A858DE45F56D9BC9 archive

201302261826 19agul

explained decrypted filler

seed 764

Metadata

Post ID
19agul
Title
201302261826 → 2013-02-26 18:26 on A858's clock
Posted (UTC)
2013-02-26 23:26:58
Timezone
UTC−5 · title 18:26 against posted 23:26 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(A858DE45F56D9BC9201302261826) = 458343ba95d69661e3d35144232d5437 (name+title)
GUIDs
44
Filler GUID seed
new Random(764).Next(9) ✓ verified
Run
Run 42 (seed 983,934,859) (seed)
Draw
47 · 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
1 · 0
Tags
automated (decryptable)2013Encrypted masked GUID listkey: name+titlerun: seed

From the post to its content

As posted (encrypted)

8D0B98C01EB911DD EF4D4E6FABA34088 5191D95C81935B52 457618D3E16D8EA3 95091776A0932E30 42A702A171C64466 5623A0E69D061ABC 8A10C95C479E105F 1400D86766720F86 9E0CF6C83C132C83 20CC416956FE872F 32C7D34C7385A5AD 4D6D54DFF2877DD5 A24596ECB263D212 73035FD82B8F9B84 1D27CBC1800A4798 467A8ACF8E63F928 1D5D5FB76BBC7C17 8EAED502904D138A F9552096897E40DF EC57F77D35A94001 57145C69FE6CD293 97A1DF50BA3BBFE7 853EAF7214E84EE8 3B9B71DA692A23D2 E53DCB45FF355FF9 E85EFC63C1C0F9C3 CC58FCB6D18847C7 35DAEC09475C55E7 F27DC0D30412AC55 873983186CFEFA7C E31B4EFBC1A0D532 D73B138870C748D1 CEAFA82C27C77920 F3F2E42248D28216 EB9B4F6B46AE585B 3C0766220DD4C56F F335656C4E2B7A52 3E3B1EFA3BEEBCC7 0B65951F3BC2E184 7FCA916F8B96C9FD CD3ABE728D68CA44 259CB56E7481E6AC 1CA6F5906BEA7E50 691481C3F44A702D A299FEE779BB9344 7737DB8F2FC2E785 451A7BA9929CE8F4 FF04EA9CEAEF4CC7 40D4433D0E7BC16C 5E90B012B67F80BE 963A44912FA2D868 F7B232D9BA5FCE33 0C7FED989CA4EFAB BC632F522C1B488E 26734437ACD1A2A2 DDB1D945220C41EC F7513FFB468B75DF BA35E52E87FDBCD9 71ADFAC47EEF2DDE 7E9CED4EDD72340E 588E3E223A72F094 DAB0938B0291E7B3 AAB194DEE32A75A2 3790532DC2450465 E6670F28943F982B F212A42D724FEE71 6EF79F5371F38E52 4A30DC5083C9EC51 FE08BCC92F815FDB D9A76C8BC571E520 D55629CEC6D5E73E F540906AEEF020A5 A8AD188C45532CA8 F7C19B8C0ABDEAA6 6E03D0905194A2FF 9FCAFC2C779EFAD4 39BBAA1411BE5E14 F6907712B7560DCB 3C4A7716B061AB2B 6F92F939BB5D957C 29DBBEC8D891CE7F CF84E8A08F98CB46 F989DADB5DF47183 79D221E12DC975DA 99D2A1DD8B77CD5C 7B6E4EFBC80E9A73 0AF786DC0AC94BD5 07F12ED1FF7292F1 37586B14D28F623D 6A68C577BDA94DB7 876E5AA3411A771F BE5AF0F6C9D71571 8929975D3692E709 827A2867E7927B33 22A7C11AB50D86BE D5B28A407381B33E 34690C6B68CB0368 278DB371918E1540 6E53B1492C71B3CA 1F05483BFFD9BB72 EAFC1DF51F0C3BD7 4326D8FB8D59BF12 7F1505A446A26DFB 6214CF465F3CA1BF 30F0B46A4DC3361F 657827D84CF0768F B21E1D2C96D90BF7 E0F5A721C4CDC8C0 20FFB74067DD91C8 39C192EE911E63F8 759E0E7897792C0D E55696205D2F86D1 A693DEFE9874474B 578AB985FD7C2A64 ACE2186040EC0DD4 B3F87E7A0F981C0F EFE29BF3BA5D0FD6 F30FEFFC1A787AD9 4D8A2269003AC959 663DBFE1E34AC5EF 4BC2F0C9260018E2 87242B823CA27CB4 271B13D73B02CA2D 1221EFFC3A332E93 CEFA360C4659F673 E120205B725D7917 2F0A00860E5CD9B5 F77EDD3C2EB4F176 797DC91F57BC9A7E 2E9AC733D690C60B 54003925117B651D 40788CAE5C6604BF 70737133981BFBAA F4CDD216281981C4 5A1AFF51F660C26E A2B5D8DC7EBC9308 B910B88E94C9640C