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About yudai

Usernameyudai
CountryJapan
Member since2015-07-02
Coins0
Points275
Write-up with special mention0
Ranking207 / 48884
Challenges completed99 / 391

Challenge Write-up with special mention
Validation date Challenge Number of points
2018-12-21 05:14:52
SQL Injection
Random Login Form
2
2017-10-01 22:52:57
Reverse Engineering
Intro To Sparc
3
2017-04-23 09:32:51
Jail Escaping
C Jail 1
1
2017-02-28 21:43:16
Web
PHP Fairy
2
2016-12-06 23:41:33
Web
Propaganda mail
4
2016-12-02 10:24:53
Web
PHP feature or 0day?
3
2016-12-02 07:38:00
Web
Area 51
1
2016-12-02 07:30:12
SQL Injection
Login portal 1
2
2016-12-02 07:27:06
Steganography
Love Letter
3
2016-12-02 07:20:06
Steganography
You're lost? Use the map
1
2016-12-01 07:33:15
Forensics
We got breached
5
2016-08-06 23:32:04
Jail Escaping
Bash Jail 3
3
2016-08-06 23:26:31
Jail Escaping
Bash Jail 2
2
2016-08-06 23:13:19
Jail Escaping
Bash Jail 1
1
2016-08-06 22:52:40
Jail Escaping
PHP Jail 4
4
2016-08-06 22:21:52
Jail Escaping
PHP Jail 3
3
2016-08-06 21:44:43
Jail Escaping
PHP Jail 2
2
2016-08-06 21:28:02
Jail Escaping
PHP Jail 1
1
2016-08-06 20:10:00
Pwnage Linux
Can you get the service password
4
2016-08-06 11:44:07
SysAdmin Linux
SysAdmin Part 4
2
2016-08-06 11:04:49
SysAdmin Linux
SysAdmin Part 3
1
2016-08-06 10:54:49
SysAdmin Linux
SysAdmin Part 2
1
2016-08-06 10:51:28
SysAdmin Linux
SysAdmin Part 1
1
2016-07-19 22:17:51
JavaScript
Valid key required
2
2016-07-15 00:52:57
Coding Challenges
Ask your grandpa!
2
2016-07-10 21:23:51
Steganography
Pixel Everywhere
2
2016-07-07 10:17:31
Steganography
Your old friend Orloge Simard
3
2016-07-07 10:04:14
Steganography
A ghost sound
2
2016-07-07 09:56:55
Software Defined Radio
SigID Level 1
1
2016-06-04 04:12:32
Steganography
I'm Goronyo Babad Nigerian prince
2
2016-06-03 23:24:48
Cryptography
Hangovers and more: Bacon
3
2016-06-03 22:56:04
Forensics
Someone steal my flag!
3
2016-05-21 21:48:04
Web
Serial killer!
3
2016-01-15 08:00:58
Coding Challenges
Hash breaker reloaded
5
2016-01-15 07:48:14
Coding Challenges
I saw a little elf
4
2016-01-15 04:39:43
Cryptography
Is it a secure string?
5
2016-01-14 05:48:16
Cryptography
Crypto over the network
4
2016-01-14 00:23:08
Forensics
Who I am?
2
2016-01-14 00:18:58
Cryptography
Encrypted Zip
4
2016-01-11 08:05:29
Steganography
Hidden In Plain Sight
2
2016-01-11 05:15:40
Web
Captcha I
2
2016-01-10 21:55:45
Coding Challenges
Execute me if you can
5
2016-01-10 10:46:37
Coding Challenges
Read me if you can
6
2016-01-10 08:46:24
Coding Challenges
Xor me if you can
6
2016-01-10 08:30:26
Coding Challenges
Ascii Art
6
2016-01-10 08:02:11
Coding Challenges
Hash breaker
4
2016-01-10 07:56:01
Coding Challenges
I hate mathematics
3
2016-01-10 07:49:04
Coding Challenges
Hash me reloaded
3
2016-01-10 07:40:24
Coding Challenges
Hash me please
2
2016-01-10 07:06:28
Web
Big Brother is watching
1
2015-09-27 22:30:34
Cryptography
Can you understand this sentence?
