LTKs

LTKs, or Long Term Keys, are cryptographic keys used in various security protocols to establish secure communications over extended periods. They are designed to be used for a long time, often years, without the need for frequent re-keying. LTKs are typically generated using a secure random number generator and are stored securely to prevent unauthorized access. They are used in Bluetooth Low Energy (BLE) technology to encrypt the communication between devices. The generation and distribution of LTKs are crucial for maintaining the security of the communication channel. The security of LTKs relies on their length and the strength of the algorithm used to generate them. In the context of BLE, LTKs are 128 bits long, providing a high level of security against brute-force attacks. The use of LTKs is a fundamental aspect of modern cryptographic protocols, enabling secure and reliable communication in various applications.