201303210100 1aps97

explained decrypted filler

seed 710

Metadata

Post ID: 1aps97
Title: 201303210100 → 2013-03-21 01:00 on A858's clock
Posted (UTC): 2013-03-21 05:01:01
Timezone: UTC−4 · title 01:00 against posted 05:01 UTC
Author: [deleted]
Account: A858DE45F56D9BC9 main account
Subreddit: r/A858DE45F56D9BC9 the main subreddit
Category: F3 filler: 3DES(name/title) → GUID list, seed known
Size: 3,344 hex characters · 1,672 bytes
Cipher: 3DES-EDE2 (two-key Triple DES), ECB, PKCS7
Key: MD5(A858DE45F56D9BC9201303210100) = 1b71c90b45137c3daad2aaf203a93b42 (name+title)
GUIDs: 52
Filler GUID seed: new Random(710).Next(9) ✓ verified
Run: 1aorpo (short)
Draw: 5 (assumed: numbered from the first post)
Sources: community-archive, arctic-shift · body from community-archive
Links: Reddit · Arctic Shift · JSON
Score · comments: 9 · 0
Tags: automated (decryptable)2013Encrypted masked GUID listkey: name+titlerun: short

From the post to its content

As posted (encrypted)

DAAAAC6B58C35BC1 B21CF06415AC1AEB 2B7449CBBA03D81E AAFAEBAF88D78FD5 FDD01A4D3AA107F0 047DD271F1DF48F9 0CECBF7C413461BA FF5CFD6933D543C2 C217027DFD8B5D20 41BA29BB9CE26395 FDC481C52D740EA2 122E50BCE737D795 17AF6CC839954FE4 19A61DE36204B28A 41EBCF1CB27E83E2 37131DACE90B65F6 240257A3CE026C05 86264ED762551D9C 74675018714D989F 56AA2321A2007A2E 13AAF673880E9435 4D7F0B8E468E6FC7 818C8B6435794D6F 3800520E0AF02496 B00F57ABDC38F93A 54A887F16765F4E6 F2EDB5D5696E2E51 610571A4A968AF02 140E990C686FD743 9B164844564147A3 6F2A0F9F636E95F4 AD4790344EA59C7A 537C347B007D3374 3C6CB56BC1404D50 76520CADE79E3580 7C45CB8B6789CF0F CC366F3C63F97B74 867FBB1CE8A46EFF DE8B3F94D76011E4 9108BCF8A2C37F30 4210357674442282 2FF2A3B65C0162B0 ED16FB5FA6E755B2 1F6BBBE4DD8B3852 085E852F0DEA3CBB C75FBCB20E558B72 1CD8D42163EFDE7F F72CAD5940077CBA D0AA5D4312E9351E 2A6B4009010EB5D5 E9B9D117BD0CE61B 015B304B82887DC7 FFD62313E255B4F4 31ED18980FAB1862 619ECBCCB8528695 A635EAB555BBF764 654103765D65BA77 CA4AD86A875233CD 5C0AA158329DB841 16A5CED3FC9A4741 4DEE1B539C10C468 12D9512B8634F62B E568937FF5145DDD 5E1454AA3ABA7BCA E2FF916B968F1D29 571D73511D09852E 92F56BA5344164F2 0166ED48E789B2AD 0DEC07D6637EF57C 6976A826FF6E0433 5692BDE6A079D0A3 5FAD7A8CC9DA888A 6705953942D488F6 9224AACBF0BFD15D 9A3F13092AD2BC71 D3E01A02A2C316D6 32DCBEBD5CBD9756 15342C78446A8094 E2796107FB08FBF1 E9310A32AE67A395 B894CEA8F965187B 67A9D4B5476E61B4 2AD3BDEAF7CC3EBE 505536790BFA5DBC CE11F1BFD9867293 5CC2E2E5E9DEBE33 DCBC0271B0719E73 