diff --git a/Smart-Contract-Security/README.md b/Smart-Contract-Security/README.md
index 1a2d6b4..ed71251 100644
--- a/Smart-Contract-Security/README.md
+++ b/Smart-Contract-Security/README.md
@@ -1,23 +1,15 @@
-## ☠️ Security
+## ☠️ Smart Contract Security
 
+<br>
 
-
-### Basic security notes
-
-
-* `tx.origin` is used: you want to replace it by “msg.sender” because otherwise any contract you call can act on your behalf.
-* Avoid potential reetrancy bugs: 
-```
-msg.sender.transfer(amount);
-balances[msg.sender] -= amount;
-```
-* Inline assembly should be used only in rare cases.
-* Unclear semantics: `now` is alias for `block.timestamp` not current time; use of low level `call`, `callcode`, `delegatecall` should be avoided whenever possible; use `transfer` whenever failure of ether transfer should rollnack the whole transaction.
-* Beware of caller contracts: `selfdestruct` can block calling contracts unexpectedly.
-* Invocation of local functions via `this`: never use `this` to call functions in the same contract, it only consumes more gas than normal call.
-* Transferring Ether in a for/while/do-while loop should be avoid due to the block gas limit.
-* ERC20 `decimals` should have `uint8` as return type.
+In this repository:
 
 <br>
 
 
+* [Notes on reentrancy](https://github.com/bt3gl-labs/Blockchain-Development-and-Security/blob/main/Smart-Contract-Security/reentrancy-notes.md)
+* [Notes on frontrunning](https://github.com/bt3gl-labs/Blockchain-Development-and-Security/blob/main/Smart-Contract-Security/frontrunning-notes.md)
+* [Notes on arithmetic bugs](https://github.com/bt3gl-labs/Blockchain-Development-and-Security/blob/main/Smart-Contract-Security/arithmetic-bugs-notes.md)
+* [List of interesting hacks](https://github.com/bt3gl-labs/Blockchain-Development-and-Security/blob/main/Smart-Contract-Security/real-case-hacks.md)
+* [A guide for pentesting](https://github.com/bt3gl-labs/Blockchain-Development-and-Security/blob/main/Smart-Contract-Security/pentesting.md)
+* [Random security notes](https://github.com/bt3gl-labs/Blockchain-Development-and-Security/blob/main/Smart-Contract-Security/random-notes.md)