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8 kyu
easiest
7 kyu
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5 kyu
4 kyu
3 kyu
2 kyu
1 kyu
hardest
Algorithms
20
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2
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1
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12
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12
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6
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1
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20
Strings
20
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
20 Kata Found
7 kyu
Mirroring cipher
832
user8580805
Strings
Cryptography
Security
Algorithms
5 kyu
Simple Encryption #3 - Turn The Bits Around
269
user5036852
Cryptography
Security
Strings
Algorithms
Bits
5 kyu
Simple Encryption #4 - Qwerty
794
user5036852
Cryptography
Security
Strings
Algorithms
5 kyu
Simple Encryption #2 - Index-Difference
876
user5036852
Fundamentals
Cryptography
Security
Strings
Arrays
Algorithms
4 kyu
Vigenère Cipher Helper
8,700
jacobb
6 Issues Reported
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
3 kyu
Rail Fence Cipher: Encoding and Decoding
9,036
darrentburgess
3 Issues Reported
Algorithms
Ciphers
Cryptography
Strings
Security
6 kyu
Encrypt this!
23,547
suic
Fundamentals
Strings
Regular Expressions
Arrays
Ciphers
Algorithms
Cryptography
Security
7 kyu
Tap Code Translation
1,921
The-Kingfisher
Algorithms
Strings
Cryptography
Security
Beta
Cracking Vigenère: unknown language
7
jharris3791
3 Issues Reported
Status:
Testing & feedback needed
Estimated Rank:
3 kyu
Puzzles
Strings
Ciphers
Algorithms
Cryptography
Security
5 kyu
A Scandal in Bohemia
121
rge123
Ciphers
Cryptography
Security
Strings
Algorithms
Beta
Cracking the digital hash lock
7
dramforever
1 Issue Reported
Status:
Waiting for issues to be resolved
Estimated Rank:
4 kyu
Performance
Strings
Algorithms
Security
Mathematics
Language Features
Beta
Bob's Secret Cipher
13
B1ts
Status:
Testing & feedback needed
Estimated Rank:
6 kyu
Ciphers
Algorithms
Cryptography
Security
Strings
Puzzles
7 kyu
anti-virus file scanner
206
wayne1512
Algorithms
Strings
Security
Regular Expressions
6 kyu
Simple Substitution Cipher Helper
3,682
jacobb
Ciphers
Security
Object-oriented Programming
Strings
Algorithms
6 kyu
Atbash Cipher Helper
649
jacobb
3 Issues Reported
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
6 kyu
ROT13 variant cipher
659
user8580805
1 Issue Reported
Cryptography
Security
Strings
Algorithms
Beta
Playfair cipher
7
durfi
1 Issue Reported
Status:
Testing & feedback needed
Estimated Rank:
4 kyu
Ciphers
Cryptography
Security
Strings
Algorithms
6 kyu
Kama Sutra Cipher Helper
275
jacobb
Ciphers
Security
Object-oriented Programming
Strings
Algorithms
5 kyu
Affine Cipher Helper
98
jacobb
1 Issue Reported
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
5 kyu
Vigenère Autokey Cipher Helper
1,228
jacobb
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
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