201309111659 1m6bv4
explained decrypted filler r/A858DE45
Filler on r/A858DE45: a masked GUID list, 44 GUIDs, seed 365. 3DES, key MD5(name+title), as on the main subreddit at the time.
From the post to its content
As posted (encrypted)
7EBC1848E1AB511D F33289FA6FD47BCB 58E6E587B5272935 AD23FB6E6CF9486F D8330FA210E5D598 278E272AB0B2C396 A82F18B48F598AE1 568053900BDA8E6F 6F3A7A93F5DE4F0B 804419653455DA22 B3497EC01C1455C3 586B6B422B66946A F0102C4071436B33 432E6452F6690FB2 03E60551BC465312 AC0314081706148B 46C5182D3C3F4585 14CF0F41A0D07307 6860183A693401E5 4AA8E504D50EFED6 403A334C37BAC2B3 8334A3ABD1DD2D75 76B66002DD20F166 D6BFF73D3806011B 1B9F7BFCE603C5FA FBF5CC62C2638EA6 D6B59862E2CC76CD 579EFC3354D13012 8EE9330B0E1BC8D6 59A2AA38595D5BE4 B87C185B1571B654 0B79140FBAC3A1AD 3248B29CE986AB06 7120EB33712102EC 41F43CD7EE1B4C3E CCE0EE662D4ACB09 A18D86B1FA6EA171 AE54DD2A44BAD0DC B372A63A7B518DDB 2B9AFDFF635B3865 77B72C93A14F7547 2545DEFCF8E13E9F D14E621D03D8EF8D C9C0F3E96B228073 BDCC50F67400920C 1AD1A733C1A991AC 632C9FC5E491BF93 483A81406DB0D9DC EFA05182A6D50205 AA42EA92F810749E FFE2A9F72C1CAA61 11FD3DF28FD335A5 D4F34720E2680B3E BB6AEE4555C5D26D B61F608FDC2E6C16 7930CDB2AC82911F F96A12EF6AA1AF26 C673DA4F6F9A47DE E3B19A20B24017E2 ACD6A28DBBB0B4A7 33F3812C59A91285 97B56E9486CB1B85 60AA40B5846CA33F D7C9E560F564DAE7 3842090FF21DCA64 C9F3311456955648 C0CC914F5CEEF1FF 11FF821B4CE422BD 2E6EC25640AE931D E3D0288384722115 924945A2FA0B2505 B899369C90BADAEB BDE2DAF24E623BEC 288BC7487AA98083 B98198AF6A474320 1247EAC00133A68F 5CD8958F36F70A81 777E267DA175A255 99FCD6AB3E37CCB3 DD8C6F861B82C49A F8DCB278B60B1381 1D47C8CD40D17A7E C03DAA16281B8A97 476F78BF08AE6807 0077314887E76C9A 7C5F84CF568E30F5 6D25AA046827C2C6 5134587AA8019B9E A249F89185FCA103 EFF754870382E72D F6AF5F5CEB09BBB8 FCB86F92E02420FF 6C4E3DFDFA6FFA0E 59734E3D9BC36DB0 345F4A0611FD4112 780C408EBC917908 27699262742D66B5 FF70B9DED48D05D7 DBE0443E49085BE8 E309443B95AD3EAD F9DC8EE723473738 B0A1F4B200BC6B75 AFE8EBA5C80AF2F8 E36205EA9F2C2E9F 0BB427E4D6A8AF82 4E5D1110FA854714 80C6F6433CD041CE 9B9D6EE7C0E6C6EB D0B1CF01BA9384CF 700B79DA9025717F DFF2CE4B89BED38F F24FC9B33FA1FE32 B218DEEED2C6E920 98DC71CD121BEAA3 92BBB4D54EF4B7F1 A418C862599A62B6 E657CF5CFB3591C5 350A11C33899026B 9A1B5A5BB94B1B66 2DC50578167B3BD3 113FAF703357F75B 1A4FB42F255D4C6F 948F3F2FDAF721AA 56BD882FEFF150AD 8F8402F3A5607767 79D42A809158A714 07FB00E5E0F810DC 870FCE8ED7DF0393 0A7887324910ACD1 A3E956B401357868 F9922D4F58CA8DD7 047705EB55C6B713 3B78D4748253B017 10AF8BF02E4C42A7 24F2186B89A460A9 9747071667C83590 FE810F4BFD69C88B 4CA86CFEAE88B29C FAA4CC48C6DC2E20 BBDA47DA23F870B2 E818A6F8D767EC59 BE578E85C2E06BD1 C86791BA7A0F86A7 B23FC03C67546527 5D351DED29AD374C 55FD4AE06852A3AA A94AE7F345A7DA62 5A362A71C292C6C6 490FBC5A59CA95BB D88A0D3B31CE5F7F EE9D07B4E645A2FF 545828526F445DA7 F680BC0697BB0159 657461A33D71F34C 956986474F5BAF2C B0CB0EA7605BAE9A 80F5CD0EFA9F308C 3DB172F007AECD6E EDB4BC3D8EEB8138 465E373EABEDDE9D 7ACB1F8D171DB9AF E2D283E1AB13C669 C2F4F2E18F1BB604 2D6945802A683E29 D75EDA313BC0C266 2952BB1858D53812 365F359BDC26232B F8EAFF3B622ACC08 3650B2409DDFD54F 1ED8C7887946355F 4A13E0F7AA9DC562 7F23F866E2171B67 EC83C3A39A94CA6C BB475ECA71FEDFC4 B7257F5D59469E46 DACC7F64CE6E96E9 EFCB9C85C3095021
- Read the ciphertext. Strip whitespace: 2,832 hex characters = 1,416 bytes = 177 8-byte 3DES blocks.
