A858DE45F56D9BC9 archive

201302250926 196y00

explained decrypted filler

seed 73

Metadata

Post ID
196y00
Title
201302250926 → 2013-02-25 09:26 on A858's clock
Posted (UTC)
2013-02-25 14:26:59
Timezone
UTC−5 · title 09:26 against posted 14:26 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(A858DE45F56D9BC9201302250926) = 7d60a384c3db6905aaf4fb8b11c4eb11 (name+title)
GUIDs
44
Filler GUID seed
new Random(73).Next(9) ✓ verified
Run
Run 42 (seed 983,934,859) (seed)
Draw
17 · predicted N = 44 ✓
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
3 · 0
Tags
automated (decryptable)2013Encrypted masked GUID listkey: name+titlerun: seed

From the post to its content

As posted (encrypted)

7E482B048DE20AF2 EEC52CFA4E2F17AF 5CF35DC62CAE5635 0881CC368AB5DEA0 709EDDD75708F067 034FE0511AF69780 C34C6F3A06C76140 564AB0444FCF9ADF EFE471DF46F2AAFA E435DD28E44ABD30 2E5C9438594EED9C FC9656A93D42804D E1E4BA6B38A12C62 1592CA137EE2CDFF F5A344E3A359DBF2 55BB9877560C893B 2E2F77836945FCDF 47F2F0205207AAC8 8DEAEF57C52257D7 F6072A92BEF94582 EEC3D5A48AC93F18 6FEF9F9277705292 6AD139592A35C421 1BE7E7E905DD499E 86D3F0C175B72BF5 2DDB59C41B1A9197 6F67D2F86482256A F11CFE11231226FD 8047C8AC562AB4C6 EB36BBF6A40D89C8 644B8734603642E4 A4DD10CC94F5812A 516670BB688D30B0 5297827F3199303B 03D8965EBD6B6DD9 4D8F3CFAFF6D5C9B DF7CC739DDCA3EA3 72A96F0648B11452 D13D8607B0B709AB 5A52EB65A8E896DA 7DBA39C10C333CBD 3EF9EFA5AFA23B58 75C50AB5B1AFEBC0 79A49B4E41D20176 09FCFFF3CC90319F 205F639A834790F6 4B6EC874C63FA39F EE3DB1187120D586 2BB0DCA9F17B551D D428EFF97E3839E0 EA829B919F6D801E 3FC7FCDFFF97C98D 7A2191B14EFEBD37 3D6B9A6294DB6D9E BB7F01B1B658E299 54D78BEA79823DCB 8B2DF11FB8A3ADE3 B4C4D8BD0A3AEF52 1A80684EA0F1714D E8AA721EFE27810F C2C899B01F63FBA1 FD72DC29DE77C5FC B0D1120A7EE6404B CC50433EC7B6CC27 FAA9900D1D0316A0 D5E63BDE791F93CE 721AA8AA4442564E 26876B02BE4462C9 3FDA1C2627838EBA F3A64FFEDA6128B8 D02216866037AFC9 D9379B126F78BA20 F3198F95CD0AB3B1 76461CEBC8FDD6C4 AA5A8D79A02C3332 74A6E88E503DD8FB BE1110D67A8AB719 1F7225D5B9D27859 51AA181DC2CBB874 6CA0A841B5345996 E302A5A20D39CAFE 4F6F2F5581257581 C11F9ED4E2D13A52 537F108F26869FF7 32C4A026F1FAD7EE D7DE28F4843D8439 CCAFF5E5FFAF1F83 9CBDE565CEA66EF6 C953C0C01E8636A8 75B576ACD8EC28C1 B5DE9E692D399B9F B086D7119C95E0B5 C8F9772CB20D1EE1 6213FFA54C5B8BF0 E6FBDF8439842A0E 699A10ADD51B842D F02D7D64017E0327 3BA2F3196BFB892D 3F0DA04B8B5AA8B8 3A0DB893A44E57C6 4C22BFDE7724C877 6DA220A6B9410929 CA28229BBB38FAEA 3557C2B63D31CF9B DF9DF9B268FE2EE9 1913F2617ED8F94F 2AC5B665ADE24D93 6B5E1D5B4CCA1EA9 551F3D7B80B95C62 FE87C40446C02484 4164B3E13C283E3B A32A91A96B3DC6C7 1938881AC2C0383A FF17949A72B357F5 3444B374E141D8B7 D9F0AAEA21598AFE F0762B2C34F4CBB3 24805DC4265AAD99 BFCA3974FAF88C35 54B6C356CBA131D3 64C5538CD94C17BB B5F85A6617603F48 FC9DD8D58D4BE758 E072C7721BEB72B0 A6F7DB289AF5C3D1 76945B080FFC62D2 E7ABA14192976CDD 39CC631F2435594C FCF6F1CE2ACF8016 D3B5A766A7C51605 4A37B0A7EA03061A D3DC02B50EEC1968 68A2FA472A32377A B74C58B8BAC12194 A69FBCC4D41440B7 251CDE987EEA7AB8 1021357B2ED189C3 E8AC5F18953F8694 769763F7385CB20F C8E0A71CBCC2984F 0F23D2A7667F346E 52F4673D32A9DE9C B8BAFDC032995105 