Digital controllers are prone to side-channel and fault-insertion attacks that lead hardware security as the primary issue in its creation. On the other hand, optimal hardware design is also the prime concern while crafting a digital controller. A finite state machine (FSM) presents a novel framework for any complex digital controller, and a state assignment technique is used for its optimization. In this article, a reconfigurable state encoding technique (ReSET) is proposed for FSM to obtain security and hardware optimality. ReSET is a deterministic method, which employs algorithms such as, (a) robust quadratic sum code based state assignment, and (b) gradient-based interior point approach based state assignment. A user-defined reconfiguration factor is introduced in ReSET by which the degree of security and hardware optimality is configured for the FSM. An extensive set of experiments are executed to validate the ReSET’s feasibility, which also proves ReSET’s superiority in terms of area, computation time, power, and error masking probabilities over the state-of-art literature. To the best of author’s knowledge, ReSET has made the first successful attempt to achieve security as well as hardware optimality for an FSM by setting the reconfiguration factor.

数字控制器容易受到旁通道攻击和故障插入攻击，导致硬件安全成为其创建过程中的主要问题。另一方面，在设计数字控制器时，最佳的硬件设计也是主要考虑因素。有限状态机（FSM）为任何复杂的数字控制器提供了一种新颖的框架，并且使用状态分配技术对其进行了优化。本文为FSM提出了一种可重配置状态编码技术（ReSET），以获得安全性和硬件最优性。ReSET是一种确定性方法，它采用以下算法：（a）基于鲁棒二次和码的状态分配和（b）基于梯度的内部点方法的状态分配。在ReSET中引入了用户定义的重新配置因子，通过该因子可以为FSM配置安全性和硬件最佳化程度。执行了广泛的实验以验证ReSET的可行性，这也证明了ReSET在面积，计算时间，功能和错误掩盖概率方面均优于最新文献。据作者所知，ReSET首次成功通过设置重新配置因子来实现FSM的安全性和硬件最佳化。