The encryption process in the XTEA algorithm is done by taking each plaintext per 8 byte block and breaking it into odd and even rounds. An example of encryption in the XTEA algorithm, if it is known that the key is 16 bytes long and plaintext will be used for encryption with 16 bytes.
XTEA (eXtended TEA) is a symmetric block cipher algorithm designed for secure data encryption. It operates on fixed-size blocks of data, typically 64 bits, and uses a 128-bit key. The encryption process involves breaking the plaintext into 8-byte blocks and applying a series of operations through multiple rounds.
In each round of XTEA, the plaintext undergoes alternating odd and even rounds, where a set of mathematical operations, including bitwise addition and bitwise XOR, are applied to enhance the security of the encryption. The number of rounds directly correlates with the strength of the algorithm, and XTEA typically employs 64 rounds to ensure robust security.
An illustrative example involves encrypting a 16-byte plaintext with a 16-byte key. XTEA's reliance on fixed-size blocks and a key length of 128 bits contributes to its efficiency and simplicity. The algorithm exhibits a good balance between speed and security, making it suitable for various applications, such as embedded systems and resource-constrained environments. However, it is essential to manage key distribution securely to maintain the overall effectiveness of XTEA in safeguarding sensitive data.
Step 1: generate key
val keyInBytes = XTEA.getFormattedKey("YourKey")
Step 2: Encrypt any file or String with key
val encryptedData = XTEA.encryptXTEA("fileOrStringInBytes".toByteArray() , keyInBytes)
Step 3: Decrypt data with same key
val decryptedData = XTEA.decryptXTEA(encryptedData , keyInBytes)
print(decryptedData)