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	875	Jan. 4, 2020, 3:57 a.m.
Danhia		415	Jan. 4, 2020, 12:22 p.m.
antox	https://www.w0nderland.fr	205	June 13, 2020, 11:50 a.m.
Unactive		485	Jan. 25, 2021, 2:10 p.m.
arpascal	https://arnaud.sh	1740	Jan. 27, 2021, 10:49 p.m.
molivier		535	April 17, 2021, 2:53 a.m.
Yir		970	Oct. 17, 2021, 9:38 p.m.
42stillsucks	https://www.youtube.com/watch?v=hfTAv8htci8	1110	Oct. 29, 2021, 9:28 p.m.
00101010		1050	Dec. 24, 2021, 4:27 p.m.
lmartin		1105	March 8, 2022, 5:45 p.m.
nieyraud		905	March 8, 2022, 5:47 p.m.
S_in	https://twitter.com/sin_infosec	935	March 9, 2022, 11:48 p.m.
clinche	https://github.com/clinche	1295	March 17, 2022, 12:45 p.m.
tpeters		175	June 12, 2022, 1:16 p.m.
Nyr		195	Oct. 16, 2022, 3:11 p.m.
riblanc		1050	Feb. 19, 2023, 1:02 p.m.
Syca	https://cyrihack.fr	1390	April 6, 2023, 5:29 p.m.
asarandi	https://github.com/asarandi	1970	May 23, 2023, 12:30 a.m.
Nics		115	June 2, 2023, 1:03 p.m.
eclypse666		535	Aug. 31, 2023, 10:39 p.m.
hsabir-xoreaxeax	https://github.com/lenartlola	1600	Sept. 27, 2023, 11:50 a.m.
albaud	https://github.com/Gymnopediese	675	Oct. 13, 2023, 12:34 p.m.
Ardcord		840	Oct. 22, 2023, 11:09 a.m.
Narmand		100	Nov. 14, 2023, 5:20 p.m.
Nochance		120	Nov. 17, 2023, 6 p.m.
MinjaeLee	https://github.com/MinjeaLee	1880	Sept. 26, 2024, 10:56 a.m.
BenJ4368		155	Nov. 15, 2024, 1:36 p.m.
a8ymgi01w@mozmail.com		160	Nov. 15, 2024, 1:36 p.m.
chabrune		90	Nov. 15, 2024, 1:43 p.m.
UncleReaton	https://unclereaton.dev	685	March 23, 2025, 12:18 a.m.
ikkiw		1090	May 23, 2025, 1:45 p.m.