3DES Encrypt

Encrypt or decrypt text with Triple DES in CBC mode.

Passphrase

Plaintext

Note: 3DES (Triple DES) runs DES three times in an encrypt-decrypt-encrypt chain with a 24-byte key derived from your passphrase via SHA-256. Output format is iv:ciphertext hex. 3DES is legacy — prefer AES for new systems.

What Is a 3DES Encrypt?

The 3DES Encrypt tool encrypts and decrypts text with Triple DES (3DES) in CBC mode. 3DES runs DES three times in an encrypt-decrypt-encrypt chain using a 24-byte key, giving stronger security than single DES.

How to Use This 3DES Encrypt

1
Enter PassphraseType a passphrase; SHA-256 derives the 24-byte key.
2
Enter TextType plaintext to encrypt, or paste iv:ciphertext hex to decrypt.
3
Choose DirectionClick 3DES Encrypt or 3DES Decrypt.

Frequently Asked Questions

Its 64-bit block size makes it vulnerable to Sweet32 birthday attacks at high volumes, and DES is slow in software. NIST deprecated 3DES; AES is the recommended replacement.

A random 8-byte IV followed by the ciphertext, joined as iv:ciphertext in lowercase hex. The IV is required for decryption.

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