AEA81B603F6FACAE CE1858263C4062E6 96A9A090EF687C74 928D2F4C23C55118 82B6A07DC2D33D8C 1524EDC21235CF1B D72FDA61CE9E7614 1677501E7FA9F8BA 2BF9FABFACAD6EBA 9DD8B21C8FA66F24 5906D3FEF37CFB6E 4521A6585D595AE2 4957285C5B377C74 1905ADCB5B08CF88 4C5BA9BDFAB95634 E7696E99DCD348EB 76D16F30A5C3C7F6 8212DB5FB7779B57 FC677FDA3BD3A6CE EE1961FE4CDFAC0D 33584394574B7A36 74ED5DD9E60767C6 EEF75A090A5C16EB 3EA5763A8C6A3365 98BE4EFA5D4ADB8D 05DEDF881BCE76EF C8267FE04BE3967D CEB5994C982B4181 B682597DBFADD9ED DE3BC61830014557 23A29CEDF7C3FAD4 221A22841CAF4A79 23DCE3DDCE8A1BAC 36AA6C67948A5427 001A41CFF0D23CEE 5C35F4619954399D C3EF4AAE6B7B672F 50ADE96F9C7B2A9E B515B733D14E2D43
  • Read the ciphertext. Strip whitespace: 2,832 hex characters = 1,416 bytes = 177 8-byte 3DES blocks.
  • Derive the key. Password = A858DE45F56D9BC9201302261826 (name+title). Key = MD5(password) = 458343ba95d69661e3d35144232d5437, 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 de56e8a7-1542-7e1a-b53a-424e4af57448
  2 36fa46ee-a5c0-8549-9d57-0f0a6fd44b1e
  3 c6784355-8ce5-7c31-bc4f-7386a39a6d3d
  4 987eeec2-4915-567a-bb56-85d3b11333d0
  5 e4a0138b-ea77-16fb-ae99-0e76bd6950cf
  6 3db528c8-b788-156c-b06b-aae3db5cdc91
  7 725d484d-d971-11d2-abc8-5287bc50a717
  8 f91c86df-790d-698f-bfb0-f07dd3619190
  9 4513d67d-04f0-4323-8809-f2fd0cc31890
 10 5befa4ee-4ffa-8d6f-b30b-6fff1b1648ca
 11 bcd276c0-9e43-1ef5-9ebc-1652a59cf10d
 12 4f520c41-8fde-87ac-b0ca-611a9331dc59
 13 0504fefe-2448-702a-829d-fc06d30191e4
 14 39ebdf38-9d2a-8a5b-8c75-fd4c84764932
 15 3c212a15-6965-63dc-9daf-da6e953589b7
 16 9785b347-09d4-1765-8ed7-12f8d5b6e8b3
 17 8748cfdf-b981-042f-9d6d-398093449f39
 18 8dcb973e-0d45-62e9-88ca-4d54cfe02f60
 19 d836c6ca-e9c6-3890-b3cb-7199c282b47a
 20 1c344127-851a-1812-b805-555ab84f6fe2
 21 efd34576-d5ff-209a-a07c-39c2c6e6a6bb
 22 fb3ee950-38b3-21e0-a0d2-bf8651b5cd21
 23 95b60f73-5a57-1169-9c54-c58b2ab94938
 24 546d4346-31b8-8430-b50d-6085a4cfbc42
 25 25093a86-9896-5ef3-99b1-2f147d4b9d89
 26 6c12c9a0-c787-8560-a3de-a4128ed8fc57
 27 14f197aa-9637-7272-b167-7a219d5c124f
 28 51582742-7731-0ad4-af6c-c80c16b11a07
 29 fefec0e9-2300-5598-b0b9-0544267c39e8
 30 06f00b55-c9f8-33f7-b801-fc359fc61173
 31 ecab0d87-b0eb-2741-a64a-ba1fbd6324e6
 32 45085653-a3a9-6a83-85df-51c15260f9b5
 33 c88d3ad5-2bdd-481e-9e53-2b1ddb7f9c1d
 34 f7fcff50-5480-102e-b84b-933a868c092e
 35 f5de6b96-64d6-37ed-84c8-0cdafec09ce7
 36 633dd5b7-fb4d-7e67-8ce4-a3912c9a3a68
 37 64a999cb-ae99-87f0-9884-fbfa0c3911c4
 38 e75ab567-7ce7-0c50-93cf-cba0974e3de4
 39 494572f7-4c9f-1d01-b7d4-51a191e7e121
 40 6a1cbc91-d332-6207-9118-01bbcf65baa9
 41 5a221e25-6f89-04aa-8c52-b735f5d1a15a
 42 6d50df2c-1ec4-819e-a990-d6b410fb8410
 43 4a1541f9-e2b8-2be9-a54b-e37cfbb9da9f
 44 2ce2a00b-f127-615b-a5f6-e393a48b23fa

Explanation

  1. Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 78751116481878610631221858705326413780160826. Exactly this sequence comes out of new Random(764).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 47 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