CAMELLIA-128-ECB 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-ECB algorithm is a symmetric key block cipher that operates on 128-bit blocks using a 128-bit secret key. It is part of the Camellia family of ciphers designed for high security and efficiency in both hardware and software implementations. The algorithm is recognized for its strong cryptographic properties, including resistance to differential and linear cryptanalysis, and it provides confidentiality without any inherent authentication mechanisms.
Key Schedule
Camellia-128-ECB uses a key schedule to expand the 128-bit key into multiple round keys. The key schedule involves splitting the key into two 64-bit halves and applying a series of rotations and fixed constant additions. The expanded keys are then used in a sequence of rounds, ensuring that each round operates with unique subkeys derived from the original key.
Encryption Process
Encryption proceeds in several stages. Initially, the 128-bit plaintext block undergoes an input whitening step where it is XORed with the first subkey. The core of the algorithm consists of 18 rounds of Feistel-like transformations, which include substitution operations using S-boxes, linear transformations using diffusion matrices, and key mixing. After the rounds, a final output whitening step is performed using additional subkeys, producing the 128-bit ciphertext block. In ECB mode, each block is encrypted independently, which means identical plaintext blocks yield identical ciphertext blocks.
Decryption Process
Decryption is structurally identical to encryption but applies the round keys in reverse order. This ensures that the original plaintext can be recovered from the ciphertext without loss of information. All operations, including S-box substitution and linear transformations, are inverted to achieve accurate decryption.
Security Considerations
Camellia-128-ECB provides strong resistance against known cryptanalytic attacks when used with unique keys and proper block handling. However, the ECB mode itself does not provide semantic security for repeated plaintext patterns, and care must be taken when encrypting multiple blocks. Padding schemes are required for plaintexts not aligned to 128-bit boundaries. The algorithm is standardized under ISO/IEC and widely accepted for secure communications in software and hardware systems.
Performance and Applications
The algorithm is efficient for both software and hardware implementations due to its simple structure and parallelizable operations. Camellia-128-ECB is suitable for encrypting small amounts of data, key storage, or legacy systems where block independence is acceptable. For stronger security in data streams, it is recommended to use modes such as CBC or GCM instead of ECB.