diff --git a/hash.c b/hash.c
index 4aeb87b..e009aad 100644
--- a/hash.c
+++ b/hash.c
@@ -1,4 +1,9 @@
-#include "params.h"
+/*
+hash.c version 20150811
+Andreas Hülsing
+Public domain.
+*/
+
 #include "prg.h"
 
 #include <stddef.h>
diff --git a/hash.h b/hash.h
index 1f6bfd6..8e4dd9f 100644
--- a/hash.h
+++ b/hash.h
@@ -1,8 +1,12 @@
+/*
+hash.h version 20150811
+Andreas Hülsing
+Public domain.
+*/
+
 #ifndef HASH_H
 #define HASH_H
 
-#include "params.h"
-
 int prf_m(unsigned char *out, const unsigned char *in, size_t inlen, const unsigned char *key, int keylen);
 int hash_m(unsigned char *out,const unsigned char *in,unsigned long long inlen, const unsigned char *key, const int keylen, const int m);
 int hash_2n_n(unsigned char *out,const unsigned char *in, const unsigned char *pub_seed, unsigned char addr[16], const int n);
diff --git a/params.h b/params.h
deleted file mode 100644
index 897e904..0000000
--- a/params.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#define TREE_HEIGHT 10
-#define WOTS_LOGW 4 // -> w = 16
-
-#define SK_RAND_SEED_BYTES 32
-#define MESSAGE_HASH_SEED_BYTES 32
-
-#define WOTS_W (1 << WOTS_LOGW)
-#define WOTS_L1 ((256+WOTS_LOGW-1)/WOTS_LOGW)
-#define WOTS_L 67  // for WOTS_W == 16
-#define WOTS_LOG_L 7  // for WOTS_W == 16
-#define WOTS_SIGBYTES (WOTS_L*HASH_BYTES)
-
-#define HASH_BYTES 32 
diff --git a/prg.c b/prg.c
index 01bd7e3..915df75 100644
--- a/prg.c
+++ b/prg.c
@@ -1,5 +1,10 @@
+/*
+prg.c version 20150811
+Andreas Hülsing
+Public domain.
+*/
+
 #include "chacha.h"
-//#include "params.h"
 #include "prg.h"
 
 const unsigned char zero_nonce[12] = {0};
diff --git a/prg.h b/prg.h
index ae5bd06..88b17e1 100644
--- a/prg.h
+++ b/prg.h
@@ -1,3 +1,9 @@
+/*
+prg.h version 20150811
+Andreas Hülsing
+Public domain.
+*/
+
 #ifndef PRG_H
 #define PRG_H
 #include <stdlib.h>
diff --git a/randombytes.c b/randombytes.c
index f3b8d41..310d1ce 100644
--- a/randombytes.c
+++ b/randombytes.c
@@ -1,3 +1,7 @@
+/*
+This code was taken from the SPHINCS reference implementation and is public domain.
+*/
+
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
diff --git a/test/test_chacha b/test/test_chacha
index 335b7d8..9a032af 100755
Binary files a/test/test_chacha and b/test/test_chacha differ
diff --git a/test/test_wots b/test/test_wots
index 8c743cc..0e31151 100755
Binary files a/test/test_wots and b/test/test_wots differ
diff --git a/test/test_wots.c b/test/test_wots.c
index aa496a3..aeb4073 100644
--- a/test/test_wots.c
+++ b/test/test_wots.c
@@ -1,7 +1,6 @@
 #include <stdio.h>
 #include "../wots.h"
 #include "../randombytes.h"
-#include "../params.h"
 
 static void hexdump(unsigned char *a, size_t len)
 {
diff --git a/test/test_xmss b/test/test_xmss
index a50c78a..0f79b62 100755
Binary files a/test/test_xmss and b/test/test_xmss differ
diff --git a/wots.c b/wots.c
index 04ee5cb..b0ca2ad 100644
--- a/wots.c
+++ b/wots.c
@@ -1,5 +1,5 @@
 /*
-wots.c version 2015xxxx
+wots.c version 20150811
 Andreas Hülsing
 Public domain.
 */
diff --git a/wots.h b/wots.h
index 3c03469..3ca70a4 100644
--- a/wots.h
+++ b/wots.h
@@ -1,7 +1,12 @@
+/*
+wots.h version 20150811
+Andreas Hülsing
+Public domain.
+*/
+
 #ifndef WOTS_H
 #define WOTS_H
 
-#include "params.h"
 /**
  * WOTS parameter set
  * 
diff --git a/xmss.c b/xmss.c
index 3d05a5f..275d432 100644
--- a/xmss.c
+++ b/xmss.c
@@ -1,3 +1,9 @@
+/*
+xmss.c version 20150811
+Andreas Hülsing
+Public domain.
+*/
+
 #include "xmss.h"
 #include <stdlib.h>
 #include <string.h>
diff --git a/xmss.h b/xmss.h
index e7ee288..c95907a 100644
--- a/xmss.h
+++ b/xmss.h
@@ -1,3 +1,9 @@
+/*
+xmss.h version 20150811
+Andreas Hülsing
+Public domain.
+*/
+
 #include "wots.h"
 
 #ifndef XMSS_H
diff --git a/xmss_commons.c b/xmss_commons.c
index 4457697..834fa5e 100644
--- a/xmss_commons.c
+++ b/xmss_commons.c
@@ -1,3 +1,9 @@
+/*
+xmss_commons.c version 20150811
+Andreas Hülsing
+Public domain.
+*/
+
 #include "xmss_commons.h"
 #include <stdlib.h>
 #include <stdio.h>
diff --git a/xmss_commons.h b/xmss_commons.h
index be21195..4b780cf 100644
--- a/xmss_commons.h
+++ b/xmss_commons.h
@@ -1,3 +1,8 @@
+/*
+xmss_commons.h version 20150811
+Andreas Hülsing
+Public domain.
+*/
 #ifndef XMSS_COMMONS_H
 #define XMSS_COMMONS_H
 
diff --git a/zerobytes.c b/zerobytes.c
index bf04984..04056d2 100644
--- a/zerobytes.c
+++ b/zerobytes.c
@@ -1,3 +1,8 @@
+/*
+This code was taken from the SPHINCS reference implementation.
+Public domain.
+*/
+
 #include "zerobytes.h"
 
 unsigned char *zerobytes(unsigned char *r,unsigned long long n)