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		410	Jan. 4, 2020, 12:22 p.m.
antox	https://www.w0nderland.fr	205	June 13, 2020, 11:50 a.m.
Unactive		480	Jan. 25, 2021, 2:10 p.m.
arpascal	https://arnaud.sh	1735	Jan. 27, 2021, 10:49 p.m.
molivier		530	April 17, 2021, 2:53 a.m.
Yir		965	Oct. 17, 2021, 9:38 p.m.
42stillsucks	https://www.youtube.com/watch?v=hfTAv8htci8	1105	Oct. 29, 2021, 9:28 p.m.
00101010		1045	Dec. 24, 2021, 4:27 p.m.
lmartin		1100	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		1045	Feb. 19, 2023, 1:02 p.m.
Syca	https://cyrihack.fr	1385	April 6, 2023, 5:29 p.m.
asarandi	https://github.com/asarandi	1965	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	1595	Sept. 27, 2023, 11:50 a.m.
albaud	https://github.com/Gymnopediese	675	Oct. 13, 2023, 12:34 p.m.
Ardcord		835	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	1875	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	680	March 23, 2025, 12:18 a.m.
ikkiw		1085	May 23, 2025, 1:45 p.m.