Encrypt and decrypt text using various cipher methods including Caesar cipher, ROT13, Base64, and custom substitution
These are simple ciphers for learning. Don't use them for actual security - use modern encryption instead.
Easily broken with frequency analysis. Used by Julius Caesar but not secure by modern standards.
For actual security, use AES, RSA, or other cryptographically secure algorithms.
Great for understanding basic encryption concepts and practicing cryptanalysis techniques.
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