201307280900 1j6t6i

explained decrypted filler

seed 807

Metadata

Post ID: 1j6t6i
Title: 201307280900 → 2013-07-28 09:00 on A858's clock
Posted (UTC): 2013-07-28 00:01:00
Timezone: UTC+9 · title 09:00 against posted 00:01 UTC
Author: [deleted]
Account: A858DE45F56D9BC9 main account
Subreddit: r/A858DE45F56D9BC9 the main subreddit
Category: F3 filler: 3DES(name/title) → GUID list, seed known
Size: 3,088 hex characters · 1,544 bytes
Cipher: 3DES-EDE2 (two-key Triple DES), ECB, PKCS7
Key: MD5(A858DE45F56D9BC9201307280900) = bd313cfed59bba840ac37574e34eed9d (name+title)
GUIDs: 48
Filler GUID seed: new Random(807).Next(9) ✓ verified
Run: Run 49 (seed 822,652,546) (seed)
Draw: 110 · predicted N = 48 ✓
Machine boot: 2013-07-10 11:27–11:29 (seed = uptime at app start)
Sources: community-archive, arctic-shift · body from community-archive
Links: Reddit · Arctic Shift · JSON
Score · comments: 2 · 0
Tags: automated (decryptable)2013Encrypted masked GUID listkey: name+titlerun: seed

From the post to its content

As posted (encrypted)

