Add initialization instructions to README

README.md

@@ -1,2 +1,28 @@
-# ccryptolib
+# CCryptoLib
 An integrated collection of cryptographic primitives written in Lua using the ComputerCraft system API.
+
+## Initializing the Random Number Generator
+All functions that take secret input may query the library's random generator,
+`ccryptolib.random`. CC doesn't have high-quality entropy sources, so instead of
+hoping for the best like other libraries do, CCryptoLib shifts that burden into
+*you!*
+
+If you trust the tmpim Krist node, you can fetch a socket token and use it for
+initialization:
+```lua
+local random = require "ccryptolib.random"
+
+-- Fetch a WebSocket token.
+local postHandle = assert(http.post("https://krist.dev/ws/start", ""))
+local data = textutils.unserializeJSON(postHandle.readAll())
+postHandle.close()
+
+-- Initialize the generator using the given URL.
+random.init(data.url)
+
+-- Be polite and actually open the socket too.
+http.websocket(data.url).close()
+```
+
+Otherwise, you will need to find another high-quality random entropy source to
+initialize the generator. **DO NOT INITIALIZE USING MATH.RANDOM.**