201302250144 196i1f

explained decrypted filler

seed 471

Metadata

Post ID: 196i1f
Title: 201302250144 → 2013-02-25 01:44 on A858's clock
Posted (UTC): 2013-02-25 06:44:59
Timezone: UTC−5 · title 01:44 against posted 06:44 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(A858DE45F56D9BC9201302250144) = 685aec6afcffa93589eff9b11774acc7 (name+title)
GUIDs: 44
Filler GUID seed: new Random(471).Next(9) ✓ verified
Run: Run 42 (seed 983,934,859) (seed)
Draw: 10 · 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: 1 · 0
Tags: automated (decryptable)2013Encrypted masked GUID listkey: name+titlerun: seed

From the post to its content

As posted (encrypted)

56D5FA4BE5543FEA 3C1E54D8E70E8428 DE5A9A16B1B11321 15A0E0298319BFEE E527AB5F48EA6573 1AC83B2D47F85810 D057C93F1C8D40DC 333D8E10FF7E6152 D6C1D1C1DE82EA29 C1B64884EEF91D3A 67BD79275936A0F6 7A85A51CE7E017C5 77D8AEFFFB1A4099 39DF210C8CDD0424 309597424C4D711D 569BC45AEFAD90EB 4B5D3B899A158577 A576406991D4A7A9 4E356CD51B1E57F0 B4F2F101191BD58B 68F3F0A4506D0EB2 B0A1DC28F56B28E0 38A29BC078260656 A2C91F129B2D78E6 C5211BEDDB1A9601 193577269166364D 49A0A8FC65D6EDB2 6C43439BF8A711AD 76C0C3426C7B9CF7 7BDF732969978380 FA6AEB7ECA7DD0F6 F421BA2035824966 350216A12F4C268D D89451A4D5C167B8 0BED0E1419C71023 5E8805A20F7B06AA A497C3EB8EE4629C EBA9D94E7EE7F7AD 9718E792A0BF6868 01BB5784AFD23725 8C33AF78EB9C7665 6A1ECFF02FEE0850 AD38446C3A77469F E522E0F5D6CCA79D 6295D06BCABEAA47 5182FC2F20AD951A 3E12769C3C82ADFF 47125C3E4FC4890B 9C658A017AA53A1F BE56A4C5B1690BD8 4C2364EBE1F60CB9 A4E7B27DD547D0F4 BAE07D3186C8C9D9 23C35FC9B93C0603 EB2F484733F56821 AA676914300B379B 458944E7C7B3C71F 0CC396D61F9D60EA 5141EBCF732133CC 4FBF43EDBA24E4B7 4F02ADB007C17C41 2F3CEEAC8E615C96 E73FCA082951B471 155B6CF5CB057360 AF88D20F3A888D9B 56ED5DC00AAC6F0F 60BD870A0F210C5D 04478FABC4569C4B 7A26709C0E865BAD 128EFB939F186586 73831117C38D4A28 58450AB58F5A4894 DEC354F482951AA3 E6096A9DE9B4F137 AAC95BE45EC6011A 83FB48F8F28AEAE6 2EA6D9C5F36C246A CADA421E30985956 D167B39D9A3246AC 9923224091ED2E4D 88155423640B09A1 53D60B4C0CB40346 05B5B899C4153FE9 B4DB6A7FC0DDAA56 3751B2765A09DD9F 87EECD45B4AACACC 508C82F201B6652A 95C35940D9B57315 03E494E99163A8FE ED3062DD3D3A1801 F3F72AE4F3F9C8E6 AB7F950E722DE58C 1296A8A03ACCF601 26CAD925008801BD 1502DF82058941C8 7E2AA635ACE5B281 2972A370BDEBEE6E 8AB33D95A9A471D6 9048234E4DCECEA8 250302AE5E79EF55 ED5879938D8D5127 F6F143132C43010A 81ACC37D2FEAEE15 BA5FF5EE2964EE84 70FCB8DEC064D285 09022131F931AED2 8D8AACFDFD81C002 DEA0ABF7D4F0DDB0 7D6F82FD962EA859 5AC6FC5E9E0CDAF4 21011A89A23FBE01 1D972C5DB555317D 1C685744109E984D EAE55C8C5EA46162 2E64C925C1E8AB8E F4978EACEF625925 BBDF75A3F008C7AF 5C7EE7F19497314F 7604E37AEACD755E 2ACA4C4DEA4D7656 52F9F87AE75B69CB 2AD0DD4436E9E733 26585C8BF7AF3ACF 05A15C8546E12998 624D047320BC6A54 2AB06F343395D4C7 401380152B2D0407 6B5B4EB95E67B25F EB75C774380BE5B2 EE78AABA18559157 06C5B08695931B18 790C9B8E0675F6D7 C5EB847AF060C25E 4C15A92B94EB5F43 7E6B17EFBF4F8B20 1F55B207BE92BD52 3CD0829B00FD6274 E187B7124F893A9D A260703295B9189C 7BECC2E66B21E937 69C26F876F63EE67 018E049274E69F67 7D19FF5C725E5C19 180B124ED8501551 023614EF295D5E0B 99E93ED8266BAA8B 22DF4AA8C23ED500 C27938CA2187A1C2 48714C0E138E8F2F 24410698016D7CC7 FA0FC8B61D058BA6 97643B988C0381CD 65E5CC0D1446E44F 728391A5A419291E 369EE40ABAE57793 CE4F2EF0DC63F0A6 0263A7A21BBEB820 C61FC9B25F83AA86 F3AC23746A0395A3 D84C33584166400A 6259D8F0940A9958 9E561D7B12CBEAB5 39009980F6ACBDF0 35D868A4EC0B4645 445B6FA2E8F6A1D0 4BEACB0D985C7844 8CBD34D866CC062A BADB232BAD0FA724 555E71ADE4464798 A3ED91875456C23D CE122BAE2760F92F F9DABE3BF3147E44 FA19047B121E9AE5 3C3C21910C15A1D9 49BCDFDD99CE80AF 7BD92B93BF37DD5D F06FB1216B86BCE4

