Identified author

Published date : Jan. 4, 2020, 12:16 a.m.
Hill Cipher - Known plaintext
Our spy has intercepted this message. It contains the meeting place of double agents working for our enemies. Unfortunately, we haven't decrypted it yet.

The only hint we have is the name of the author that our spy has been able to identify: BROWN.

Good luck.

PS: the flag is 42CTF{THEPLACEOFMEETING}

Solved by

Username Website Score Date
reveng https://twitter.com/revengsh 830 Jan. 4, 2020, 3:57 a.m.
Danhia 400 Jan. 4, 2020, 12:22 p.m.
antox https://www.w0nderland.fr 195 June 13, 2020, 11:50 a.m.
Unactive 465 Jan. 25, 2021, 2:10 p.m.
arpascal https://arnaud.sh 1650 Jan. 27, 2021, 10:49 p.m.
molivier 520 April 17, 2021, 2:53 a.m.
Yir 920 Oct. 17, 2021, 9:38 p.m.
42stillsucks https://www.youtube.com/watch?v=hfTAv8htci8 1065 Oct. 29, 2021, 9:28 p.m.
00101010 990 Dec. 24, 2021, 4:27 p.m.
lmartin 1060 March 8, 2022, 5:45 p.m.
nieyraud 865 March 8, 2022, 5:47 p.m.
S_in https://twitter.com/sin_infosec 885 March 9, 2022, 11:48 p.m.
clinche https://github.com/clinche 1865 March 17, 2022, 12:45 p.m.
tpeters 165 June 12, 2022, 1:16 p.m.
Nyr 190 Oct. 16, 2022, 3:11 p.m.
riblanc 1250 Feb. 19, 2023, 1:02 p.m.
Syca https://cyrihack.fr 1320 April 6, 2023, 5:29 p.m.
asarandi https://github.com/asarandi 1865 May 23, 2023, 12:30 a.m.
Nics 110 June 2, 2023, 1:03 p.m.
eclypse666 515 Aug. 31, 2023, 10:39 p.m.
hsabir-xoreaxeax https://github.com/lenartlola 1520 Sept. 27, 2023, 11:50 a.m.
albaud https://github.com/Gymnopediese 650 Oct. 13, 2023, 12:34 p.m.
Ardcord 1070 Oct. 22, 2023, 11:09 a.m.
Narmand 100 Nov. 14, 2023, 5:20 p.m.
Nochance 120 Nov. 17, 2023, 6 p.m.
MinjaeLee https://github.com/MinjeaLee 1780 Sept. 26, 2024, 10:56 a.m.
BenJ4368 150 Nov. 15, 2024, 1:36 p.m.
a8ymgi01w@mozmail.com 155 Nov. 15, 2024, 1:36 p.m.
chabrune 90 Nov. 15, 2024, 1:43 p.m.
UncleReaton https://unclereaton.dev 700 March 23, 2025, 12:18 a.m.
ikkiw 1035 May 23, 2025, 1:45 p.m.
altaubee https://github.com/taubeskiceh 115 Aug. 17, 2025, 11:56 p.m.
Dueshell 275 Dec. 10, 2025, 7:09 p.m.
bouliboula 545 Dec. 11, 2025, 9:50 a.m.