worked on file io

src/encrypt.lua

@@ -42,20 +42,48 @@ once the table reaches 512kb, encrypt it, and put it
 into tmp files. once all of the data has been encrypted 
 stitch together all the tmp files
 
-local bytes = {}
-file = assert(io.open(arg[1], "rb"))
-block = 1 --blocks of 1 byte
+load the file into two arrays as words into bytesA and bytesB 
+where bytesA & B alternate between bytes (odd and even)
+
+encrypt
+
+merge arrays load into encrypted array
+
+write to output file
+
+local bytesA = {}
+local bytesB = {}
+input = assert(io.open(arg[1], "rb"))
+output = assert(io.open(arg[2], "wb"))
+io.output(arg[2])
+
+local block = 1 --blocks of 1 byte
 while true do
-    local byte = file:read(block)
+    local byte = input:read(block)
     if byte == nil then
         break
     else
-        bytes[#bytes+1] = string.byte(byte)
+	--break word 1 into bytes
+        --load the bytes into an array
+	bytesA[#bytesA+1] = string.byte(byte)
     end
+
+while true do
+    local byte = input:read(block)
+    if byte == nil then
+        break
+    else
+	--break word 2 into bytes
+	--load the bytes into an array
+	--bytesB[#bytesB+1] = string.byte(byte)
+    end
+    merge arrays bytesA and bytesB
 end
-file:close()
+input:close()
+output:close()
 ]]
 
+
 local S = {}
 S[0] = P	--initialize the S array
 for i = 1, t do