Read the ciphertext. Strip whitespace: 2,832 hex characters = 1,416 bytes = 177 8-byte 3DES blocks.
Derive the key. Password = A858DE45F56D9BC9201302250144 (name+title). Key = MD5(password) = 685aec6afcffa93589eff9b11774acc7, 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 bd52c184-115b-7d19-9ffe-32e4567ac22b
  2 60460764-55d1-03e8-9b37-7bdb6c471bc3
  3 4a3da293-e955-8add-ab00-cabe5b81d0f8
  4 9b4afdac-4ba6-0311-9694-d65984d54f02
  5 51f15d76-dfa3-7d1b-b353-74f3ccb0fce8
  6 0b98dc86-46d7-1945-91da-7b61b3f3a02e
  7 79345eb9-05f7-8995-b7e1-6e474d7d6021
  8 53bed3dc-1ce7-62a1-a2ee-a8fe397a9e7d
  9 0af5b062-9e8b-27c1-9acd-eaf269d0efe1
 10 dc6a7823-4b64-8749-bf86-fcf263c68752
 11 fb082491-b21c-2f25-a6bc-282557ddf17a
 12 bb5a3619-44b6-1445-88c1-b2ec1a292915
 13 3628d737-3384-3bad-93d9-c0f7ba2b0205
 14 3d9e7010-4ab0-4aa9-b257-3110fd0d350b
 15 a1a825de-5950-6d1b-a2ab-1528db19e307
 16 d0af7296-e99c-1598-8f87-064f02b3705e
 17 8fb48d82-b0d0-7071-b031-2ff3a38bdbe6
 18 3a9040c4-50ae-0734-8f59-3af9303a8ef5
 19 9c366f48-8e26-33cc-a244-40557b8a86d1
 20 912f2147-1d54-618a-9b33-1d71cc644cb5
 21 c2cc661a-f8a0-3b43-91c5-4e1cefcc383a
 22 91b6acf1-3686-3332-ac9b-781928414031
 23 bdcca196-a023-580a-90fe-dc3d5fd8de22
 24 ff88e0bb-46ce-5810-b00e-8c9912d67c64
 25 46b2982a-42da-7fab-94fb-865650c8b083
 26 eb6b873a-b94b-4d7d-a605-f325c87fba4b
 27 b6428ead-94a8-75ae-8dd2-c34f1cff0b7e
 28 17a9dfee-0f46-4135-adc1-6a11c23c5f73
 29 35c4f25d-3a26-5d10-81e8-e743eb8bf97f
 30 6f562115-3984-3785-b492-5aeb1eb11cc1
 31 9038a3b3-2609-0c73-934e-f05ad67198ae
 32 450d9014-a4c2-4cf2-a77f-7d128cff10a1
 33 9baf8a34-c474-60a6-908c-a24c18e36f93
 34 fa12ed17-389a-7212-83bc-d809818c07da
 35 eac43744-0995-0ef6-aa32-b98cff71cf35
 36 11dd2da0-5b02-1733-aa1c-c9f30fc33867
 37 89a4903f-45aa-1fe6-9027-a0bad9e93921
 38 32d1e0a4-0fb4-3f43-b675-074c1efeb714
 39 f5411aac-e50a-03f7-b673-849e086cf8bb
 40 8f93e9ca-57b2-3292-adc2-213616c07b6d
 41 c16a9a8f-e8ff-06ed-8a4d-bc58c80c24cf
 42 b0a4d80d-2478-5a74-951a-f88f903f6724
 43 9acd9074-583b-5d71-975d-ea61f38846f5
 44 4fdd4fcc-9abc-54a4-8e92-4edf3819ad73

Explanation

Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 70807186282134617036335574745304670113030555. Exactly this sequence comes out of new Random(471).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 10 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).
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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