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	790	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	1590	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	1025	Oct. 29, 2021, 9:28 p.m.
00101010		955	Dec. 24, 2021, 4:27 p.m.
lmartin		1025	March 8, 2022, 5:45 p.m.
nieyraud		835	March 8, 2022, 5:47 p.m.
S_in	https://twitter.com/sin_infosec	850	March 9, 2022, 11:48 p.m.
clinche	https://github.com/clinche	1785	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	1285	April 6, 2023, 5:29 p.m.
asarandi	https://github.com/asarandi	1785	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	1465	Sept. 27, 2023, 11:50 a.m.
albaud	https://github.com/Gymnopediese	630	Oct. 13, 2023, 12:34 p.m.
Ardcord		1200	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	1700	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		990	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	1745	Jan. 7, 2026, 8:37 a.m.