1 files changed, 34 insertions, 4 deletions

diff --git a/site/content/JWT.md b/site/content/JWT.md
index 91a7a73..f55ab17 100644
--- a/site/content/JWT.md
+++ b/site/content/JWT.md
@@ -4,8 +4,38 @@ description = "JSON Web Token Documentation"
 weight = 5
 +++
 
-Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod
-tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At
-vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd
-ubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.
+> JSON Web Tokens are representations of claims, or authorization proofs that fit into the `Header` of HTTP requests.
+
+# How?
+
+JWTs are used as the [MAC](https://en.wikipedia.org/wiki/Message_authentication_code) of operations that require authorization:
+- block proposal
+- transaction proposal.
+
+They are send alongside the JSON request body in the `Header`;
+
+```html
+Authorization: Bearer aaaaaa.bbbbbb.ccccc
+```
+
+Gradecoin uses 3 fields for the JWTs;
+
+```json
+{
+"tha": "Hash of the payload, check invididual references",
+"iat": "Issued At, Unix Time",
+"exp": "Expiration Time, epoch"
+}
+```
+
+- `tha` is explained in [blocks](@/block_docs.md) and [transactions](@/transaction_docs.md) documentations.
+- `iat` when the JWT was created in [Unix Time](https://en.wikipedia.org/wiki/Unix_time) format
+- `exp` when the JWT will expire & be rejected in [Unix Time](https://en.wikipedia.org/wiki/Unix_time)
+
+# Algorithm
+We are using [RS256](https://www.rfc-editor.org/rfc/rfc7518.html#section-3.1), `RSASSA-PKCS1-v1_5 using SHA-256`. The JWTs you encode with your private RSA key will be decoded using the public key you have authenticated with. You can see how the process works [here](https://jwt.io/).
+
+# References
+- [RFC, the ultimate reference](https://tools.ietf.org/html/rfc7519)
+- [JWT Debugger](https://jwt.io/)