> For the complete documentation index, see [llms.txt](https://shai-deshe.gitbook.io/understanding-blockdags-and-ghostdag/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://shai-deshe.gitbook.io/understanding-blockdags-and-ghostdag/supplementary-material/computer-science/page-3.md).

# Cryptography

- [Random Oracles](https://shai-deshe.gitbook.io/understanding-blockdags-and-ghostdag/supplementary-material/computer-science/page-3/random-oracles.md)
- [Merkle Trees](https://shai-deshe.gitbook.io/understanding-blockdags-and-ghostdag/supplementary-material/computer-science/page-3/merkle-trees.md)
- [One Time Pads](https://shai-deshe.gitbook.io/understanding-blockdags-and-ghostdag/supplementary-material/computer-science/page-3/one-time-pads.md)