I would start with merkle trees: https://en.wikipedia.org/wiki/Merkle_tree https://en.wikipedia.org/wiki/Merkle_tree Here's a blog post which is probably basic

I would start with merkle trees: https://en.wikipedia.org/wiki/Merkle_tree https://en.wikipedia.org/wiki/Merkle_tree Here's a blog post which is probably basically what you want: https://medium.com/system-design-blog/merkle-tree-and-its-applications-47b4128e2a0 https://medium.com/system-design-blog/merkle-tree-and-its-ap...