> For the complete documentation index, see [llms.txt](https://docs.cyclenetwork.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cyclenetwork.io/design-architecture/technical-background.md).

# Technical Background

In this section, we introduce several fundamental concepts that are crucial for understanding the architecture of Cycle Network. These concepts include Rollup, Zero-Knowledge Proofs (ZKP), Sequencer, and Fully Homomorphic Encryption (FHE).