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	945	Jan. 4, 2020, 3:57 a.m.
Danhia		435	Jan. 4, 2020, 12:22 p.m.
antox	https://www.w0nderland.fr	225	June 13, 2020, 11:50 a.m.
Unactive		505	Jan. 25, 2021, 2:10 p.m.
arpascal	https://arnaud.sh	1845	Jan. 27, 2021, 10:49 p.m.
molivier		580	April 17, 2021, 2:53 a.m.
Yir		1020	Oct. 17, 2021, 9:38 p.m.
42stillsucks	https://www.youtube.com/watch?v=hfTAv8htci8	1175	Oct. 29, 2021, 9:28 p.m.
00101010		1115	Dec. 24, 2021, 4:27 p.m.
lmartin		1175	March 8, 2022, 5:45 p.m.
nieyraud		965	March 8, 2022, 5:47 p.m.
S_in	https://twitter.com/sin_infosec	990	March 9, 2022, 11:48 p.m.
clinche	https://github.com/clinche	1085	March 17, 2022, 12:45 p.m.
tpeters		190	June 12, 2022, 1:16 p.m.
Nyr		215	Oct. 16, 2022, 3:11 p.m.
riblanc		1120	Feb. 19, 2023, 1:02 p.m.
Syca	https://cyrihack.fr	1485	April 6, 2023, 5:29 p.m.
asarandi	https://github.com/asarandi	2080	May 23, 2023, 12:30 a.m.
Nics		130	June 2, 2023, 1:03 p.m.
eclypse666		590	Aug. 31, 2023, 10:39 p.m.
hsabir-xoreaxeax	https://github.com/lenartlola	1630	Sept. 27, 2023, 11:50 a.m.
albaud	https://github.com/Gymnopediese	720	Oct. 13, 2023, 12:34 p.m.
Ardcord		915	Oct. 22, 2023, 11:09 a.m.
Narmand		110	Nov. 14, 2023, 5:20 p.m.
Nochance		130	Nov. 17, 2023, 6 p.m.
MinjaeLee	https://github.com/MinjeaLee	1990	Sept. 26, 2024, 10:56 a.m.
BenJ4368		170	Nov. 15, 2024, 1:36 p.m.
a8ymgi01w@mozmail.com		175	Nov. 15, 2024, 1:36 p.m.
chabrune		95	Nov. 15, 2024, 1:43 p.m.
UncleReaton	https://unclereaton.dev	735	March 23, 2025, 12:18 a.m.