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	780	Jan. 4, 2020, 3:57 a.m.
Danhia		375	Jan. 4, 2020, 12:22 p.m.
antox	https://www.w0nderland.fr	185	June 13, 2020, 11:50 a.m.
Unactive		445	Jan. 25, 2021, 2:10 p.m.
arpascal	https://arnaud.sh	1580	Jan. 27, 2021, 10:49 p.m.
molivier		495	April 17, 2021, 2:53 a.m.
Yir		870	Oct. 17, 2021, 9:38 p.m.
42stillsucks	https://www.youtube.com/watch?v=hfTAv8htci8	1015	Oct. 29, 2021, 9:28 p.m.
00101010		945	Dec. 24, 2021, 4:27 p.m.
lmartin		1015	March 8, 2022, 5:45 p.m.
nieyraud		825	March 8, 2022, 5:47 p.m.
S_in	https://twitter.com/sin_infosec	840	March 9, 2022, 11:48 p.m.
clinche	https://github.com/clinche	1775	March 17, 2022, 12:45 p.m.
tpeters		155	June 12, 2022, 1:16 p.m.
Nyr		180	Oct. 16, 2022, 3:11 p.m.
riblanc		1200	Feb. 19, 2023, 1:02 p.m.
Syca	https://cyrihack.fr	1275	April 6, 2023, 5:29 p.m.
asarandi	https://github.com/asarandi	1775	May 23, 2023, 12:30 a.m.
Nics		100	June 2, 2023, 1:03 p.m.
eclypse666		495	Aug. 31, 2023, 10:39 p.m.
hsabir-xoreaxeax	https://github.com/lenartlola	1455	Sept. 27, 2023, 11:50 a.m.
albaud	https://github.com/Gymnopediese	620	Oct. 13, 2023, 12:34 p.m.
Ardcord		1190	Oct. 22, 2023, 11:09 a.m.
Narmand		95	Nov. 14, 2023, 5:20 p.m.
Nochance		115	Nov. 17, 2023, 6 p.m.
MinjaeLee	https://github.com/MinjeaLee	1690	Sept. 26, 2024, 10:56 a.m.
BenJ4368		140	Nov. 15, 2024, 1:36 p.m.
a8ymgi01w@mozmail.com		145	Nov. 15, 2024, 1:36 p.m.
chabrune		85	Nov. 15, 2024, 1:43 p.m.
UncleReaton	https://unclereaton.dev	670	March 23, 2025, 12:18 a.m.
ikkiw		980	May 23, 2025, 1:45 p.m.
altaubee	https://github.com/taubeskiceh	105	Aug. 17, 2025, 11:56 p.m.
Dueshell		420	Dec. 10, 2025, 7:09 p.m.
bouliboula		530	Dec. 11, 2025, 9:50 a.m.
skav	https://www.logogenie.fr	1735	Jan. 7, 2026, 8:37 a.m.