A858DE45F56D9BC9 archive

201309280714 1nb1q5

explained decrypted filler

seed 469

Metadata

Post ID
1nb1q5
Title
201309280714 → 2013-09-28 07:14 on A858's clock
Posted (UTC)
2013-09-28 11:14:56
Timezone
UTC−4 · title 07:14 against posted 11:14 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(A858DE45F56D9BC9201309280714) = bd1f085cb5570b424aadfde82b4ef7de (name+title)
GUIDs
44
Filler GUID seed
new Random(469).Next(9) ✓ verified
Run
Run 53 (seed 26,950,390) (seed)
Draw
141 · predicted N = 44 ✓
Machine boot
2013-09-12 09:30–10:30 (seed = uptime at app start)
Sources
community-archive, arctic-shift · body from community-archive
Links
Reddit · Arctic Shift · JSON
Score · comments
4 · 6
Tags
automated (decryptable)2013Encrypted masked GUID listkey: name+titlerun: seed

From the post to its content

As posted (encrypted)

9F625C7A56C44C98 CDAC9226B55FD3E7 D73A4741ECD8C3FB 6FA8B1B7A6FE94F2 C6FE21796BDF935B D66578F2ECDB3FF9 7C2023495B064E2A 099A6C2D9EC74113 8B589F4C0A399C20 D3E37B731550E0C1 0F4ADDD9B731CD8A 71FA927E47980723 253932018374103A 1616204D3B944812 293E8504AD0DB214 7187617C74B54F74 A1A353F658CF01A8 3F4712153E129667 564129296E150C9A D12C14CB951524E6 C553158C61CE0D8C B747001343B337C8 2EBCB6FDB027C623 617B61870CB57A59 BA56FEEE96A51E73 D93C057C1E60A15B 7C824624B814AEA6 62CF5386B6D559E4 B61605592A25C8DC 78113A3C40A2F7B2 5D7038EA8DB722D3 FBBFF3673736DFC0 F984D0E7BD3A6536 00E2A1C425021D36 FBD245825A67779E E393B5C8F9DC9300 B025CF869E13A459 1AF86B7C002BE36B 0401BC886017FA2B 54D2F4AFEEED538F 1EDEA32A49275471 56E53BC88BC6645C 26D27D0072401818 D6FD3B4A0542517B D118CB039816D228 D6BA3F89303735FD 9BA56E3A2F85CC94 42767DF151CE5B3E 70837FCDA0BF1F23 3D46E04135523BD9 A6F904A91C060D48 A9A2634B2284CF85 3A1B3C3FA4E06004 6B8E2539A78661AF 5E67747C1C66E613 9C2CA1A092E58BE0 9FDF2C8FDA8B2470 0F4464AF2C41A408 2563157C5ABAF74A 5F5321725E8AAAB8 E4C13B0AA238658E 1154E2C088A6F1E0 836BD86790EBEE53 3C907AFE92C3776C CF13E638BA5B2602 45A87B115D68E5CE FE88DB67F941F397 957734096629CFAC E6785ABF3B84CF29 41236B5040D4918E DCDE8F96510E2C3C 560756EA85CD7133 386C78C747E5AF18 116AE297B38A4D89 C8DEA8CD3B6E4DDD 8CD6DE0352AF35BD BDD0C578085D3187 5B2F4ADE0F3CA958 AE414E66538C5B4A 4DED3277624A066D 4D0138D7BEDE1EBE 9947B53D79E19EB4 05D24535F1B77894 DD6BA543E1B928CA 9FAB3F671F20F9C7 10BE780FE98362B9 E4865311820CDA06 29681722C7796066 076A047AA96F73B7 391D668DFCB53E59 5BD03F60BAA30EDE 3AA895BC8DC55F4C 93475B2EE61412FA 04FEC3DB5C216C8B 2BE66845F579E461 61509521A187ADC8 D5397552A6DF0111 771E1E53F3F6D45C 25EF5274B6D47B53 DA51D993BEBBD863 3C71407364B8BBD8 F2276F4181E89154 C2D2F2EF1BDEE9A9 AB1AD1AC29C4F612 38CA34E716F56C03 85837B581AFDF8E6 F68787F6C89F0ED0 79E0589A678B0165 69CC7288762D924E 12078509B1B10241 06335B984E98CF19 603A37A3AE52DB51 5E8ABB93F35A919E 3CA2E703B9C8B9B6 6E8645032A81A2D2 9B1366FDDC2A395B C406B32E2282F909 22E1A4F80EF4AF6F AC929B7FE3281A68 7086AB38F9A52F4D 56481FDBE2882627 87AC24B2EE2EB822 F89F1F93001181D7 678156D079113864 6FDE49F010C17FA4 EDA8B724430AE82C 83C91EC30420897E 86865EE177FDBD18 A1D2CAEFF60B0044 218CFCD7CEA17CD9 35D1AC9BD8DEB6C7 2E5DF1B91A81219A FD970971851EEE66 805051C9EC26121B 5409C1DBA0F43238 D39D6966F90C24C8 9563AF65C82B6D25 CA8C341A7BEF6D1E 77E01B346AC7C9A8 41AAAED131C470A7 