- Derive the key. Password =
A858DE45F56D9BC9201309111659(name+title). Key = MD5(password) =24c71746c6b049bce735266a3b4efd87, 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 08f05cc9-bd71-3d98-944e-b832e562a13f 2 f3463661-020d-8b19-b446-8ce13393933b 3 66085457-5523-8934-9e3e-852ff53cc043 4 f5623d5f-091f-4139-bf7a-ed91ba429a82 5 066d0d8c-915c-843b-966a-2fbbb3b870a0 6 cc61dfd5-811a-485d-a269-6a0b6561f7d0 7 96531946-962f-4799-b57a-dca4b449e648 8 8c9f72b8-7157-54ef-9988-c56e002a2e02 9 93c1c2e2-4c4d-17f0-897a-15461ab6c219 10 91f4bcaf-a50d-7bdf-b8b0-e78355ba0ae2 11 75c93cc7-832f-1064-aafc-5c8f5539dfc3 12 83ee8c26-93d0-3952-9f2a-d9dfb9efdaa9 13 a7496c27-f183-4c87-9bd3-dc42825f4a07 14 cd8a054c-d804-3ddb-a1e3-53e5415eed4c 15 7886c712-dc9a-4ab2-8a05-fa82d220ec9c 16 716f3986-2f5c-857a-8036-e395800098ef 17 9980a14d-8c58-239d-9ce6-676e7a144e34 18 f0679ce5-1eb5-23c8-a5d6-df0edd153691 19 141a9677-29da-5e11-ae13-3a9640bf0f46 20 6d5c9d6e-73cb-5b22-941d-b0f0b27ea2cd 21 e1665321-5d7f-208b-b05f-badd314e91c6 22 01a17724-e3aa-3c4e-a605-957d7d445bc6 23 588389b2-51fd-6c73-9790-a54aba04642f 24 7bb83f5b-2093-421c-b460-d02f49cf7b9d 25 7e2cebc9-51bc-4160-a8f4-f4d285f097c4 26 1831b542-f3b7-2c07-aae3-6bce8ec0ee29 27 255bc219-9ff1-6d2f-aedb-3face091e7c5 28 0874a04b-559b-7b3e-9664-5577caf6e8d6 29 4c5cefd8-0950-3a26-b8f8-3ed32fdf04cf 30 869d606c-a0b5-0620-a502-2bfdd6d928d7 31 bf7c0251-c687-87e3-b442-cd0e7bdc4824 32 963449e0-7257-555d-9d3c-259bf4741378 33 72574dd1-a037-0261-a886-b9ff062b3683 34 bb5b7889-f958-1cbd-b9bb-0357dcd638f1 35 d9658488-7983-005b-85dc-e0ff7fdc1052 36 19976a18-3474-5355-bd56-d206e39fa273 37 194d0eaa-eaea-3320-8797-b29292506fac 38 27543c22-d254-15de-a30b-ba5d0aed3c57 39 9f202046-d376-7efe-b9da-38df8d461ad3 40 55b8f81f-c1ac-1912-83d1-c42f5cddd66f 41 7b30a1ec-0f1e-6f2f-bf81-2bcf925c3069 42 d5deca3b-3609-1ee7-98d9-2d2212f64ca7 43 2af56422-eb80-8f27-9682-1c1cad40b4fb 44 5df79e6a-30af-5f44-9fcb-9aa09f2c6daa
Explanation
- Explain the mask digits. The version nibble (13th hex digit) of each GUID, read in order, gives
38848445171343482255236442673085010531716185. Exactly this sequence comes out ofnew Random(365).Next(9): the per-post millisecond seed of the mask generator. The other 30 hex digits of each GUID areGuid.NewGuid()output and carry no message. - Conclusion. Filler. The GUIDs are fully explained by the mask-digit RNG; no count stream is placed for this post.