A0497659EDDA281F DAEDC1B711E73CC7 EA70B914E7C70348 114C8CAD8763CBF1 D7DD2C7FBCE1E65A 1C591559AA1EF43E 9A1F25083918798C 155038663D83418A BCE492887B870B7A 76E55B2A5465E407 8177F40274AC3842 3FCDCB292F5DFB26 691E8ECDBB52E361 4B2AB13031B743A6 1335A89A205005EF 578E09DB9095CDD2 653006917BBDF187 1933BD3B88656443 427D74C2497FF8E1 063E21FE4AE9DA5D 3B88E396BDA7DCB3 C2A97FB861ECF369 98156572C5E28E6C 15463826BC2952A1 E76FE9EBD67DFB03 F44ACE75894F7626 A199D47FDE48C55D DA9BDB207DF98794 AF2BD7147F9E24AE 510A0CF4F27F49F7 6A9999C3CDBF81B1 C5D6158A5567AF9E E0FAE82963478306 51A522D02070890A 581F5EEC373CD666 DC517845DCAFFE74 D79383D703487EF9 A021A323CFBF33CF DEAD651BFCEC0D23 D6B88DA842A973BE D87E3ED2AE984BD4 D00BE075CC9282E6 5CC01865F72F1FE3 689EB0C1C0903E71 D89F7ACD66B571E6 5EAF0D09F856560F FDC315C62F7D404A 71C0ECD56607FB61 29834FEB277D27D0 81ABF0FFFCD44695 3DE6416600A98544 D4503F65356344A2 A67AF43447871581 E1DA115F0B8A9E16 38C2B67D266B4735 D78BD844D2F6BAD8 4123E22DDFAD9F16 2EA69EAF7D21ECF6 2BA151B22D9881D7 555E12EE22432D3D FF0395665AE6CA4D FF98DB9DFD647596 3CBB66E752A84820 1B7D8E5D1E75C2D2 CFC03DCF13979CB1 F735B4CECF3868F6 C01160793913604B 635C3BB27C913C01 AD07C2D54A10F20F 9D3FEECEA0569D62 EE8F5D25EB77AB64 3D8C56D89D0D3609 686F77B6C621A57F 61BEFC2F331AD1FE 5EE1A54050B54497 7E12778A45DF3B91 57338C7D251378EA AD5D5EA04B6E54FB C854D2BC7EFE9539 EEED9E352E872ADE 6F4C213389DBD9B5 5B991F1578C55069 294089D3B273292F B2385ECFE121FD35 9DC19F439B683122 F0944D6CE79BF09D 349CD1F0B24E7DEB 6E93B7339A067992 AB8290D990D14FCE D28A5776BE8BB5F8 96F76DC75BA226C5 9F94112E21B35277 AED2CA7A8F343262 3F1D634D47F9C05E A735C5DC007A0BBD F799F20D40429AAB C0A7DB1352AD0170 158C3E49FA69F491 93BB866963DC26B8 6056640F3E704C07 7385321585CC8BDF 0A9DEB4CED2FF704 9D45D75F4EFB9DCA 0A83F82D12650528 E9BC3C5ED9603249 ADA06CDED15E772E 61C7EFA41F5CF123 B3713E11F5E93B53 9D85C817B503B72B 31B9C11CE1A75907 02BFFD02BFF6655F 7933315495DD072F B5B94D322B62D0FA BEFA64D0C1C9D049 357722BEEBBC3F03 DAFFED9BD9F0F325 927CE1ECEE984176 BD53BE51228F0108 247CE8CBCFC7B4A0 5FD36A94C606EB24 B9F785D95CA41206 0BA3D08F1797AF75

Read the ciphertext. Strip whitespace: 3,344 hex characters = 1,672 bytes = 209 8-byte 3DES blocks.
Derive the key. Password = A858DE45F56D9BC9201303210100 (name+title). Key = MD5(password) = 1b71c90b45137c3daad2aaf203a93b42, used as a two-key 3DES key.
Decrypt. 3DES-EDE2 in ECB mode, then strip the PKCS7 padding. The plaintext is 52 GUIDs as hex (shown below).

