A858DE45F56D9BC9 archive

201206290024 vsb5c

explained decrypted filler

3DES(name) ECB, 40 GUIDs, seed 676

Metadata

Post ID
vsb5c
Title
201206290024 → 2012-06-29 00:24 on A858's clock
Posted (UTC)
2012-06-29 07:22:59
Timezone
UTC−7 · title 00:24 against posted 07:22 UTC
Author
[deleted]
Account
A858DE45F56D9BC9 main account
Subreddit
r/A858DE45F56D9BC9 the main subreddit
Category
F3 filler: 3DES(name/title) → GUID list, seed known
Size
2,576 hex characters · 1,288 bytes
Cipher
3DES-EDE2 (two-key Triple DES), ECB, PKCS7
Key
MD5(A858DE45F56D9BC9) = 34a14a42e98ff96095af56604e290cae (name)
New here
Missing from the community archive; decrypted here for the first time. (new results)
GUIDs
40
Filler GUID seed
new Random(676).Next(9) ✓ verified
Run
Run 9 (seed 449,725,219) (seed)
Draw
14 · predicted N = 40 ✓
Machine boot
F 2012-05-15 19:12–19:12 (seed = uptime at app start)
Sources
arctic-shift · body from arctic-shift
Links
Reddit · Arctic Shift · JSON
Score · comments
0 · 0
Tags
automated (decryptable)2012Encrypted masked GUID listarctic-onlykey: namerun: seed

From the post to its content

As posted (encrypted)

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
  • Read the ciphertext. Strip whitespace: 2,576 hex characters = 1,288 bytes = 161 8-byte 3DES blocks.
  • Derive the key. Password = A858DE45F56D9BC9 (name). Key = MD5(password) = 34a14a42e98ff96095af56604e290cae, used as a two-key 3DES key.
  • Decrypt. 3DES-EDE2 in ECB mode, then strip the PKCS7 padding. The plaintext is 40 GUIDs as hex (shown below).

Decrypted: GUID list

  1 ed782bc5-7ccc-7514-902f-07162fa1e76f
  2 f97df37a-b30e-10c3-9d26-f1ce834f2a6a
  3 09ff0f69-ca89-2f6d-885c-64c6a2d42a56
  4 c08fe9bd-ea93-7905-9d69-de646d9ca7ec
  5 cd4c551a-2b25-3794-a9cc-93df9c5549ac
  6 9d5e125c-6473-231d-905c-f0efe7763019
  7 e8b9d916-1000-7d07-8a5e-cedd4f202524
  8 ad0c3fbe-a88e-5927-844d-dd94ee6ae8e4
  9 f3de6e10-23a2-58b0-a0f4-f3ade41dbdbd
 10 4f061e9d-11ba-409e-8842-b92757b955ac
 11 182d1b46-dfbc-2206-b8cc-d90679f12918
 12 fcdc732a-1e62-2dca-b326-ae35479dccbf
 13 6d6592a1-3742-398c-b2ae-8c028e76f423
 14 9c7cf1fe-f6e8-1919-96f7-1a5dba3a8fd3
 15 8d74923b-481f-1f2b-baa2-f6ef07d31ae8
 16 c9f18dc9-9c56-1699-b068-f43e5c437645
 17 02ef2b00-6d9d-0d77-901c-c1fb2cf3cade
 18 e15c9e62-8423-1c49-b9ee-b68b2c41c777
 19 1a96fcb8-587f-8b02-8dfc-efe8c16853bf
 20 1844518b-513a-0976-aac2-15240dd23c1d
 21 abd91fa8-2906-53f3-9112-e1c6e0355a13
 22 f1ca4a22-4699-6bbb-bf18-e1d1b722efe9
 23 b67bc63f-08b9-260c-b802-236ba1b73bac
 24 a2fd7f48-368b-13a3-ac28-7b452bf26a27
 25 9ea63c5a-28f1-84ba-9975-702831a214ba
 26 ccf1462f-9d72-2f70-a134-823aa9e39916
 27 42a3f9e5-01c3-1b45-91b7-8fd31ede4cd2
 28 4df3fad0-36c4-4478-8921-feb3a9445cfb
 29 c6d7ad0f-1b42-2b35-8307-6cebb76ea9e2
 30 7357086c-3230-463a-90dd-61775eff2eaa
 31 a7d6be93-b63d-6bfe-af74-1fa673abe621
 32 02a480cd-c3f9-4e7b-a4b8-ef51dcc720bf
 33 60a3e4b5-34b4-1e44-b9b7-314b8e1959a6
 34 e5690907-2c6c-8fb5-b2ae-52d0987472e9
 35 5993997e-a674-6249-9f78-962219efccbf
 36 18d1ea42-d0f1-03d7-b5e4-85dc2ec99da3
 37 eb482b6f-f082-8d57-8726-cb4443208d57
 38 915e2416-a414-0486-87fa-534d56ec7aef
 39 3e79c3ff-6a95-0f9e-bdef-2ee203b917ca
 40 0091c2ea-18ed-7ab6-bbf3-2a7be9efb738

Explanation

  1. Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 7127327554223111018056218214246418608007. Exactly this sequence comes out of new Random(676).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 14 of Run 9 (seed 449,725,219): new Random(449725219), Next(8,64) per post. The RNG predicts N = 40; the post has N = 40 ✓. The seed is the machine's uptime in ms when the app started (boot F 2012-05-15 19:12–19:12).
  3. Conclusion. Filler. The content is fully explained by the two RNGs.

Related

Findings: Mask digit · Count RNG & runs · New results