diff --git a/asc2qr.sh b/asc2qr.sh
index e98842f..a10e3ef 100755
--- a/asc2qr.sh
+++ b/asc2qr.sh
@@ -48,14 +48,13 @@ fi
 ## Split the key file into usable chunks that the QR encoder can consume
 chunks=()
 while true; do
-    s=$( head -c ${max_qr_bytes} )
-    echo "$s"
+    IFS= read -r -d'\0' -n ${max_qr_bytes} s
     if [ ${#s} -gt 0 ]; then
         chunks+=("${s}")
     else
         break
     fi
-done <<< "$( cat ${asc_key} )"
+done < ${asc_key}
 
 ## For each chunk, encode it into a qr image
 index=1
diff --git a/qr2asc.sh b/qr2asc.sh
index 9f00665..8c898cb 100755
--- a/qr2asc.sh
+++ b/qr2asc.sh
@@ -33,15 +33,6 @@ if [ $# -lt 1 ]; then
 	exit 1
 fi
 
-# Create a temp file to use as a pattern for splitting the input key file.
-# This helps protect against file collisions in the current directory.
-export TMPDIR=""
-tmp_file=$(mktemp keyparts.XXXXXX)
-if [ $? -ne 0 ]; then
-	echo "failed to create temporary file"
-	exit 1
-fi
-
 # For each image on the command line, decode it into text
 chunks=()
 index=1
diff --git a/test.sh b/test.sh
new file mode 100755
index 0000000..d85c9a1
--- /dev/null
+++ b/test.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+
+if [ $# -eq 0 ]; then
+    echo "usage: $(basename ${0}) <ascii armor key file>"
+    exit 1
+fi
+
+set -x
+
+asc_key="$1"
+
+./asc2qr.sh "${asc_key}"
+
+./qr2asc.sh QR*.png
+
+diff "${asc_key}" "./mykey.asc"
+if [ $? -eq 0 ]; then
+    echo "Diff Test: PASS"
+else
+    echo "Diff Test: FAIL"
+fi
+
+rm ./QR*.png
+rm ./mykey.asc