AES, also known as Rijndael, is a symmetric encryption algorithm designed by Belgian cryptographers Joan Daemen and Vincent Rijmen
Note: AES block length is 128 bits, so IV length must be 16 characters (ECB mode doesn't use IV). Key length should be 16, 24, or 32 characters based on selected key size. Keys and IVs that are too long will be truncated, and those too short will be padded with '\0'.
About AES Encryption
AES (Advanced Encryption Standard) is a symmetric encryption algorithm widely used for protecting sensitive data. It supports key lengths of 128, 192, and 256 bits, with 256-bit providing the highest security.
Encryption Modes
Different encryption modes offer various security and performance characteristics:
ECB (Electronic Codebook) - Simplest mode but not recommended for sensitive data
CBC (Cipher Block Chaining) - More secure, requires IV
CFB (Cipher Feedback) - Converts block cipher into stream cipher
OFB (Output Feedback) - Similar to CFB but with different feedback mechanism
Padding Options
Padding is used to ensure the input data length is a multiple of the block size:
PKCS7 - Most commonly used padding scheme
ANSI X.923 - Similar to PKCS7 but with different padding value
ISO 10126 - Uses random bytes for padding
Zero Padding - Fills with zeros (not recommended for binary data)
No Padding - No padding (input must be a multiple of block size)
Security Best Practices
Always use strong, random keys
Use CBC, CFB, or OFB modes instead of ECB
Use a unique IV for each encryption operation
Keep your keys secure and never share them
Consider using authenticated encryption (like AES-GCM) for sensitive data
Secure and Free AES Encryption
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