A858DE45F56D9BC9 archive

201208170313 yd7jb

explained decrypted filler

3DES(name+title) ECB, 39 GUIDs, seed 739

Metadata

Post ID
yd7jb
Title
201208170313 → 2012-08-17 03:13 on A858's clock
Posted (UTC)
2012-08-17 07:13:28
Timezone
UTC−4 · title 03:13 against posted 07:13 UTC
Author
[deleted]
Account
A858DE45F56D9BC9 main account
Subreddit
r/A858DE45F56D9BC9 the main subreddit
Category
F3 filler: 3DES(name/title) → GUID list, seed known
Size
2,512 hex characters · 1,256 bytes
Cipher
3DES-EDE2 (two-key Triple DES), ECB, PKCS7
Key
MD5(A858DE45F56D9BC9201208170313) = 37726bf77de84794dfbaee9af32a4165 (name+title)
New here
Missing from the community archive; decrypted here for the first time. (new results)
GUIDs
39
Filler GUID seed
new Random(739).Next(9) ✓ verified
Run
Run 25 (seed 158,297,437) (seed)
Draw
5 · predicted N = 39 ✓
Machine boot
2012-08-15 10:14–10:24 (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: name+titlerun: seed

From the post to its content

As posted (encrypted)

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
  • Read the ciphertext. Strip whitespace: 2,512 hex characters = 1,256 bytes = 157 8-byte 3DES blocks.
  • Derive the key. Password = A858DE45F56D9BC9201208170313 (name+title). Key = MD5(password) = 37726bf77de84794dfbaee9af32a4165, used as a two-key 3DES key.
  • Decrypt. 3DES-EDE2 in ECB mode, then strip the PKCS7 padding. The plaintext is 39 GUIDs as hex (shown below).

Decrypted: GUID list

  1 f721ce69-b055-731d-a6af-27192b820cd9
  2 5980126a-51a3-576b-afdb-72a48f874590
  3 2ea7fb0f-9457-2397-a1a8-1ae1cbb71668
  4 9f407da0-f75c-25b6-a846-ddeed781cf33
  5 67373af3-9365-75ee-9422-7e61b1c451f9
  6 95267195-ecb1-32fe-8efa-825400cb98b7
  7 6b3781c5-f3a6-0543-bed4-6308332e384f
  8 f2634faf-1ca0-16c0-a148-2495fa57cefd
  9 923ad626-c976-3e85-809c-4d869c5aa663
 10 2125066b-a8fe-787e-a8ef-758f582d3638
 11 ae41e26e-e769-681a-9dfc-abbe42101cef
 12 52748013-26e9-30b8-9b11-0d2d8e150db5
 13 c334f8d2-7eb3-5600-ac1a-20f95e8c1318
 14 2ed837f7-6941-8b8f-8a03-48b148530557
 15 82bead20-3494-2e2f-aa6d-2d44b06fcf66
 16 28af2c69-f0ac-4763-8f14-3760b8cfc954
 17 9f9e498f-ed72-404f-997a-752d60c75cda
 18 9ab8a48f-52a5-1ff5-8fda-e7c457dab4f6
 19 6f0a1d74-51eb-6a41-b8aa-b299b443d4ab
 20 0c997bf1-1bbd-4d65-a08a-cfd4be386d29
 21 76dc749a-b6d9-00ff-844b-0c7da860bad7
 22 43a6ce7e-6774-1711-a044-02a0db71d3b9
 23 9a10e138-0f95-74d3-8233-6cd995005eef
 24 c82c4287-b0f3-18df-a536-63802bec9aae
 25 f82b219b-49b4-1dcd-a2dc-18f3dcb906fa
 26 8be4f40a-0b2b-7a32-a936-6ed48a1622ad
 27 8b290062-cdd3-2518-b13b-a9be75a82e7d
 28 a46b5e18-396e-5bb6-ab86-8ff9a6d56517
 29 1fa2580a-e117-6452-aedb-3e29977c048a
 30 5ab90985-6a5e-2101-adc4-df0867db2c64
 31 df5b79c8-4eb5-0a01-8fa0-3ae6af5864fa
 32 c67a3824-7e51-03cb-a7b0-ebee4017c0eb
 33 bfd751af-5d0e-494a-a966-7fd6db67ad00
 34 287ebb93-2e8b-441d-85c5-fcb68114359f
 35 8eb83825-0992-6d51-9c1f-e75f6128f7e4
 36 de1045bb-3905-71bb-b665-96f2c47e6dfe
 37 8514c7f9-dd25-124a-ac7a-2b6a62e241af
 38 a2a55a0c-7864-0801-bd12-4fd9be10986f
 39 39a5f534-f9ce-809a-8996-7909044a5c01

Explanation

  1. Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 752273013763582441640171172562004467108. Exactly this sequence comes out of new Random(739).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 5 of Run 25 (seed 158,297,437): new Random(158297437), Next(8,64) per post. The RNG predicts N = 39; the post has N = 39 ✓. The seed is the machine's uptime in ms when the app started (boot 2012-08-15 10:14–10:24).
  3. Conclusion. Filler. The content is fully explained by the two RNGs.

Related

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