DES Processor
Result
Symmetric-Key Cipher
DES uses the same 56-bit key for both encrypting and decrypting data, a hallmark of symmetric algorithms.
Block-Based Encryption
It operates on data in fixed-size blocks of 64 bits, processing each block through its cryptographic functions.
16-Round Feistel Network
The core of DES is a 16-round Feistel structure that repeatedly applies substitution and permutation to the data.
Influential Legacy
Though now insecure for modern use, DES was a U.S. government standard and heavily influenced the evolution of cryptography.
Complex Transformations
Each round uses a subkey to perform complex permutations (P-Boxes) and substitutions (S-Boxes) to ensure confusion and diffusion.
Legacy System Support
While superseded by AES, DES and its variant Triple DES are still found in some legacy financial and hardware systems.
About DES
The Data Encryption Standard (DES) is a symmetric-key block cipher developed by IBM in the 1970s and was adopted as a United States federal standard in 1977. It works by encrypting data in 64-bit blocks using a 56-bit key.
The algorithm's core is a Feistel network which performs 16 rounds of complex operations, including permutations and substitutions, on each block of data. For decryption, the same algorithm is used, but the round keys are applied in the reverse order. Due to its relatively short key length, DES is now considered vulnerable to modern brute-force attacks and has largely been replaced by the Advanced Encryption Standard (AES).
How to Use
- Enter Data: Type or paste the text you want to encrypt. If decrypting, paste the Base64-encoded ciphertext.
- Provide Key: Enter an 8-character (64-bit) secret key. This same key must be used for both encryption and decryption.
- Select Operation: Choose whether to "Encrypt" or "Decrypt" from the dropdown menu.
- Process: Click the "Process" button to perform the cryptographic operation via an API call.
- View and Copy Result: The result will appear in the output box below. Use the "Copy to Clipboard" button for easy access.