A858DE45F56D9BC9 archive

201209062130 zgu16

explained decrypted filler

seed 211

Metadata

Post ID
zgu16
Title
201209062130 → 2012-09-06 21:30 on A858's clock
Posted (UTC)
2012-09-06 20:30:02
Timezone
UTC+1 · title 21:30 against posted 20:30 UTC
Author
[deleted]
Account
A858DE45F56D9BC9 main account
Subreddit
r/A858DE45F56D9BC9 the main subreddit
Category
F3 filler: 3DES(name/title) → GUID list, seed known
Size
2,704 hex characters · 1,352 bytes
Cipher
3DES-EDE2 (two-key Triple DES), ECB, PKCS7
Key
MD5(A858DE45F56D9BC9201209062130) = c23cea47f4de528774b5d654e15d0c7b (name+title)
GUIDs
42
Filler GUID seed
new Random(211).Next(9) ✓ verified
Run
Run 30 (seed 1,932,335,625) (seed)
Draw
1 · predicted N = 42 ✓
Machine boot
2012-08-15 09:44–10:44 (seed = uptime at app start)
Sources
community-archive, arctic-shift · body from community-archive
Links
Reddit · Arctic Shift · JSON
Score · comments
9 · 0
Tags
automated (decryptable)2012Encrypted masked GUID listkey: name+titlerun: seed

From the post to its content

As posted (encrypted)

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
  • Read the ciphertext. Strip whitespace: 2,704 hex characters = 1,352 bytes = 169 8-byte 3DES blocks.
  • Derive the key. Password = A858DE45F56D9BC9201209062130 (name+title). Key = MD5(password) = c23cea47f4de528774b5d654e15d0c7b, used as a two-key 3DES key.
  • Decrypt. 3DES-EDE2 in ECB mode, then strip the PKCS7 padding. The plaintext is 42 GUIDs as hex (shown below).

Decrypted: GUID list

  1 c953a975-7851-80d5-a276-f7928347b991
  2 e81b06d4-cd0f-654f-81ce-01d2248fb34d
  3 e2b33583-11fb-283a-bd24-d8caab270120
  4 6537ad13-d39c-5a0d-b4a5-f194e6ebef5e
  5 fa6864a1-6d01-4d79-aa5a-45c884e3a490
  6 206181c1-1c09-8d21-978d-8d810ccf3025
  7 1ddf526b-8d30-44aa-96bb-410af559f8df
  8 3e3bcf2a-831c-2949-bb73-64f9acff4f04
  9 9577bdcc-0c7c-0498-a065-72617db34684
 10 a50ecb46-257e-01de-bf4c-5ae36122ab09
 11 f0d9efae-3568-63e2-860c-26202a3e9fd3
 12 00964466-7236-1430-bb8b-294fe5bea5aa
 13 ce50f4ca-3748-6f93-8987-8f2eb7e844a8
 14 988fc882-6304-280c-81c7-9c446da8db18
 15 c8df96f4-afd0-69c6-82e2-259d8bc354cc
 16 7024b179-5ec5-7855-850f-8aa842cce778
 17 09805f21-9cf7-53c9-ac67-c2137a47fa11
 18 6064243f-3821-7c57-b39f-286e59ba8aed
 19 33d21804-637d-368e-97e7-74602ed615e4
 20 990ee263-818f-03d9-9971-ce5ce1bdab06
 21 bddf4d45-a891-7f45-9bcc-0cbc266cdafc
 22 7430848d-4b16-5911-9eae-4eccbc6a01d3
 23 91d5df6e-8684-53de-9084-8c07a34d3fd5
 24 32e1ca2d-1808-6713-889b-106b62135f6e
 25 ddcd7126-3966-34fb-aba6-a699cb67a6b9
 26 733e4ea6-5ca0-20a2-954b-b84df913557b
 27 7293bfd7-306d-3efe-8431-8aae47668dd4
 28 6bbc66fd-b497-3710-b2dd-f822387f81c0
 29 5633ba49-f893-7d99-a413-4f1b5930f8ba
 30 0aa5c28c-08b3-0fc7-9477-844697c12ba3
 31 1f675021-1b74-033a-a01a-dd445b797b76
 32 29c60470-4838-0257-931f-d029d4693dc2
 33 90ce6ac3-c9da-10d1-a98f-92d2398c82db
 34 408804db-6159-2d9d-997c-308fe75270c8
 35 d5680e4e-eab5-2c6a-99ef-3e390a5e71d3
 36 78f424cc-483a-83a9-8eac-5a3515816ef7
 37 0ed58402-b9ea-7891-8144-fb2c4ad57fa1
 38 d6b0d3a3-0f16-12fd-9453-b17a2740ec1d
 39 b7a43284-60af-44b9-9718-8565f54e8330
 40 131aa1bb-6c6f-66d4-9017-cfaf95042e2a
 41 b699ac4a-c0fe-446d-8135-00321f9b1b80
 42 ee5dd943-3d80-337b-8457-8ede06e90ed9

Explanation

  1. Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 862548420061626757307556323370001228714643. Exactly this sequence comes out of new Random(211).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 1 of Run 30 (seed 1,932,335,625): new Random(1932335625), Next(8,64) per post. The RNG predicts N = 42; the post has N = 42 ✓. The seed is the machine's uptime in ms when the app started (boot 2012-08-15 09:44–10:44).
  3. Conclusion. Filler. The content is fully explained by the two RNGs.

Related

Findings: Mask digit · Count RNG & runs