A858DE45F56D9BC9 archive

201302280432 19e08m

explained decrypted filler

seed 270

Metadata

Post ID
19e08m
Title
201302280432 → 2013-02-28 04:32 on A858's clock
Posted (UTC)
2013-02-28 09:32:56
Timezone
UTC−5 · title 04:32 against posted 09:32 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(A858DE45F56D9BC9201302280432) = dc0d357f9bc143bc4f64c80dad5ae2dd (name+title)
GUIDs
40
Filler GUID seed
new Random(270).Next(9) ✓ verified
Run
Run 42 (seed 983,934,859) (seed)
Draw
78 · predicted N = 40 ✓
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)

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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 = A858DE45F56D9BC9201302280432 (name+title). Key = MD5(password) = dc0d357f9bc143bc4f64c80dad5ae2dd, 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 a2560a9e-e0a3-7c96-a5ac-e468d0c2e5eb
  2 5f909273-2ec7-078e-91c3-5233275dd3aa
  3 ded4927e-3479-469e-907e-6546eeec7939
  4 a88737de-cf93-173e-bfb4-739b8c58af4d
  5 8d0a4d21-6365-076a-aaea-6048b7b6f87f
  6 9b9a3f14-862e-45bc-aaef-22ee9fd0de39
  7 b0405eca-6767-7314-bb47-3ecca6a41977
  8 c0dca55c-0209-8f85-a4a5-f3b4bb8f11fd
  9 e849580f-3379-3b91-9e09-ee621b641e38
 10 abb38c8f-e0fa-7017-8b7e-b55daa832491
 11 202219d2-5508-1e7f-a7be-dafbd075e85b
 12 1de5fba4-11c2-26f0-ac0f-4ed8e7122473
 13 6f3fea0e-1307-2a50-aed3-7e5d82a68634
 14 5a0b11e8-61d3-8f39-b702-e93b9b569a31
 15 a7f84f2c-c342-8b1c-857b-e37848ba03c4
 16 2b6a95ee-6c8c-5636-b25a-a3fddc395919
 17 7c9cb33a-d98a-3687-8f3c-bc7a9bce59b9
 18 4b1b7cdd-2843-3ef7-b782-8a608e2c246d
 19 d6854f6e-d72c-8002-bcef-1e9e4802e44d
 20 b5ff67ac-e546-7719-a82c-76e1fcd9c49c
 21 63a028a3-883d-6669-b49b-4a537cff5be4
 22 3089acf1-232b-024c-8db7-1d3719341091
 23 a49cdcdd-daf5-5351-a15a-5f00f53bb967
 24 888b6b9b-30d0-3c98-ac09-ae61ca7e8d75
 25 b5c461de-34e8-1a90-a5c1-dae2d4441e44
 26 e27c46f8-891d-1dc4-a292-18d9a0412497
 27 0d0506cd-399e-0ffb-be76-4b068ee1de32
 28 c98bd253-ad3a-8f3a-b7ea-5d96bde4357a
 29 d5b788b2-366c-16fe-a803-ab578cdbfe33
 30 da536626-b524-4773-b548-dc64c7a49674
 31 177e752a-177e-7cf7-9dfc-6ca80cae0e34
 32 e7810421-d348-5254-b1a6-3c73496d8a52
 33 441f5e30-318b-7545-99e2-d1df91ced2be
 34 40cfa05c-bf6a-61a5-a5eb-c3d6733aca89
 35 e4c4532c-890b-8e0b-8bb7-8ea5aea0d975
 36 6f443d79-d908-46d6-b5fc-902708c30d2a
 37 a469f302-b110-6967-8e06-61ce10596d86
 38 3d66c01f-7875-389b-89d9-a7eff3961221
 39 bd08ea19-e151-54b0-841d-7cd16e63296f
 40 28a4a5d7-a6ce-2d73-9c63-79fad5c9d51b

Explanation

  1. Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 7041047837122885338760531108147576846352. Exactly this sequence comes out of new Random(270).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 78 of Run 42 (seed 983,934,859): new Random(983934859), 4·Next(8,16) 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 2013-02-13 10:26–11:32).
  3. Conclusion. Filler. The content is fully explained by the two RNGs.

Related

Findings: Mask digit · Count RNG & runs