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	910	Jan. 4, 2020, 3:57 a.m.
Danhia		415	Jan. 4, 2020, 12:22 p.m.
antox	https://www.w0nderland.fr	210	June 13, 2020, 11:50 a.m.
Unactive		490	Jan. 25, 2021, 2:10 p.m.
arpascal	https://arnaud.sh	1800	Jan. 27, 2021, 10:49 p.m.
molivier		545	April 17, 2021, 2:53 a.m.
Yir		985	Oct. 17, 2021, 9:38 p.m.
42stillsucks	https://www.youtube.com/watch?v=hfTAv8htci8	1145	Oct. 29, 2021, 9:28 p.m.
00101010		1090	Dec. 24, 2021, 4:27 p.m.
lmartin		1145	March 8, 2022, 5:45 p.m.
nieyraud		940	March 8, 2022, 5:47 p.m.
S_in	https://twitter.com/sin_infosec	965	March 9, 2022, 11:48 p.m.
clinche	https://github.com/clinche	1050	March 17, 2022, 12:45 p.m.
tpeters		175	June 12, 2022, 1:16 p.m.
Nyr		200	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	2030	May 23, 2023, 12:30 a.m.
Nics		115	June 2, 2023, 1:03 p.m.
eclypse666		550	Aug. 31, 2023, 10:39 p.m.
hsabir-xoreaxeax	https://github.com/lenartlola	1660	Sept. 27, 2023, 11:50 a.m.
albaud	https://github.com/Gymnopediese	710	Oct. 13, 2023, 12:34 p.m.
Ardcord		875	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	1940	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	710	March 23, 2025, 12:18 a.m.
ikkiw		1135	May 23, 2025, 1:45 p.m.