-993b4e779d44
 31 4cfd4d9b-2496-04c6-b909-3ff2c594359c
 32 8d2d6a87-c96b-48da-9034-681136824dc4
 33 b5b93053-e151-3984-81fe-2c4054e18cea
 34 09fb8816-35d5-249e-be89-f7968ea9ecc2
 35 ad4c2f6d-00e2-6696-bc76-25092cbf23a3
 36 41af1024-9ca8-80ac-9e05-1df3ef777e6e
 37 f8fa1a56-7241-8aa2-b161-fe50458d9cb3
 38 d6aff54b-07f9-2ede-b3d7-ff27f95ce7fa
 39 b21ed382-cf2d-27be-a7c1-e8d5f899b349
 40 96fd206e-11eb-1186-a8c2-ef97b6cfb3a0
 41 0da8f24b-08cb-67fb-aaef-43fb90934ccd
 42 967601f7-8620-7659-a82a-26d1b7373b1f
 43 958f45df-1e9b-4c16-bc7f-27ae7240c902
 44 3b93e3c8-a5ee-6aa2-be6d-1aa1e1111f17

Explanation

  1. Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 65213642582043807780807166128604326882216746. Exactly this sequence comes out of new Random(490).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 254 of Run 42 (seed 983,934,859): new Random(983934859), 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 2013-02-13 10:26–11:32).
  3. Conclusion. Filler. The content is fully explained by the two RNGs.

Related

Findings: Mask digit · Count RNG & runs