> For the complete documentation index, see [llms.txt](https://academy.dcentwallet.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://academy.dcentwallet.com/cryptography-basic.md).

# Cryptography basic

- [What is public-key cryptography?](https://academy.dcentwallet.com/cryptography-basic/what-is-public-key-cryptography.md)
- [What is a digital signature?](https://academy.dcentwallet.com/cryptography-basic/what-is-a-digital-signature.md)
- [What is a hash function? (1)](https://academy.dcentwallet.com/cryptography-basic/what-is-a-hash-function-1.md)
- [What is a hash function? (2)](https://academy.dcentwallet.com/cryptography-basic/what-is-a-hash-function-2.md)
- [Security of cryptography](https://academy.dcentwallet.com/cryptography-basic/security-of-cryptography.md)