201305150359 1ede7j

explained decrypted filler

seed 537

Metadata

Post ID: 1ede7j
Title: 201305150359 → 2013-05-15 03:59 on A858's clock
Posted (UTC): 2013-05-15 07:59:59
Timezone: UTC−4 · title 03:59 against posted 07:59 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(A858DE45F56D9BC9) = 34a14a42e98ff96095af56604e290cae (name)
GUIDs: 44
Filler GUID seed: new Random(537).Next(9) ✓ verified
Run: 1ec2zo (short)
Draw: 5 (assumed: numbered from the first post)
Sources: community-archive, arctic-shift · body from community-archive
Links: Reddit · Arctic Shift · JSON
Score · comments: 17 · 0
Tags: automated (decryptable)2013Encrypted masked GUID listkey: namerun: short

From the post to its content

As posted (encrypted)

861F7E97A1DA8709 4634C88852DF51CD C82FEA1353F1FD78 35AE961EB41F69ED 380749A36658CFD4 80892407B6BB511C F8D81A1AC62F5714 9BBC976159AAB577 CEE9403F71912CA7 F0B72FB19DD22667 B0B344E0E60FA719 AADDADEF50E504E0 A2F1EF4233709F00 20D2176314E0E341 3E999EAA663A4634 90026C5A54B457D8 35A778A7015477C5 2711E201A863FA8A 7D77590BFD89F7AB 5395196BC3B55790 1B4643290EE001D9 5D283E787FB1EB6D CEE1E50758AFA567 0AF07B7A6FF920D3 2F46048306E87E1D 5793116529834BF7 B22DC87D815FD64C 030EE9B97CCD8DFF C6C368C6A0538C75 E6FD06D79BA8CE69 9699B32BA5E77E4C F015192539A0769A 50E82198F6EAEBA3 0FC9A7D35A2BBF0D 0A9FF5AE3F873750 6C65A7B1EC8E34B0 D7ECA3FD96F1024B B64B826E14779539 A1670DFEE8C06320 962E1447D282AFBC 6848800DCA50BB38 EB84765A01978E20 8F97A5AA70B76880 E79D1784CF052F2E 11D304B73428F50C C0953A4CC545E872 D6538C6620B2BF46 EF9CCFF46FF692B9 C11F0BEAAA0217A5 23BAA025FF8A3540 9B8425BF1F27E12C 40203D7C11D5D984 21FD1267D99AFBB2 6AE2B69C453D75F9 7495E8AC71B12261 2CC2EE083E7A7B8A E2A3B84F431B36D9 C8DB7FA855AA05F0 2F70341A29F77CC5 49581722E29B0D28 4242975024464EFF 4E762545CE53CC9A B4F512A8B8B73A04 B32B9D9F24EB011A 86E39DDEC1627EC0 E1D73638B4CF7053 8BE88C7FEA315C9B B4DA5F68FF4351E4 9B50683E4F84AE15 3F73C4535C997407 CCAA55CBBC62CF6E BB318937489862DF 7B86C6304DC566A7 CF1F734823605037 8526545F1EC935C8 6F248CB0A1208278 7822ECF606D066F4 2C1109E51ED64224 A03AF9E01E42CAAE 43F8AC72648E45BC 5B5E097EB2C11C94 44827F9D6BE5FC47 C53D8ECE5345E7D7 4A16365E8FE7F695 59D81C274498D2CC 53ACE43346E5CA32 866066CF90896C32 5B4EFE87D012B1AE EACB557F256F176A 076AC1B29E7E31D7 2D92D6CAFD18A1A1 26D51FFB9F7007EE DE43F83B3ED339B9 4DA96885912768B5 5F8EFD862290BAF1 FBE1B5F1F1074AC9 A96EA3A11DAC4611 08FC03C6D81EE06C F6A4C4C91CDD8056 FE1476F96658E362 297CF69A18079A6E 7C8D345F2B9C235F 6C1A49783B199FF2 388A06C2523B7F22 1983DED8BBA5E0DC 26D72F1B3D6192B0 56F32CD2F7467B59 0A4D6FFBB94CE228 1BE2E66C78BE9F4E D0A09B355E39A16A 3FE546978B0F1873 4BD168DBD3235B4C 1CE54D8D5BF1B60F 0E4D79D4D10FF1A9 F4914F9060824BE3 F0ECA1C682290E0C 1BBA6438567D901C A310BD9C7D203088 4647223AA9009E2D F32C517DC232976F AA3C4CB724FCEC2A 84467E0FAD1AF1E6 253B076EE6735225 A28E8D865A336A50 1610207EDDF5AA9C 6CCA3BBCF8877B10 0CD9935EB14816B0 66905C75B2A97139 2A0FAA535F5875CA 47F682FDAE3C1E5C 3A57CCF0F3A1628F 62CEECE6C959E202 BB0390B5929B95A6 3EA301A367935A53 971D771E46C59AE7 1E0B691DDD26385B 19FFCFCD5F56A724 E14D467ED16F4AD3 4339AD2AEBFD6B50 DF85F26CDCED8B70 E95383147CA49D18 4FAF66DFC3273286 7BA258B40ACC1BD4 1743C5896AF8032A 6C7BCD70050EFA50 655F363DDB3C67BF 0D14A77FAFA7BE20 25649ED4727994CB D21126F760E9D4C4 5083D28C97F9C336 0E335B1937EBF110 E07FE48531662650 2CF6CAF3C4ED25A6 AA13F7C8903618FA 5C8472D8FB87ECB1 8A6B970AFD63D90D 9C1A3AFDA554E0EE 575AC529F33B395C FC51E3306F513178 B146832AEA375B7D CE0C64ABE109FF05 469E86D68B83A96D 721F3576CF38BD63 4627CD9217922E1A A49126CF2850B049 C3709E8384AC4F43 531765FFF49D95B9 63FF7C03C12279AF B239E8F9568E1240 FF35C5DB54211BD2 5197898D7D6836E9 8EC3A79960E59F71 D76848F42D016EE6 C76D4D3D9A15E816 434D78C0AF65B123 970746DC86B90713 5DACFFBA8FF64DBD

