Advent of OSINT 2024

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December 9, 2024

By AEGE

Challenge created by "Club OSINT & Veille" of AEGE under the supervision of Steven Deffous, for the promotion of the 2025 CTF Bleuet de France.

During World War II, cyber defense did not exist. However, to counter potential German wiretapping and protect communications, resistance fighters relied on encoding and intelligence techniques. The struggle to safeguard their messages was intense!

Using a telephone code commissioned on April 15, 1945, you can decrypt the following message: « Ursule, Théophile, Victor, Noemie, Georges, Emile, Kleber, Bernard, Robert, Marie, Xavier, Xavier, Georges, Emile ».

 What is the decrypted message (as written in french)?

Answer format: fondue au poivre

Number of resolutions : 379

You need to have an account to be classified.

# Username Elapsed Time
1 Barkana 0h 4m 12s
2 mrlrnt 0h 7m 4s
3 Bl1nk_ 0h 7m 12s
4 Shai 0h 7m 20s
5 MisTurtle 0h 7m 31s
6 Alescara 0h 7m 31s
7 Grand-Duc 0h 8m 42s
8 Hopla 0h 8m 45s
9 Sylvain M. 0h 9m 0s
10 Arwed 0h 9m 21s
11 Clément V 0h 9m 24s
12 Audrey 0h 9m 46s
13 Pablito 0h 9m 56s
14 Froggy 0h 10m 16s
15 Zoé 0h 10m 26s
16 Micka 0h 10m 30s
17 NaCl 0h 10m 31s
18 Maël C. 0h 10m 41s
19 Ragnarok 0h 10m 44s
20 Z-F 0h 10m 48s
21 Stéphanie 0h 11m 31s
22 Caneton85 0h 11m 36s
23 Arthur I 0h 11m 59s
24 Caillourocher 0h 12m 28s
25 H0n3yBadg3r 0h 12m 32s
26 Damien 0h 12m 45s
27 Pirouette 0h 12m 47s
28 Nath21 0h 12m 48s
29 finville 0h 13m 1s
30 Lgiacalo 0h 13m 23s
31 Zaiross8 0h 14m 8s
32 agentx 0h 14m 27s
33 VFD 0h 15m 17s
34 Baptiste.BC 0h 15m 38s
35 Amethyst 0h 15m 41s
36 Zéphir 0h 15m 45s
37 SévJ 0h 15m 49s
38 Aelros 0h 16m 0s
39 Ronan M 0h 16m 12s
40 Momo 0h 16m 14s
41 Teinturier 0h 16m 17s
42 Peip1_2_rez1 0h 16m 23s
43 Enairolf 0h 16m 25s
44 Mr.Short 0h 16m 39s
45 Coline 0h 16m 53s
46 ChH 0h 17m 1s
47 FerLem 0h 17m 10s
48 TD2 | Nathan 0h 17m 24s
49 EliAn 0h 17m 33s
50 Thibault 0h 17m 41s
51 pok 0h 17m 41s
52 dhm 0h 18m 17s
53 Seb2lyon 0h 18m 18s
54 thymauthaie 0h 18m 45s
55 El_le_bib 0h 19m 6s
56 R3børn 0h 19m 57s
57 aphistache 0h 20m 29s
58 OLINT 0h 20m 50s
59 Camille E. 0h 20m 59s
60 Loupin 0h 21m 21s
61 Isolde d'Icarus 0h 21m 23s
62 Ben 10 0h 21m 23s
63 FollowTheMoon 0h 21m 31s
64 Utbo 0h 21m 32s
65 yannito 0h 22m 10s
66 eric 0h 22m 41s
67 etienne 0h 22m 59s
68 Degun 0h 22m 59s
69 Nathan 0h 23m 8s
70 Alice 0h 23m 16s
71 Tenderhope 0h 23m 49s
72 Aha 0h 24m 13s
73 CharlaineP 0h 24m 13s
74 Nataly 0h 24m 16s
75 AlexPN 0h 24m 43s
76 Sophia 0h 25m 7s
77 Anaïs 0h 25m 40s
78 MarineBlue 0h 26m 6s
79 PPO 0h 26m 42s
80 Jex 0h 27m 3s
81 Soahn Louangphixay 0h 27m 13s
82 enagrom 0h 28m 22s
83 Tani6 0h 29m 0s
84 petale 0h 29m 6s
85 Fantomette 0h 29m 29s
86 Grofellos 0h 31m 7s
87 fernape 0h 32m 49s
88 Ch3w13 0h 33m 11s
89 Marie 0h 33m 43s
90 Guiwaf 0h 33m 54s
91 k1rif13 0h 34m 52s
92 Фане 0h 35m 7s
93 Gryff de l'aube 0h 35m 34s
94 Anonyme 0h 36m 2s
95 bynight 0h 36m 42s
96 O_sinteur 0h 39m 7s
97 DoryB 0h 39m 20s
98 tayflor 0h 40m 8s
99 AC2002FR 0h 42m 17s
100 Th3rd 0h 42m 36s