Decrypted: GUID list

  1 b68add1c-632c-5f0d-aae9-76ce3029c6f6
  2 d58acf1f-e9dc-1941-afa0-6b8bc6fd8167
  3 0863673e-42ce-0ecb-a409-be2698dabd55
  4 cdefbcff-5d61-0e89-b12f-09726fdd1c8b
  5 300793a2-e987-6be3-9e4c-8420048ad5d8
  6 72332691-0953-00c6-b6cf-526135574a7d
  7 a1bac30c-d531-0121-b503-62519e3dc131
  8 2fba8d16-1cdb-51ae-a75e-6a2f8c7ea48c
  9 0cf4e3ba-a236-7d88-b08c-436da97d8820
 10 d47f892e-c95d-0bc4-8fb0-c4bd256878d8
 11 63733a5a-fa09-3139-9663-f915819053e0
 12 7f4bdfa1-a4b3-6b16-88d0-bf37faa601b8
 13 6cd8fa90-7311-6a02-a2d4-1376dbeeb55e
 14 74aeddbb-2a6c-71cf-9b14-7bee80d53374
 15 042fe9e3-3473-84cf-9d48-089f6a8b9506
 16 f545ab91-7f9e-3892-83de-8b71b765ccf3
 17 d69f40ac-7ff0-29c7-bf7c-105e4d8d0c83
 18 8703d6eb-991a-1037-bbe1-a7597c8785dc
 19 ec392e41-aa6b-88d2-a73f-719591d19a3b
 20 5369f577-bada-2818-8053-f8b8aab58098
 21 4a2a5565-5c55-1cee-bfcf-027b8621daf3
 22 bf7db0d5-3331-090a-9988-4dd201fe0756
 23 d3a2410a-d13c-844e-90ee-d92f88e76bc6
 24 d910d41b-7627-0680-a052-f64a59db8546
 25 965466bd-4a1a-251e-8193-99546ea7b971
 26 9da4280e-0ece-1e5d-8ff9-07fe0dbf769e
 27 56cc3f5c-736e-3053-9783-8c5d829f3cb9
 28 b52b7e69-e21e-5c87-8a92-b92c74c4b84a
 29 4240e2b7-0b4a-5d6b-baf6-dd666cdc54b1
 30 f9a47b86-328f-749f-aef5-4f19f81b5aec
 31 4892cc17-0df9-245c-bc2b-039cd77efd36
 32 7f87827b-a6cd-4709-a9d4-014ce2e524ed
 33 93284710-dd29-7e51-ac8c-d1aa86433bb6
 34 b999ac9a-f19f-70bb-ab23-e97e2e7d5ec4
 35 f5c98bfc-1bb5-54b7-80e5-8c621310b46b
 36 03072611-bf93-4e39-9d7d-40ea038342e4
 37 30091392-53c0-128c-9a90-74d612018b4e
 38 860f91db-dbd8-24cd-97b8-31ccbc96e010
 39 4901ae75-ee6f-80fe-99d5-45cbbcb87371
 40 430ec50f-4ca8-0be3-88e9-b6d62a550a6e
 41 7139d98a-ea49-5cd2-85cc-3c3022b3655f
 42 76816a09-41f5-8a84-8a4c-6d57f222ad9c
 43 d1d4db37-1716-3c23-a95a-d5f153e32072
 44 f912755e-b2f0-509a-bd58-d8f81eeb6856
 45 d64312ae-478e-2491-8d63-6ad8a7d09b56
 46 cbc54e5a-9be3-0b09-a759-1af4f21df077
 47 b41cccc7-9c6d-8416-9662-f648f24ac7b0
 48 dcb62cb7-ffa6-50ed-a734-1cb12ea9c605
 49 f7c0835f-2c40-49b6-997b-2d17f27d1060
 50 8baba397-26ce-0fe0-92e8-50b1ead5e0e6
 51 de8490b6-9521-86e0-a879-37e7c43d40cc
 52 87854817-29b5-6ae3-8e8e-fe997e21fe98

Explanation

Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 5100600570366783218210802135572477541280583520854086. Exactly this sequence comes out of new Random(710).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. Grouped in 1aorpo: range-8 piece (7 posts): undecided; candidate seeds 643,201,468 / 636,247,656 (Mar 13 Patch-Tuesday boot) / 542,563,171, 3 hits vs 1.25 expected
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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