Theory and experiments show that the use of fixed key will debase the security of stochastic modulation. 理论和实验表明,固定隐写密钥的使用会降低随机调制算法的安全性。
It is found that all these protocols have same design problem which the tag key cannot be updated. This means that once the fixed key is leaked, the communication and interaction between RF components would be no longer secure. 通过研究发现:这几类协议都存在密钥无法更新的设计问题,即固定密钥一旦泄漏,射频组件间的通信和交互访问将不再安全。
This approach in which encryption of the data is realized by a model of AES computed with a fixed key and a variable key. And using rolling synchronization code to ensure that each transmission of data is different. Followed by an analysis of the security agreement. 协议采用一个固定密钥和一个动态密钥的AES加密来保证传输数据的安全性,利用同步码滚动来保证每次传输数据的不同。
An improved traitor tracing scheme based on modified RSA is proposed, which solves the existing scheme's problem of fixed session key by introducing a random number with its security improved. 提出了一种改进的叛逆者追踪方案,通过引入一个随机数解决了现有方案中存在的会话密钥固定不变的问题,使其安全性得到了提高。
When the passing moment is high, it is fixed by open key way by machinery. 传递的力矩较大时,采用机械式开键槽固定。