Read the ciphertext. Strip whitespace: 2,832 hex characters = 1,416 bytes = 177 8-byte 3DES blocks.
Derive the key. Password = A858DE45F56D9BC9 (name). Key = MD5(password) = 34a14a42e98ff96095af56604e290cae, 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 31405604-9094-2934-9c49-46e89978b8b9
  2 4fad7cc0-f16e-303c-b441-efc55cc595ad
  3 41481909-50fa-183e-8f5e-e1ee8ffa5a23
  4 d88935bd-dd52-1b46-8a1e-2a24f45aa983
  5 dc0331d3-8c8f-598b-ae20-e715f0aab7bb
  6 61e2a032-5a15-746c-b152-d7907c1be056
  7 a6dd24cb-8ab8-4ede-a4e4-300b1bdd37e8
  8 b321c9f8-3a62-75e2-8ad2-053b27452c0f
  9 07cef2ec-5c23-374b-89ca-4716d768ddf0
 10 20666d5d-f478-2cf6-9912-9f93b119b646
 11 45cba372-8a60-81cf-aab3-48dc31b79685
 12 b0fabb2c-ff69-64ee-99e6-8bf5b50aeb2b
 13 fbbcd6c1-ea17-7767-bb92-a7ad5f763054
 14 543ba804-7beb-786d-9585-9a05b22764ca
 15 e0795f2a-af6e-7102-b4ba-64a43d02a5d5
 16 5a2e7f17-8146-3deb-873a-f14ad68d6421
 17 6fdbad4a-e645-565e-9ed4-3d6fc15d09be
 18 45e1f9c8-dc6f-8efc-b8dc-c8f96ac202e6
 19 343df148-cb4a-161d-881c-d746a7830dcb
 20 0a7bd2bb-c5df-26c5-8aef-5d2758cd0516
 21 7ab18dd3-3dc0-196f-aabd-fc6f6e8062b4
 22 b98ec626-7659-5e4c-ad79-8286446b0e5e
 23 ba4ed7e2-18ff-60e2-ba77-99c13fb0cae2
 24 f55a3b31-2c9b-53f4-b7e5-c109ac51af1c
 25 03425681-70d1-2a2a-93fb-cb2b97672962
 26 cb1c49cc-47fb-8e4b-a58e-304242e6147a
 27 0e891f17-ad6d-5189-9e8a-f24c17447e82
 28 63be2e28-cde8-3e86-89ae-b850a6ddcaf9
 29 0d4bf78b-1d6c-7062-8f4e-d5d2b1d4d5a9
 30 a324b5ad-6252-58cd-b637-b01604f4de65
 31 4bd3fccb-1e88-3465-910d-907b5f22decb
 32 71c53d44-0d09-88c5-8e18-f5c1a5c74e38
 33 7b3c6364-aa41-28c2-b01e-aed77cee0aa3
 34 8503c77e-ba56-4fe9-a96d-d5fc27d8f587
 35 158aa136-01b3-1b5e-aefa-9a099c01add0
 36 a645b0f2-1f5e-0578-bb1a-de84c9dcc214
 37 857a9a60-db11-7d82-833e-8ad684edec8a
 38 2a705361-f334-365f-a73d-e89f0de0310e
 39 6e58bd91-7b41-2aae-a384-cf899e511467
 40 7e0b4d87-09e0-7f5d-99e9-0d9231ed9e4b
 41 8017130d-257d-62e4-80b7-ad50e4479534
 42 3d96d782-aeae-8a19-a1f0-65ceb1e058fd
 43 2c497d88-5099-332d-a73f-77b1d264508e
 44 ed8611ac-f7a0-01fa-98d4-430d468e90c7

Explanation

Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives 23115747328677735812156528537538241073276830. Exactly this sequence comes out of new Random(537).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. Grouped in 1ec2zo: range-8 piece (5 posts, 15 bits): undecidable even with an exact boot
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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