From f4943f65a3169f39ffef21cbd9c720582be0a2a3 Mon Sep 17 00:00:00 2001
From: Tyler Perkins <tperki17@kent.edu>
Date: Wed, 15 Dec 2021 14:00:01 -0500
Subject: [PATCH] Update for 15-12-21 14:00

---
 tech/LFSR.wiki     | 14 ++++++++++++++
 tech/security.wiki |  4 ++++
 2 files changed, 18 insertions(+)
 create mode 100644 tech/LFSR.wiki

diff --git a/tech/LFSR.wiki b/tech/LFSR.wiki
new file mode 100644
index 0000000..bf393f1
--- /dev/null
+++ b/tech/LFSR.wiki
@@ -0,0 +1,14 @@
+= Linear Feedback Shift Register =
+
+A LFSR is set of rules to alter a set of bits. They are useful to psudeo random
+number generators, and as key generators for stream ciphers.
+
+All LFSRs are cyclical in nature, and after a set amount of time will repeat
+back into themselves. THe initial state of the bits in the LFSR is called the
+seed.
+
+The maximum period for a _n_ bit shift register is 
+
+2^n - 1
+
+A *tap* is where a bit is read and fed back into itself.
diff --git a/tech/security.wiki b/tech/security.wiki
index fd0f3de..e3f45c1 100644
--- a/tech/security.wiki
+++ b/tech/security.wiki
@@ -11,6 +11,10 @@ Hiding information
 * [[substitution|Substitution]] 
 * [[Affine]]
 
+=== Misc ===
+
+* [[LFSR|Linear Feedback Shift Registers]]
+
 === Math for Crypto ===
 
 * [[../math/congruences]]