A7038330B9515DD2 5C6B2D32C0064913 E74BB839071878F5 EBADE73D37F566CF B2C915E5685E63D9 7705810E91947DED 60BBB3966B0BCA54 1353CFAFB4D5F76B F088065359A43EBB E2BB6A513E7CF21C 24E668F14060F79E D169672C22B11810 E658693C9F4DB92A 21D0002ABDB3AC18 02299EE4829AE5A3 8EEA4A6E0BB0D9E3 6FBEC4F07DF2B511 49C583AFBACA0A0E 9FF1055C817F2FE1 770F5F82E1AFCB4C 49137F0719F9EF83 0A6B7CD17432959F 28BFC290A73DC170 4A930B281BEA99C2 73E96BCAC89B42DA 09226F47B31A8994 20B08F8593A1ED80 E0172F976E0471F2 A58158D13294A400 6DF7F6EDAC1FEE25 52D2B15E317DBCB1 5A24D6CBFFB4372E E553D95F45D5B1BE 90D6C3E596488F76 1B69A5FB7A5E6AD0 D75F9A69AACDAB64 11FBD589A0C5188E D27BA9D98E37BD99 D60C56031A5B0303 28D6B3120F4EF4F0 F4B028A23235F776 24728C15DA9E365E 82E53A6D23C45FB6 BFBFE63D7644849C A35BE806066A853E F4C5F5DBBC678797 C9160A917E888FD7 22A99F47AA846704 F136471C4FDEBF17 85E227C1911BE20F 7E698C0FC693CFFF 65886D574E34884B EA78C1954C355FE9 8A30F59FF580C9C6 A8856E95756BE26F C24F486F95266A31 10E68B47D6B1AD75 9EB5AC07C54D73C3 C6B20ACDCE9E633A 14CBBD5AD27E4F84 37D8FEF640572FB0 8FA6FD491C2FCE68 B5CCA1110C73349C 2CE35EE91004CA0D 25627E363ADE5E29 119CB27140D4CE4B 25575738C8222A55 026EDC95E3C0709C FFB1F72CFDBB935B C3ABE2D1CAB9832F D100EC182F5F52BB F209B108EDAFFCA6 5C46167CEF54562E A51FA30E9340827D 2700AD3B219E5B54 6C86FDB89EE36F9A C8FFE61569C9D995 8DE4144110B21AE1 EA75D1A53CFB96BF 7356513D9E6BDF2B 1710DFF9087D1374 AA6D29B04D0B4A60 42B9D5525FB5D272 684555E1FEC4D4AA B091854302EC154A 5EFD191EA88434DE 385F7C37278DC879 5A590907C5A4F68E 855D8822F5D54ADD 5D2D60BF28641C7D 12ED48A01E2133EC EBE21469941AFA95 294728ACD5B13A34 AE0EF9E3C83F3C26 D0BE28F207F5399A A4190A32F6EA1CD9 788C6134AC95548B 40B5C67E7DC05C2E 971640F9CDA630A4 AB93BBAFBDA7218A E8BB4D9C604C73AF 4C0BAAB5EA04D48A 2975C73937FAB51F 8D910B4190D71CCF 29560A8B1F0BB13E 09DE1BAE14B047F7 5A160D5DAEA37B7E 4C0FA8F0EC565B34 255A5C9647806ADC F1C3A6975821BF78 C9BFB5CE15019784 05C5BA96E2F6209E 798D0FC867555230 97F950FC52AC5E1A BB8CF952B0EA5520 A76A328B203BA132 C45B7389E678D986 E431921328B61B07 4618BE6EEAA65767 3BF81AA7B30D2903 9735B3DFBBCFE3BD 451CB718F386CF40 BE58488D8BBB7E7B 046B56207A2A3FB7 7014B3FDB8034375 4E11B4044B0F67D6 58E986D60E8715A9 30CC0E29A6FAEBAA EAFDFFC6EA095269 4830E0AA5A8B2A85 C2DF1E30C71491E0 43219E36D1ADF668 8CA05426DAAEBCC8 9022FC832820634D 47509608911D2FCE 2556C5E68F510D54 27B896BDF389D3F0 CAD3DF85B1C017B3 6E9F4FC7ACE11E94 EFB65FB0C101CE22 FB41DEF457EB20EE AA6E1984A17D78D2 B0701DC4A92D88B7 1A79EC824C89A3D5 720ED422708E5AAE BC63C83452C63D0B 47E3BA193B6AD43F 8871256EAA4689D1 C64137FC926603FD A71777BAE72C32A9 A970FBB987403712 16D3D961102CF5BD B1AD5830672BC34F 592601FC4B78AC3C 2AC9A28ABCFBEFDA 5BB6747A56A698B5 FE4A7FCA6DE83E4D 996ADA7763DB9BCB D846A07BC68653BA 4E2E09E882EA15A3 EF62EA09FB6DE97D 9E45886B0D11D422 CBDE6564AF102372 B6D50923BF5A2052 9EF75C544B70EB4A 6A4F8167BF8459E4 BA507866CC9B0117 713A4898ED006370 8F63FAADD2C8B58C 34764CD6F8CEB378 97ADA13A5522A995 CEA0546A71D33419 9C5ED53FA2A45B2C D46BFF03C58F9B17 357F03A544E47E82 53158F81C9ACD5FD 4858082E70CB68D1 1A217E2A00973469 F9F102A52C96722F 484919C66370A832 B226D732BECAD5F8 E324B001617C9D14 E7AE0795759F3D99 2A8463394E99C3C8 D28CBA7F9F73D3B8 AEFCFE7AD2B88C5E 2128ED68DF88601A C98D8A61D6E86B26 37906AA2FE81B56D E5173276971906F4 07CCBBF16B927960 A6007F2F64DE6F9C B59BDAFAE1941BEF

Read the ciphertext. Strip whitespace: 3,088 hex characters = 1,544 bytes = 193 8-byte 3DES blocks.
Derive the key. Password = A858DE45F56D9BC9201307280900 (name+title). Key = MD5(password) = bd313cfed59bba840ac37574e34eed9d, used as a two-key 3DES key.
Decrypt. 3DES-EDE2 in ECB mode, then strip the PKCS7 padding. The plaintext is 48 GUIDs as hex (shown below).

