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	915	Jan. 4, 2020, 3:57 a.m.
Danhia		420	Jan. 4, 2020, 12:22 p.m.
antox	https://www.w0nderland.fr	215	June 13, 2020, 11:50 a.m.
Unactive		495	Jan. 25, 2021, 2:10 p.m.
arpascal	https://arnaud.sh	1805	Jan. 27, 2021, 10:49 p.m.
molivier		550	April 17, 2021, 2:53 a.m.
Yir		990	Oct. 17, 2021, 9:38 p.m.
42stillsucks	https://www.youtube.com/watch?v=hfTAv8htci8	1150	Oct. 29, 2021, 9:28 p.m.
00101010		1095	Dec. 24, 2021, 4:27 p.m.
lmartin		1150	March 8, 2022, 5:45 p.m.
nieyraud		945	March 8, 2022, 5:47 p.m.
S_in	https://twitter.com/sin_infosec	970	March 9, 2022, 11:48 p.m.
clinche	https://github.com/clinche	1050	March 17, 2022, 12:45 p.m.
tpeters		180	June 12, 2022, 1:16 p.m.
Nyr		205	Oct. 16, 2022, 3:11 p.m.
riblanc		1085	Feb. 19, 2023, 1:02 p.m.
Syca	https://cyrihack.fr	1445	April 6, 2023, 5:29 p.m.
asarandi	https://github.com/asarandi	2035	May 23, 2023, 12:30 a.m.
Nics		120	June 2, 2023, 1:03 p.m.
eclypse666		555	Aug. 31, 2023, 10:39 p.m.
hsabir-xoreaxeax	https://github.com/lenartlola	1665	Sept. 27, 2023, 11:50 a.m.
albaud	https://github.com/Gymnopediese	710	Oct. 13, 2023, 12:34 p.m.
Ardcord		880	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	1945	Sept. 26, 2024, 10:56 a.m.
BenJ4368		160	Nov. 15, 2024, 1:36 p.m.
a8ymgi01w@mozmail.com		165	Nov. 15, 2024, 1:36 p.m.
chabrune		90	Nov. 15, 2024, 1:43 p.m.
UncleReaton	https://unclereaton.dev	715	March 23, 2025, 12:18 a.m.
ikkiw		1140	May 23, 2025, 1:45 p.m.