119719E55E1A1C26 07E86CFD3075F714 D63082FA7A2553C3 FC1FAA538309E77B 9064C6FC76233A60 B44316877650C0C7 3B5EBDCB24DA0ED1 3F10CE2B3821E23E 2B9CD4ABDC70A2F6 F43C8F20C10C9750 8487CC2C831C35F5 A70108AAE50126E0 24CFB8AAEDE43FB5 BADC7B4D8A3C9E03 58F85C63B176A418 08533F9E02A20899 7F37ECF966F3AAE7 DD1EF4501D1F4DB9 A9AFBF5A2193890E B462E2FAA0D0E6FB BBD3A061979CDD2C 98B9F5D141EFE8DE 5E49CF5723322C44 BAC83E01D4D12BA4 A5DFFF6E126400A3 FDA75DF802AA3074 DD0241CF74893757 C9413B909A244985 848F00DBE67F02ED 918AF43EA2B8F0E5 68A990EB82D1BBEB 5DD0C92C62F1D6DD 79AAA2DCB9180624 30B4E1B537238D4C 3A5E452A87AC829A A4E2437147E6C0C0 CB7B5AE75F50EB25
  • Read the ciphertext. Strip whitespace: 2,832 hex characters = 1,416 bytes = 177 8-byte 3DES blocks.
  • Derive the key. Password = A858DE45F56D9BC9201309280714 (name+title). Key = MD5(password) = bd1f085cb5570b424aadfde82b4ef7de, 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 f990dd8f-67d3-6bc6-9155-2f4e01a64914
  2 e84f58dc-1733-3ddf-98a8-c7b2b01c6cbb
  3 bdcbbca2-77d6-55e0-810a-7f4133b25c97
  4 1009079f-dd8f-542b-a7dc-cb51efd9872e
  5 6e2ab226-0851-84d3-99db-5f7021e88e66
  6 4ff501e5-f4c6-3bd8-8c17-41cbb49d01a5
  7 23c7bb78-6727-003f-b427-84ac073239f2
  8 bd373fb4-7ebe-6212-82bc-a33245146c15
  9 53a2fe62-1964-09ec-bb36-da95561ac30f
 10 1de1ae83-bc1c-1eb9-ad25-1f65d4238132
 11 a4355f3b-4bc4-7c39-99e8-47ab9ad90386
 12 ea03ecae-6300-5f81-b937-552e184d9f52
 13 cd7e52f1-7ffe-0bfe-8fc8-7109de320d48
 14 78077576-5ceb-4096-ae72-7a5f985ad041
 15 8306dc10-286c-290a-930b-3f4c76063efb
 16 6752c58c-fb73-8979-84bb-a040a9db6ede
 17 89542bf4-2868-0798-b716-f749155fec48
 18 9238c812-0425-6bfe-8399-82991771ab60
 19 5eedbe32-42bc-329c-947f-a8e95940161a
 20 1aef7ce1-eb48-8121-8d58-6f5a9794e69b
 21 6af1f9f6-7f63-1828-8bda-03dbc92f7600
 22 850a9604-bf8a-8220-bd88-1c3368c98492
 23 7aa8d6e3-27e8-28bf-8973-3899bbdbe75f
 24 e1e63335-d632-7ff5-9fae-1e6e5abf895b
 25 201a272a-b06b-52ad-aeb6-5321e42a5462
 26 86634a14-4925-1f31-8afc-c69fb4f4b336
 27 690a328a-b002-1cbe-bc39-797b1ec996ca
 28 f6d2bb64-dc81-2886-8b55-58497a621db1
 29 7dec0aa1-bb0d-05a8-b7a8-b11f0bee3a6c
 30 275fb066-4d86-7767-a89c-dae348521186
 31 98887d21-9e6e-2a12-b3e0-a2241f2411dc
 32 c7b15160-560c-802b-a651-9b7fe9785bb2
 33 efdfa425-0c77-83ee-96f8-30bf9e64c080
 34 6b00a072-efda-69b2-8df8-0bbbb419e577
 35 2da2d537-9c65-33d0-9561-5625fd12c8ec
 36 ff6ad798-c04f-00dd-a5c4-83c27f1ae7e6
 37 46309bee-d44d-4e09-ad3c-426cb695a8eb
 38 446cfb64-5757-0bf3-87a4-44aa76c3a183
 39 7e7ee3d0-2151-5d91-9202-22915d63a87f
 40 7cb7e927-7fb6-2da6-a63c-ad208f1babd0
 41 7342d35b-3099-4ce5-8aa0-41f682b65821
 42 5fd0ef34-cbea-0ed3-9ff6-9a3314f4952c
 43 c7e0b58d-0a3c-4e7b-bb45-f196ba3064a6
 44 5e360d66-40c0-3598-99dc-5657886f7f9e

Explanation

  1. Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 63558306017504280638182751120728863040524043. Exactly this sequence comes out of new Random(469).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 141 of Run 53 (seed 26,950,390): new Random(26950390), 4·Next(1,12) 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 2013-09-12 09:30–10:30).
  3. Conclusion. Filler. The content is fully explained by the two RNGs.

Related

Findings: Mask digit · Count RNG & runs