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		440	Jan. 25, 2021, 2:10 p.m.
arpascal	https://arnaud.sh	1575	Jan. 27, 2021, 10:49 p.m.
molivier		495	April 17, 2021, 2:53 a.m.
Yir		865	Oct. 17, 2021, 9:38 p.m.
42stillsucks	https://www.youtube.com/watch?v=hfTAv8htci8	1010	Oct. 29, 2021, 9:28 p.m.
00101010		940	Dec. 24, 2021, 4:27 p.m.
lmartin		1010	March 8, 2022, 5:45 p.m.
nieyraud		820	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	1765	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		1195	Feb. 19, 2023, 1:02 p.m.
Syca	https://cyrihack.fr	1270	April 6, 2023, 5:29 p.m.
asarandi	https://github.com/asarandi	1765	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	1450	Sept. 27, 2023, 11:50 a.m.
albaud	https://github.com/Gymnopediese	615	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	1680	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		535	Dec. 11, 2025, 9:50 a.m.
skav	https://www.logogenie.fr	1725	Jan. 7, 2026, 8:37 a.m.
paulo-do		210	March 5, 2026, 2:04 a.m.