Serpent Online Encryption/Decryption

AES finalist algorithm - Ultra-secure block cipher supporting 128/192/256-bit keys

Performance Note

Since Serpent has 32 rounds while AES only has 10-14 rounds, Serpent is slower than AES. For performance-critical applications, consider using AES. Choose Serpent when maximum security margin is your priority.

Key Features

128-bit block size: Same as AES, processes data in 16-byte units
32 rounds of encryption: More rounds than AES (10-14), providing higher security margin

Encryption Mode Description

Padding

Serpent key length: 128/192/256 bits. 128-bit block. Highest security margin among AES finalists.

Encryption Key

Initialization Vector (IV) (128 bit / 16 bytes)

Format Options

Plaintext Input Format

Ciphertext Output Format

Input Text

Documentation

This tool performs local Serpent block-cipher encryption/decryption with selectable key sizes, common modes, and encoding formats.

Key Features

Serpent with 128/192/256-bit keys
CBC, ECB, CFB, OFB, and RAW modes
Multiple input/output formats and paddings
Key/IV length validation checks

Steps

Select encrypt/decrypt and key size.
Configure mode, padding, and encodings.
Enter key, IV, and text input.
Run and copy the output.

Notes

Serpent is highly secure but often slower than AES.
Valid IV is required for non-ECB modes.
Parameter mismatch causes decryption incompatibility.

Related Tools

Documentation

Key Features

Steps

Notes