diff --git a/tech/DSS.wiki b/tech/DSS.wiki
new file mode 100644
index 0000000..5618f89
--- /dev/null
+++ b/tech/DSS.wiki
@@ -0,0 +1 @@
+= DSS =
diff --git a/tech/Diffie_Helman.wiki b/tech/Diffie_Helman.wiki
new file mode 100644
index 0000000..68cd7e9
--- /dev/null
+++ b/tech/Diffie_Helman.wiki
@@ -0,0 +1 @@
+= Diffie Helman =
diff --git a/tech/Eliptic_Curve.wiki b/tech/Eliptic_Curve.wiki
new file mode 100644
index 0000000..b6f348b
--- /dev/null
+++ b/tech/Eliptic_Curve.wiki
@@ -0,0 +1 @@
+= Eliptic Curve Cryptography =
diff --git a/tech/RSA.wiki b/tech/RSA.wiki
new file mode 100644
index 0000000..080d215
--- /dev/null
+++ b/tech/RSA.wiki
@@ -0,0 +1 @@
+= RSA =
diff --git a/tech/electronics.wiki b/tech/electronics.wiki
index 1d78709..3a63cd4 100644
--- a/tech/electronics.wiki
+++ b/tech/electronics.wiki
@@ -63,6 +63,7 @@ Also see
 * [[Flip-flop]]
 * [[registers|Registers]]
 * [[counters|Counters]]
+* [[LFSR|Linear Feedback Shift Registers]]
 
 === Theoretical ===
 
diff --git a/tech/security.wiki b/tech/security.wiki
index ede9a3f..c195bd0 100644
--- a/tech/security.wiki
+++ b/tech/security.wiki
@@ -10,14 +10,20 @@ Hiding information
 
 === Ciphers ===
 
+==== Symetric ciphers ====
+
 * [[substitution|Substitution]]
 * [[Affine]]
-
-Modern ciphers
-
 * [[DES]]
 * [[AES]]
 
+==== Asymetric Ciphers ====
+
+* [[RSA]]
+* [[Diffie_Helman]]
+* [[DSS]]
+* [[Eliptic_Curve]]
+
 === Misc ===
 
 * [[LFSR|Linear Feedback Shift Registers]]