In this paper, we present a detailed and systematic overview of communication security aspects of Multi-Processor Systems-on-Chip (MPSoC) and the emerging potential threats on the novel Cloud-of-Chips (CoC) paradigm. The CoC concept refers to highly scalable and composable systems, assembled not only at system design-time using RTL, like traditional SoC, but also at integrated circuit (IC) packaging time thanks to 3D-IC integration technology. Practical implementation of CoC systems needs to solve the problem of scalable, configurable and secure communication not only between different functional blocks in a single ICs, but also between different ICs in a single package, and between different packages on the same or different PCBs and even between different systems. To boost such extremely flexible communication infrastructure CoC system relies on Software-Defined Network-on-Chip (SDNoC) paradigm that combines design-time configurability of on-chip systems (NoC) and highly configurable communication of macroscopic systems (SDN). This study first explores security threats and existing solutions for traditional MPSoC platforms. Afterwards, we propose SDNoC as an alternative to MPSoC communication security, and we further extend our discussion to CoC systems to identify additional security concerns. Moreover, we present a comparison of SDNoC based approach over existing approaches and discuss its potential advantages.

在本文中，我们将对多处理器片上系统（MPSoC）的通信安全性以及新颖的芯片云（CoC）范式中出现的潜在威胁进行详细而系统的概述。CoC概念是指高度可扩展且可组合的这些系统不仅像传统SoC一样在系统设计时使用RTL进行组装，而且借助3D-IC集成技术在集成电路（IC）封装时进行组装。CoC系统的实际实现不仅需要解决单个IC中不同功能块之间，而且还需要解决单个封装中不同IC之间，相同或不同PCB上不同封装之间甚至甚至是可扩展，可配置和安全通信的问题。在不同系统之间。为了增强这种极为灵活的通信基础架构，CoC系统依赖于软件定义的片上网络（SDNoC）范例，该范例结合了片上系统（NoC）的设计时可配置性和宏观系统（SDN）的高度可配置的通信。这项研究首先探讨了传统MPSoC平台的安全威胁和现有解决方案。之后，我们提出SDNoC作为MPSoC通信安全性的替代方案，并且我们进一步将讨论扩展到CoC系统，以发现其他安全问题。此外，我们将基于SDNoC的方法与现有方法进行比较，并讨论其潜在优势。