AAB1CB5E7195AFB1 FFE3E811515F9D31 D2DF82348DDB0758 BF6A76DC9AB17927 0BDA941D72F2D893 2DF315E4ECF56022 E882DF9374906410 1BDA0AAD29D1E5B9 FD3982B3A2B042D4 A6CAAC2E39C8EA52 F70EFEBFD9A1C088 5658BCB1B7F8E4C9 BDEA54C83CD3F78C 00453FB274B9BD94 694B344E0FD59729 0D74827C98A90C3D E574B275610379AC 376E0C93F8B0AE8C 85EF58E8315682A5 809E512B6B08A4CE DE0BC19B35F5BFBA 377A80F40C667EAE 9D6B16EDCB41E1EC 18241942BAEF1E08 3C6A75DA8AAA2B28 EF93D61B04A31A72 49373AF316C2DBB9 1557B667AB0EAC74 7821D20A3E09A794 9D238E3A0FB9B4CB 3188E71775D3724C 54A1B054DCD7C13F B8BB685135096D61 9DD6B93B46A9BB9C
  • Read the ciphertext. Strip whitespace: 2,832 hex characters = 1,416 bytes = 177 8-byte 3DES blocks.
  • Derive the key. Password = A858DE45F56D9BC9201302250926 (name+title). Key = MD5(password) = 7d60a384c3db6905aaf4fb8b11c4eb11, 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 b6adf82e-963e-7437-a2df-c14fc1caae7b
  2 47713292-bdce-2537-ab2b-0bebbcad0823
  3 9611f0f1-3c0c-73f8-9aa6-f586be195599
  4 ced7bb7a-aade-1d0a-8468-07ae80eb0126
  5 3736d522-bf71-193b-b71a-e6e0811c826c
  6 f4a1a8fe-cbcb-3061-927b-b63d3ea3f218
  7 882b3565-eeb4-55ae-a9a3-87418a6078e4
  8 24c04150-21e5-06be-92c6-432b22ea5a1d
  9 ba3f6265-f4c5-022c-92bf-f18e3541eaac
 10 572ab369-4514-1657-a7ad-f11c8a00a4ac
 11 03b1ea3a-b75d-0be0-8986-31f345403548
 12 e0c04f64-cafb-472e-957c-cccdd8c04e2d
 13 82b8b1a7-467a-7325-bf9b-5d74727db31c
 14 5f9274ba-a7cd-4241-bc6f-bfbdcd40b0e5
 15 21634f47-e082-0ff9-ab28-c5ee1ecdeca4
 16 67f39f8c-a552-59c2-91aa-3a6f97d66d5c
 17 e040e1b5-1d23-42cb-951b-c86e6708a6c0
 18 c251ddf5-01a9-2165-9ee3-cc51ec285003
 19 65de25ea-d3d9-5d32-94aa-379edabd2f26
 20 1cc4dd01-2e34-5ed9-b300-9d957ac89f48
 21 85b8f919-7d7c-457a-924c-500266fdf9a1
 22 a91d9984-b9bc-603e-bb12-87e8167a9b67
 23 180f9fc9-0dbc-2f5b-a567-cc7b3253cd9b
 24 356f12ac-fada-4ce4-956f-a458db2b8315
 25 fbd7ee8f-b47a-7785-abdf-5c753bb3127a
 26 b5f1f77f-04ab-460b-bc2c-dfcabec34296
 27 bb4f5a76-63a7-6ccb-809b-f53d97eefb5c
 28 7cba6cb7-21c6-86ff-973e-89bd875bfe29
 29 01478aba-70bf-6726-97cb-eac78657c792
 30 b618e79b-81e6-7b0c-b645-2bba4ca08a6b
 31 ba7e4bce-c065-1387-a400-4ae86127632b
 32 6f1bb346-be3d-6a84-8453-53977e6191ee
 33 dbd7ba89-5fc6-5f6f-aa6e-32d079249a79
 34 691fa2c8-6b2a-759c-8fe9-bd4645ca8656
 35 769d9b4a-2184-1e63-b899-c4a02ccd4be9
 36 400813b5-74b2-8d86-9551-d4c1b5360922
 37 d162e3d0-cada-4d33-b8de-87025fdb5426
 38 69931455-8907-14a9-8115-23bce7772b2f
 39 313dbeae-a86e-7f67-838f-58ca530e0b61
 40 095debda-3204-3692-8387-446dfd2a1719
 41 a8371fc8-1dc0-490a-a58a-fb0724995a63
 42 857b2e60-0336-8fcc-9dd2-0007c7fd403b
 43 9f3e9155-c252-7c74-9609-00e0205bde3f
 44 1d46d66a-8cec-4345-b27a-ec9c290450ab

Explanation

  1. Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 72711350010474054255462474686716571841734874. Exactly this sequence comes out of new Random(73).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 17 of Run 42 (seed 983,934,859): new Random(983934859), 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 2013-02-13 10:26–11:32).
  3. Conclusion. Filler. The content is fully explained by the two RNGs.

Related

Findings: Mask digit · Count RNG & runs