XOR Toolkit

XOR encryption/decryption with repeating key support.

Key

Key Format

Input Format

Output Format

Input Data

Result

Usage

Algorithm Principle

Exclusive OR (XOR) is one of the most commonly used bitwise operations in computer science. Reversibility: if A XOR B = C, then C XOR B = A, so encryption and decryption use the exact same algorithm; Simple encryption: XORs data byte-by-byte with a key, cycling the key if it is shorter than the data; Security: simple XOR encryption (especially with short or repeating keys) is insecure and vulnerable to frequency analysis; only when the key is truly random, as long as the plaintext, and used only once (one-time pad OTP) is it theoretically unbreakable.

Steps

1. Enter the data to process and the key; 2. Select input format (Text/Hex/Base64) and output format; 3. Click "Execute" to get the result; 4. Apply the same operation again (with the same key) to restore the data.

Notes

XOR encryption is only suitable for simple scenarios, not for security-sensitive use; Hex input must be of even length and contain only 0-9, a-f, A-F; Base64 input must be in standard Base64 format; the operation cannot proceed without a key; repeating-key encryption offers no protection against known-plaintext attacks.