201303292059 1b8i2u

explained decrypted filler

seed 608

Metadata

Post ID: 1b8i2u
Title: 201303292059 → 2013-03-29 20:59 on A858's clock
Posted (UTC): 2013-03-29 10:59:59
Timezone: UTC+10 · title 20:59 against posted 10:59 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(A858DE45F56D9BC9201303292059) = bcff97e9eb2f6969b6f7923fd205de8c (name+title)
GUIDs: 44
Filler GUID seed: new Random(608).Next(9) ✓ verified
Run: Run 43 (seed 120,022,078) (seed)
Draw: 64 · predicted N = 44 ✓
Machine boot: 2013-03-21 09:44–10:39 (seed = uptime at app start)
Sources: community-archive, arctic-shift · body from community-archive
Links: Reddit · Arctic Shift · JSON
Score · comments: 5 · 2
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: 2,832 hex characters = 1,416 bytes = 177 8-byte 3DES blocks.
Derive the key. Password = A858DE45F56D9BC9201303292059 (name+title). Key = MD5(password) = bcff97e9eb2f6969b6f7923fd205de8c, 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 f4e52d60-2127-30be-8ea3-744548c20652
  2 7176be04-257d-1062-9a65-8c38329e88f5
  3 f111b5d5-2829-6c29-b661-25c4e410778f
  4 1976e9cc-d551-2464-9fdd-4469227c5fbe
  5 fa45af10-fa65-68c4-a64d-dabcca4d7904
  6 f7927ea7-23ef-7785-bbcc-df3cfafc6d3d
  7 7e056ec9-c652-2b25-9ffd-12ac1be863af
  8 3c135197-78de-4f77-8bac-203b930c7d1f
  9 b069800f-6189-175f-aad1-cea1e259f164
 10 f17cc867-98e9-4ff6-b53d-9a001cf11e88
 11 60ba8eb4-33da-26e9-b193-cc9097ace751
 12 3d890e0f-e83f-159d-b620-e44feb6dd83d
 13 9d73f4db-b603-5ad4-be62-8d25233eef9a
 14 405efec1-0bc0-7a13-82a9-171e38399821
 15 86b156b1-bc09-5fd4-8e40-09f83b5e3523
 16 e046c41b-9af9-660e-941a-65f986ba7631
 17 63063700-72b4-31f7-b1bc-303761554489
 18 05e9740f-b019-8bff-b353-22e39c0daed2
 19 81c410d0-59a5-18f0-ba62-31916b843176
 20 6ecd1898-63c1-6083-9463-8ff89b148e33
 21 32fc2658-9a98-5b37-861b-03e9fe5e1563
 22 1ef66de0-aad6-0886-b483-d5005f518e00
 23 de2d45eb-ef7a-6d9a-9832-25459a444949
 24 be2d9d50-e959-37e0-a7cd-6d19e051e591
 25 e8951b5e-64c2-2d4b-946d-c94d5d095ccd
 26 f3ef570b-9cda-5f6f-96f4-580094eec43f
 27 225529e2-b11c-6228-a1b1-097dce318323
 28 629236e2-0225-379c-b213-62b7b7cc9434
 29 81e926db-7f0b-43eb-9651-a2fca69c2a56
 30 65db158c-4371-6027-94ec-e8c1ed9d44b2
 31 9d3ee3eb-fe63-5b9d-b298-f6e1b7b265e8
 32 4d8ebbc3-c5fd-54c0-ab05-0789fb6daec7
 33 cf1d5bac-d8a1-786f-b205-27a5c15d74fb
 34 0397860b-4250-2384-be10-97d111b7f10e
 35 c3e0d0d3-4840-84ba-981b-22ec71cc8afd
 36 6e7b5cb4-6019-11ae-842e-3e75cf13d6be
 37 19a997ba-50b2-69f4-ad4a-04d4d301d250
 38 a4111197-238a-61c4-a976-3820958a04c4
 39 bd33a4c6-99e1-4634-9393-9607e4c98146
 40 533013ba-82e3-1e38-9768-9c37fc68ab8f
 41 de37135f-f7f7-278c-8d2f-8fa8feb08696
 42 e8db88a1-f903-5008-a7bb-9a7ada648002
 43 3cc1eb1f-27c0-884b-859c-c7cc5f1e6764
 44 005b0d0d-ff43-086c-bce3-5115c2ea5d47

Explanation

Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 31626724142157563816506325634655728166412580. Exactly this sequence comes out of new Random(608).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.
Explain the count. This post is draw 64 of Run 43 (seed 120,022,078): new Random(120022078), 4·Next(8,16) 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 2013-03-21 09:44–10:39).
Conclusion. Filler. The content is fully explained by the two RNGs.

Metadata

From the post to its content

As posted (encrypted)

Decrypted: GUID list

Explanation

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