CAMELLIA-128-CBC-CTS ENCRYPTION TOOL
Other Crypto Algorithms
AES-128-CBC AES-128-CBC-CTS AES-128-CBC-HMAC-SHA1 AES-128-CBC-HMAC-SHA256 AES-128-CCM AES-128-CFB AES-128-CFB1 AES-128-CFB8 AES-128-CTR AES-128-ECB AES-128-GCM AES-128-GCM-SIV AES-128-OCB AES-128-OFB AES-128-SIV AES-128-WRAP AES-128-WRAP-INV AES-128-WRAP-PAD AES-128-WRAP-PAD-INV AES-128-XTS AES-192-CBC AES-192-CBC-CTS AES-192-CCM AES-192-CFB AES-192-CFB1 AES-192-CFB8 AES-192-CTR AES-192-ECB AES-192-GCM AES-192-GCM-SIV AES-192-OCB AES-192-OFB AES-192-SIV AES-192-WRAP AES-192-WRAP-INV AES-192-WRAP-PAD AES-192-WRAP-PAD-INV AES-256-CBC AES-256-CBC-CTS AES-256-CBC-HMAC-SHA1 AES-256-CBC-HMAC-SHA256 AES-256-CCM AES-256-CFB AES-256-CFB1 AES-256-CFB8 AES-256-CTR AES-256-ECB AES-256-GCM AES-256-GCM-SIV AES-256-OCB AES-256-OFB AES-256-SIV AES-256-WRAP AES-256-WRAP-INV AES-256-WRAP-PAD AES-256-WRAP-PAD-INV AES-256-XTS ARIA-128-CBC ARIA-128-CCM ARIA-128-CFB ARIA-128-CFB1 ARIA-128-CFB8 ARIA-128-CTR ARIA-128-ECB ARIA-128-GCM ARIA-128-OFB ARIA-192-CBC ARIA-192-CCM ARIA-192-CFB ARIA-192-CFB1 ARIA-192-CFB8 ARIA-192-CTR ARIA-192-ECB ARIA-192-GCM ARIA-192-OFB ARIA-256-CBC ARIA-256-CCM ARIA-256-CFB ARIA-256-CFB1 ARIA-256-CFB8 ARIA-256-CTR ARIA-256-ECB ARIA-256-GCM ARIA-256-OFB CAMELLIA-128-CBC CAMELLIA-128-CBC-CTS CAMELLIA-128-CFB CAMELLIA-128-CFB1 CAMELLIA-128-CFB8 CAMELLIA-128-CTR CAMELLIA-128-ECB CAMELLIA-128-OFB CAMELLIA-192-CBC CAMELLIA-192-CBC-CTS CAMELLIA-192-CFB CAMELLIA-192-CFB1 CAMELLIA-192-CFB8 CAMELLIA-192-CTR CAMELLIA-192-ECB CAMELLIA-192-OFB CAMELLIA-256-CBC CAMELLIA-256-CBC-CTS CAMELLIA-256-CFB CAMELLIA-256-CFB1 CAMELLIA-256-CFB8 CAMELLIA-256-CTR CAMELLIA-256-ECB CAMELLIA-256-OFB CHACHA20 CHACHA20-POLY1305 DES-EDE-CBC DES-EDE-CFB DES-EDE-ECB DES-EDE-OFB DES-EDE3-CBC DES-EDE3-CFB DES-EDE3-CFB1 DES-EDE3-CFB8 DES-EDE3-ECB DES-EDE3-OFB DES3-WRAPThe Camellia-128-CBC-CTS algorithm is a symmetric key block cipher operating on 128-bit blocks with a key length of 128 bits. It is part of the Camellia family of ciphers designed to provide strong security equivalent to that of AES. The algorithm combines the CBC (Cipher Block Chaining) mode with CTS (Ciphertext Stealing) to handle plaintexts that are not exact multiples of the block size.
Block Cipher Structure
Camellia uses a Feistel network structure with 18 rounds for a 128-bit key. Each round applies substitution boxes (S-boxes), linear transformations, and key-dependent rotations to ensure diffusion and confusion. The algorithm also incorporates key whitening before and after the rounds, XORing the plaintext and ciphertext with derived subkeys to increase resistance against cryptanalysis.
CBC Mode Operation
In CBC mode, each plaintext block is XORed with the previous ciphertext block before encryption. The first plaintext block is XORed with an initialization vector (IV). This chaining process ensures that identical plaintext blocks produce different ciphertexts, enhancing security by providing semantic security and preventing pattern leakage.
Ciphertext Stealing
CTS is used to encrypt messages whose length is not a multiple of the block size without padding. The final two plaintext blocks are combined in a specific manner to produce a ciphertext of the same length as the original message. This preserves data length while allowing the use of a block cipher in CBC mode without adding padding bytes that may reveal information about the plaintext length.
Key Schedule
The key schedule generates subkeys used in each round and in the whitening steps. The 128-bit key is expanded into multiple round keys using fixed rotations, XOR operations, and non-linear functions. This ensures that each round operates with a distinct key, contributing to overall cipher strength.
Security Properties
Camellia-128-CBC-CTS provides confidentiality through the combination of the Feistel-based Camellia cipher and CBC mode. CTS maintains exact-length ciphertexts for arbitrary-length messages, making it suitable for protocols and storage systems requiring precise data size preservation. The algorithm is resistant to linear and differential cryptanalysis under proper key management.
Applications
This algorithm is suitable for secure communication systems, file encryption, and cryptographic protocols where 128-bit security is required. The combination of CBC and CTS allows integration into environments where message lengths vary without sacrificing security.