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	785	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	1585	Jan. 27, 2021, 10:49 p.m.
molivier		495	April 17, 2021, 2:53 a.m.
Yir		875	Oct. 17, 2021, 9:38 p.m.
42stillsucks	https://www.youtube.com/watch?v=hfTAv8htci8	1020	Oct. 29, 2021, 9:28 p.m.
00101010		950	Dec. 24, 2021, 4:27 p.m.
lmartin		1020	March 8, 2022, 5:45 p.m.
nieyraud		830	March 8, 2022, 5:47 p.m.
S_in	https://twitter.com/sin_infosec	845	March 9, 2022, 11:48 p.m.
clinche	https://github.com/clinche	1780	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		1205	Feb. 19, 2023, 1:02 p.m.
Syca	https://cyrihack.fr	1280	April 6, 2023, 5:29 p.m.
asarandi	https://github.com/asarandi	1780	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	1460	Sept. 27, 2023, 11:50 a.m.
albaud	https://github.com/Gymnopediese	625	Oct. 13, 2023, 12:34 p.m.
Ardcord		1195	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	1695	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	675	March 23, 2025, 12:18 a.m.
ikkiw		985	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	1740	Jan. 7, 2026, 8:37 a.m.