Decrypted: GUID list

  1 1066e424-bb3c-2ccb-87b2-5aaac4532267
  2 12290799-bb1c-5658-bbf5-24439d619bfd
  3 69a5e4d2-832d-79b2-9ff4-07bb62e87c90
  4 1c68e920-f533-7c0a-a29b-0b0fc53797eb
  5 f52a2658-3823-40a6-965a-c975f24081c1
  6 15a7c914-5cca-7b1e-a7ee-081853abe512
  7 0ebc30d1-5a1e-4935-ad9e-231ea1c14649
  8 f81a5b58-f644-2154-8ff9-279ebfe35e4e
  9 91fef173-fafc-71b2-89d4-840b79d41965
 10 5323e291-a2dd-7090-9b5a-5f7ef0bdd0b7
 11 d55d4e47-e6f4-7bbf-bf73-54db6a7dd5b8
 12 c23fc083-6fe2-4395-99d0-709c8dd78f07
 13 5c54c1fe-6093-3f63-afb9-65ccd1b5779a
 14 516345e5-7cf4-2f41-8bdf-fc41b44936ff
 15 efad0b38-1c77-76ad-8ff5-180577125987
 16 370c8e48-d009-0297-aa2e-da9657d517f5
 17 81045b65-d885-0040-b9e9-2add16e9c55d
 18 b5ccda02-ad9d-3b58-aabd-a03b23fee711
 19 7da0fd5a-e80e-47f2-95bb-61f312ae094f
 20 601ae512-2187-7cf9-b17c-33d13d34e9d1
 21 8d8b927a-4e93-045f-a376-4a0b76e39c13
 22 8dd4a506-63e8-7aa4-9d82-bf7e2fb1d7c5
 23 37436a99-8d07-3cea-8b39-ccf0e9a3e4d1
 24 be4bc75e-dfb8-8b69-ab1c-7ed118cfbed7
 25 1630b228-80d0-7704-bebc-144c7959a1ae
 26 ed8bd62f-ad3e-580b-b5c5-18c50c42df89
 27 a3bb1af0-e285-64d5-90d6-7b7986665257
 28 ea814a6b-fb0b-6a11-8bc1-ef78898490cd
 29 9b07a4a3-c6d8-4555-abd3-528023f2f8a5
 30 71457694-96c9-05f2-a29d-6d4bddf223a9
 31 ba4fae63-d298-1d3a-a924-b9bf0d0fea69
 32 f0ce8872-40bc-030a-a663-599bda3ac2c9
 33 08025f8d-f79a-72e2-8366-55f0acf4a174
 34 5d5aa266-f140-15e8-a8ce-432d593b3f0c
 35 152fb12a-c853-37c6-9d68-b959cddaae5b
 36 0cf69537-270a-6732-a595-4a65088d23b8
 37 27aaff8d-6178-4c3c-816a-3e5f34187776
 38 0b58721a-4166-3243-967b-fbe81e83ce14
 39 6c4e7ba0-806d-4713-9d3e-a5153851e95d
 40 483720ae-ea75-17d3-b2a3-ccb58f05e8a8
 41 887bba1e-37dd-0b8d-9fc0-b90e0b577ca9
 42 25f84ca1-143e-890f-a0b9-99195de22d4c
 43 df4442c6-d8fc-74fc-a34f-df972c68c3cf
 44 acb25899-780a-570b-9c7a-def7c0dd36e1
 45 abc2ab8e-2ebf-351c-813d-2eef1e99ec15
 46 89a24ffb-7e71-4425-be32-f4109bb6090c
 47 e37b6ec8-07dc-8e37-a01a-a3dd68296827
 48 1020690c-109a-070e-9ec4-e464e969e00d

Explanation

Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 257747427774327003470738756640107136434108753480. Exactly this sequence comes out of new Random(807).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 110 of Run 49 (seed 822,652,546): new Random(822652546), 4·Next(8,16) per post. The RNG predicts N = 48; the post has N = 48 ✓. The seed is the machine's uptime in ms when the app started (boot 2013-07-10 11:27–11:29).
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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