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	765	Jan. 4, 2020, 3:57 a.m.
Danhia		360	Jan. 4, 2020, 12:22 p.m.
antox	https://www.w0nderland.fr	180	June 13, 2020, 11:50 a.m.
Unactive		430	Jan. 25, 2021, 2:10 p.m.
arpascal	https://arnaud.sh	1525	Jan. 27, 2021, 10:49 p.m.
molivier		475	April 17, 2021, 2:53 a.m.
Yir		840	Oct. 17, 2021, 9:38 p.m.
42stillsucks	https://www.youtube.com/watch?v=hfTAv8htci8	980	Oct. 29, 2021, 9:28 p.m.
00101010		910	Dec. 24, 2021, 4:27 p.m.
lmartin		980	March 8, 2022, 5:45 p.m.
nieyraud		795	March 8, 2022, 5:47 p.m.
S_in	https://twitter.com/sin_infosec	820	March 9, 2022, 11:48 p.m.
clinche	https://github.com/clinche	1710	March 17, 2022, 12:45 p.m.
tpeters		155	June 12, 2022, 1:16 p.m.
Nyr		180	Oct. 16, 2022, 3:11 p.m.
riblanc		1155	Feb. 19, 2023, 1:02 p.m.
Syca	https://cyrihack.fr	1225	April 6, 2023, 5:29 p.m.
asarandi	https://github.com/asarandi	1710	May 23, 2023, 12:30 a.m.
Nics		100	June 2, 2023, 1:03 p.m.
eclypse666		485	Aug. 31, 2023, 10:39 p.m.
hsabir-xoreaxeax	https://github.com/lenartlola	1405	Sept. 27, 2023, 11:50 a.m.
albaud	https://github.com/Gymnopediese	595	Oct. 13, 2023, 12:34 p.m.
Ardcord		1155	Oct. 22, 2023, 11:09 a.m.
Narmand		95	Nov. 14, 2023, 5:20 p.m.
Nochance		115	Nov. 17, 2023, 6 p.m.
MinjaeLee	https://github.com/MinjeaLee	1625	Sept. 26, 2024, 10:56 a.m.
BenJ4368		140	Nov. 15, 2024, 1:36 p.m.
a8ymgi01w@mozmail.com		145	Nov. 15, 2024, 1:36 p.m.
chabrune		85	Nov. 15, 2024, 1:43 p.m.
UncleReaton	https://unclereaton.dev	650	March 23, 2025, 12:18 a.m.
ikkiw		950	May 23, 2025, 1:45 p.m.
altaubee	https://github.com/taubeskiceh	105	Aug. 17, 2025, 11:56 p.m.
Dueshell		415	Dec. 10, 2025, 7:09 p.m.
bouliboula		520	Dec. 11, 2025, 9:50 a.m.
skav	https://www.logogenie.fr	1670	Jan. 7, 2026, 8:37 a.m.
paulo-do		210	March 5, 2026, 2:04 a.m.
timatias	https://github.com/tiagomatias930/tiagomatias930	835	March 22, 2026, 4:12 a.m.
Aoniii	https://github.com/Aoniii	1000	April 3, 2026, 2:36 p.m.