3
2015-09-27 22:23:18
Forensics
3 / 3 Suspicious account password?
4
2015-09-27 22:14:44
Forensics
2 / 3 Did you see my desktop?
3
2015-09-27 22:06:51
Forensics
1 / 3 Do not waste the environment
2
2015-09-26 00:08:57
Forensics
Poor internet connection
4
2015-09-25 22:59:00
Forensics
Hey Chuck where is the flag?
2
2015-09-25 21:31:41
Malware Analysis
Capture 1 Part 1
1
2015-08-26 22:36:27
Pwnage Linux
Level1 Pwnage Linux Level Up
1
2015-08-22 09:41:52
Shellcoding
Linux x64 shellcoding level 6
12
2015-08-10 05:48:48
Steganography
Victor reloaded
2
2015-08-08 22:52:05
Shellcoding
Linux x64 shellcoding level 5
10
2015-08-08 02:34:38
Cryptography
I Lost my password
3
2015-08-08 02:14:01
Cryptography
Public key recovery
2
2015-08-08 01:34:26
Reverse Engineering
Can you see through the star
2
2015-08-07 10:00:19
SQL Injection
Quote of the day
4
2015-08-07 09:38:10
SQL Injection
Thinking outside the box is the key
4
2015-08-07 06:18:26
Forensics
Attention Dinosaure Survive
2
2015-08-07 05:33:49
Reverse Engineering
Wrong byte!
4
2015-08-07 05:29:34
Reverse Engineering
I never forget the Nintendo 64
3
2015-08-06 10:16:14
Web
Words mean something?
1
2015-08-05 10:42:20
Shellcoding
Linux x64 shellcoding level 4
8
2015-08-04 08:19:50
Shellcoding
Linux x64 shellcoding level 3
6
2015-08-04 05:51:45
Forensics
Hide my ass in my home!
2
2015-08-02 05:28:55
Shellcoding
Linux x64 shellcoding level 2
4
2015-08-01 22:48:27
Shellcoding
Basics of Linux x64 shellcoding
2
2015-07-25 09:20:50
Web
Security thru obscurity!
2
2015-07-19 00:10:17
Reverse Engineering
Time to learn x86 ASM & gdb
2
2015-07-18 23:09:11
Reverse Engineering
Crack Me 1
3
2015-07-18 22:57:43
Reverse Engineering
Windows API for the win
4
2015-07-18 22:28:51
Reverse Engineering
Windows x86 reversing is cool
3
2015-07-18 10:52:26
Web
Headache
1
2015-07-18 10:35:05
Web
Looking for the flag?
3
2015-07-18 10:09:00
Cryptography
Martian message part 3
3
2015-07-18 09:54:57
Cryptography
Martian message part 2
2
2015-07-18 09:48:24
Exotic Data Storage
Just another login form
2
2015-07-18 09:46:15
SQL Injection
Po po po po postgresql
2
2015-07-04 04:04:04
Steganography
Victor you're hidding me something
1
2015-07-04 03:02:41
Cryptography
Some martian message
1
2015-07-04 02:52:11
Forensics
Dr. Pouce
2
2015-07-03 09:03:17
JavaScript
Then obfuscation is more secure
1
2015-07-03 05:00:01
Web
Facebook will never forget this one
3
2015-07-02 10:27:06
JavaScript
Why not?
2
2015-07-02 10:22:37
JavaScript
Hashing is more secure
1
2015-07-02 10:21:23
JavaScript
Client side validation is bad!
1
2015-07-02 07:19:43
Web
Looking for password file
1
2015-07-02 05:38:03
Cryptography
File recovery
1
2015-07-02 04:38:49
Forensics
I made a dd of Agent Smith usb key
1
2015-07-02 04:18:12
SQL Injection
ACL rulezzz the world.
2
2015-07-02 04:10:19
SQL Injection
Most basic SQLi pattern.
1
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