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	775	Jan. 4, 2020, 3:57 a.m.
Danhia		375	Jan. 4, 2020, 12:22 p.m.
antox	https://www.w0nderland.fr	180	June 13, 2020, 11:50 a.m.
Unactive		435	Jan. 25, 2021, 2:10 p.m.
arpascal	https://arnaud.sh	1560	Jan. 27, 2021, 10:49 p.m.
molivier		495	April 17, 2021, 2:53 a.m.
Yir		860	Oct. 17, 2021, 9:38 p.m.
42stillsucks	https://www.youtube.com/watch?v=hfTAv8htci8	1005	Oct. 29, 2021, 9:28 p.m.
00101010		935	Dec. 24, 2021, 4:27 p.m.
lmartin		1010	March 8, 2022, 5:45 p.m.
nieyraud		815	March 8, 2022, 5:47 p.m.
S_in	https://twitter.com/sin_infosec	835	March 9, 2022, 11:48 p.m.
clinche	https://github.com/clinche	1750	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		1185	Feb. 19, 2023, 1:02 p.m.
Syca	https://cyrihack.fr	1260	April 6, 2023, 5:29 p.m.
asarandi	https://github.com/asarandi	1750	May 23, 2023, 12:30 a.m.
Nics		100	June 2, 2023, 1:03 p.m.
eclypse666		490	Aug. 31, 2023, 10:39 p.m.
hsabir-xoreaxeax	https://github.com/lenartlola	1435	Sept. 27, 2023, 11:50 a.m.
albaud	https://github.com/Gymnopediese	610	Oct. 13, 2023, 12:34 p.m.
Ardcord		1185	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	1665	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	665	March 23, 2025, 12:18 a.m.
ikkiw		975	May 23, 2025, 1:45 p.m.
altaubee	https://github.com/taubeskiceh	105	Aug. 17, 2025, 11:56 p.m.
Dueshell		415	Dec. 10, 2025, 7:09 p.m.
bouliboula		535	Dec. 11, 2025, 9:50 a.m.
skav	https://www.logogenie.fr	1710	Jan. 7, 2026, 8:37 a.m.
paulo-do		210	March 5, 2026, 2:04 a.m.
timatias	https://github.com/tiagomatias930/tiagomatias930	775	March 22, 2026, 4:12 a.m.