diff --git a/tech/LFSR.wiki b/tech/LFSR.wiki
index c6d3ff5..d31320f 100644
--- a/tech/LFSR.wiki
+++ b/tech/LFSR.wiki
@@ -7,7 +7,7 @@ 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 
+The maximum period for a _n_ bit shift register is
 
 2^n - 1
 
diff --git a/tech/security.wiki b/tech/security.wiki
index 17f1bb0..4ac1991 100644
--- a/tech/security.wiki
+++ b/tech/security.wiki
@@ -42,7 +42,7 @@ Hiding information
 
 === Math for Crypto ===
 
-* [[../math/congruences|Congruneces]]
+* [[congruences|Congruneces]]
 * [[modular_exponentiation|Modular Exponentiation]]
 
 -------------------
diff --git a/tech/substitution.wiki b/tech/substitution.wiki
index 4ceea7b..5168875 100644
--- a/tech/substitution.wiki
+++ b/tech/substitution.wiki
@@ -30,7 +30,7 @@ We make some assumptions
 * word divisions are not preserved
 * use frequency analysis to guess high frequency letters
   - E E N O R I A S are 70% of letters in english
-* identify 
+* identify
  - vowels
  - diagraphs (common combos of letters ie TH)
 * Use cribs