The Computer Science Unplugged activities and project has been an influential STEM (Science, Technology, Engineering & Mathematics) initiative, providing enrichment and teaching activities supporting computational thinking. Many of its activities are suitable for children. One of the most popular Unplugged activities is “Kid Krypto”, invented by Mike Fellows and Neal Koblitz. Kid Krypto demonstrates the mathematics underlying public-key cryptography without using advanced mathematics. The paper gives an example of a Kid Krypto-style encryption system that is based on disjoint cycles in a graph or network and which is accessible to a very young audience. Also described is the original Kid Krypto system which is based on a version of dominating set called perfect code. The paper urges research scientists to participate in mathematical sciences communication and outreach.

中文翻译：

---

计算思维的丰富：公钥密码学

未插拔的计算机科学活动和项目是一项颇具影响力的STEM（科学，技术，工程与数学）计划，旨在提供丰富的教学活动来支持计算思维。它的许多活动适合儿童。最受欢迎的“不插电”活动之一是“小子加密”，这是由Mike Fellows和Neal Koblitz发明的。Kid Krypto在不使用高级数学的情况下演示了公开密钥密码学所基于的数学。本文给出了一个基于图或网络中不相交周期的Kid Krypto式加密系统的示例，并且非常年轻的观众也可以使用。还描述了原始的Kid Krypto系统，该系统基于称为完美代码的支配集版本。