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Writeups

ECECDSA
Official Writeup
crypto
avatar
Dreamhack
20 coin
stroooooooong-hash
Official Writeup
crypto
avatar
Dreamhack
20 coin
Simple Permutation Network
Official Writeup
crypto
avatar
Dreamhack
20 coin

Ranking

194 players are participating.
Last updated: 2026.02.19. 14:46:48
Rank Score User
#1 2417 pts
shpark1104
#2 2417 pts
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Ivy
#3 2417 pts
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ks
#4 1442 pts
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zatsu
#5 1442 pts
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Yu_212
#6 1429 pts
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soon_haari
#7 1429 pts
Onirique
#8 1429 pts
Zayn
#9 1429 pts
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hakid29
#10 454 pts
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keymoon
#11 454 pts
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1s0m0rph1sm
#12 454 pts
r_jh0213
#13 454 pts
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Nola
#14 454 pts
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qpal
#15 454 pts
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jjong22

Result

User
LP
Tier changed to
shpark1104
1980
143
Platinum II
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Ivy
1624
Gold II
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ks
1928
312
Platinum II
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zatsu
2100
92
Diamond III
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Yu_212
2096
70
Platinum I
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soon_haari
1345
178
Silver II
Onirique
1408
257
Silver I
Zayn
1607
207
Gold II
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hakid29
1459
228
Silver I
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keymoon
2288
-46
Diamond II
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1s0m0rph1sm
1569
Gold III
r_jh0213
1456
141
Silver I
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Nola
1811
87
Platinum III
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qpal
1674
177
Gold II
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jjong22
1511
156
Gold III
csh22101
1344
132
Silver II
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Malosdaf
1536
Gold III
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himeowster
1532
Gold III
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hiikunZ
1868
46
Platinum III
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Gureisya
1522
Gold III
드림이는f149를좋아해
1694
69
Gold II
nisinsoba
1513
Gold III
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c0degolf
1500
139
Gold III
n0ha
1573
100
Gold III
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jitensha69
1677
121
Gold II
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웅머
1496
Silver I
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h34hg0
1492
129
Silver I
avatar
희비
1487
Silver I
boo______
1830
0 NEW
Platinum III
수지
1432
273
Silver I
Season 6
Dreamhack CTF Season 6 Round #6 (Crypto)
Date
2024.08.31. 00:00:00
~ 2024.09.01. 23:59:59
192 participated
Organized by
Dreamhack
Time
2 days
Team size
Individual
Description

Dreamhack CTF Season 6 #6 <Why would you talk about breaking up during a CTF?>

What? Break up? Now? ...I'm in the middle of a CTF!

The competition will be held from 00:00 on Saturday, August 31, 2024, for 48 hours (UTC+9).

There will be three cryptography challenges with different difficulty levels: easy (A), medium (B), and hard (C)!

If you're confident in your skills, challenge yourself with the harder challenges. If you want to practice more, try starting with the easier ones!

Dreamhack CTF is a regularly held competition.

Inquries

Rules
  1. Sharing answers or solution methods among CTF participants is strictly forbidden and may result in disqualification.
  2. CTF participants must only access and attack the designated target servers.
  3. Any actions or attempts that could impact the operation of Dreamhack or the CTF servers, or disrupt the smooth conduct of the event, may also result in disqualification.
  4. During the competition, participants must not share the challenge files with anyone else.
Rewards
  • Dreamhack Mug
    • 1 CTF Winner
    • 2 Lucky Draws (Min. 1 solve required)
Scoring

Score of each challenge is adjusted based on the number of solvers.

Flag Format

The flag format is DH{...}.

Flag Submission Threshold
Flags can be submitted once every 30 seconds per challenge.