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Encrypt and decrypt text with the RC2 block cipher (RFC 2268) in CBC mode. Ciphertext is hex. Everything runs in your browser.
RC2 is a 64-bit block cipher designed by Ron Rivest (RFC 2268), once common in S/MIME and older PKCS#12 files. The key and IV are entered as hex and the effective key size is 128 bits, matching the defaults of OpenSSL and CyberChef. It is legacy; use AES for new work. The same key and IV are needed to decrypt.
Encrypt and decrypt text with the RC2 block cipher (RFC 2268) in CBC mode. Hex output. Runs entirely in your browser.
RC2 is a 64-bit block cipher designed by Ron Rivest in 1987 and published as RFC 2268. It was widely used in S/MIME email and is still seen inside older PKCS#12 (.pfx) files and legacy Microsoft formats. This tool encrypts and decrypts text with RC2 in CBC mode.
Input:
Plaintext + key (hex) + IV (16 hex chars)
Output:
hex ciphertext
Where is RC2 still found?
In older S/MIME messages and in PKCS#12 files exported by legacy tools, which often use RC2-40 or RC2-128 for the encrypted bags.
What is the IV for?
CBC mode chains blocks using an 8-byte initialization vector. The same IV used to encrypt is required to decrypt.
Is RC2 secure?
No. It is legacy and weak by modern standards, especially with small effective key sizes. Use AES for new work.
Does my data leave the browser?
No. It is processed locally in your browser.