Revise crypto pages to remain current

[jgadsden]

Describe what change you would like :

The page on cryptography is out of date and is always going to struggle to be current
Revise the page so that it leads the user to the various sources that describe present day cryptography

Context :

Section: 02-foundations/04-crypto-principles

Declaration:

Please make sure you have:

• read the contribution guide and agree to the Code of Conduct
• not used agentic or generative AI in creating this issue

Context:

for example ASVS v5