What is the key size in bits for the Chaskey cipher?

The Chaskey cipher, which is designed for lightweight cryptography, utilizes a key size of 128 bits. This size provides a balance between security and efficiency, making it suitable for resource-constrained environments like IoT devices. Key sizes are critical in cryptography, as they determine the level of security against brute-force attacks; a 128-bit key is generally considered secure against current computational capabilities.

In the context of cryptographic algorithms, many modern ciphers, such as AES, also employ a 128-bit key, which contributes to its widespread use and acceptance in various security applications. The choice of 128 bits for the key size in Chaskey reflects contemporary standards, prioritizing both strength and performance.