diff --git a/libisofs/filters/xor_encrypt.c b/libisofs/filters/xor_encrypt.c
deleted file mode 100644
index 69bb49b..0000000
--- a/libisofs/filters/xor_encrypt.c
+++ /dev/null
@@ -1,192 +0,0 @@
-/*
- * Copyright (c) 2008 Vreixo Formoso
- * 
- * This file is part of the libisofs project; you can redistribute it and/or 
- * modify it under the terms of the GNU General Public License version 2 
- * or later as published by the Free Software Foundation. 
- * See COPYING file for details.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "../config.h"
-#endif
-
-#include "../libisofs.h"
-#include "../filter.h"
-#include "../fsource.h"
-
-/*
- * A simple Filter implementation for example purposes. It encrypts a file
- * by XORing each byte by a given key.
- */
-
-static ino_t xor_ino_id = 0;
-
-typedef struct
-{
-    IsoStream *orig;
-    uint8_t key;
-    ino_t id;
-} XorEncryptStreamData;
-
-static
-int xor_encrypt_stream_open(IsoStream *stream)
-{
-    XorEncryptStreamData *data;
-    if (stream == NULL) {
-        return ISO_NULL_POINTER;
-    }
-    data = (XorEncryptStreamData*)stream->data;
-    return iso_stream_open(data->orig);
-}
-
-static
-int xor_encrypt_stream_close(IsoStream *stream)
-{
-    XorEncryptStreamData *data;
-    if (stream == NULL) {
-        return ISO_NULL_POINTER;
-    }
-    data = stream->data;
-    return iso_stream_close(data->orig);
-}
-
-static
-off_t xor_encrypt_stream_get_size(IsoStream *stream)
-{
-    XorEncryptStreamData *data;
-    if (stream == NULL) {
-        return ISO_NULL_POINTER;
-    }
-    data = stream->data;
-    return iso_stream_get_size(data->orig);
-}
-
-static
-int xor_encrypt_stream_read(IsoStream *stream, void *buf, size_t count)
-{
-    int ret, len;
-    XorEncryptStreamData *data;
-    uint8_t *buffer = buf;
-
-    if (stream == NULL) {
-        return ISO_NULL_POINTER;
-    }
-    data = stream->data;
-    ret = iso_stream_read(data->orig, buf, count);
-    if (ret < 0) {
-        return ret;
-    }
-    
-    /* xor */
-    for (len = 0; len < ret; ++len) {
-        buffer[len] = buffer[len] ^ data->key;
-    }
-    
-    return ret;
-}
-
-static
-int xor_encrypt_stream_is_repeatable(IsoStream *stream)
-{
-    /* the filter can't be created if underlying stream is not repeatable */
-    return 1;
-}
-
-static
-void xor_encrypt_stream_get_id(IsoStream *stream, unsigned int *fs_id, 
-                               dev_t *dev_id, ino_t *ino_id)
-{
-    XorEncryptStreamData *data = stream->data;
-    *fs_id = ISO_FILTER_FS_ID;
-    *dev_id = XOR_ENCRYPT_DEV_ID;
-    *ino_id = data->id;
-}
-
-static
-void xor_encrypt_stream_free(IsoStream *stream)
-{
-    XorEncryptStreamData *data = stream->data;
-    iso_stream_unref(data->orig);
-    free(data);
-}
-
-IsoStreamIface xor_encrypt_stream_class = {
-    0,
-    "xorf",
-    xor_encrypt_stream_open,
-    xor_encrypt_stream_close,
-    xor_encrypt_stream_get_size,
-    xor_encrypt_stream_read,
-    xor_encrypt_stream_is_repeatable,
-    xor_encrypt_stream_get_id,
-    xor_encrypt_stream_free
-};
-
-
-static
-void xor_encrypt_filter_free(FilterContext *filter)
-{
-    free(filter->data);
-}
-
-static
-int xor_encrypt_filter_get_filter(FilterContext *filter, IsoStream *original, 
-                  IsoStream **filtered)
-{
-    IsoStream *str;
-    XorEncryptStreamData *data;
-
-    if (filter == NULL || original == NULL || filtered == NULL) {
-        return ISO_NULL_POINTER;
-    }
-
-    str = malloc(sizeof(IsoStream));
-    if (str == NULL) {
-        return ISO_OUT_OF_MEM;
-    }
-    data = malloc(sizeof(XorEncryptStreamData));
-    if (str == NULL) {
-        free(str);
-        return ISO_OUT_OF_MEM;
-    }
-
-    /* fill data */
-    data->key = *((uint8_t*)filter->data);
-    data->id = xor_ino_id++;
-
-    /* get reference to the source */
-    data->orig = original;
-    iso_stream_ref(original);
-    
-    str->refcount = 1;
-    str->data = data;
-    str->class = &xor_encrypt_stream_class;
-
-    *filtered = str;
-    return ISO_SUCCESS;
-}
-
-int create_xor_encrypt_filter(uint8_t key, FilterContext **filter)
-{
-    FilterContext *f;
-    uint8_t *data;
-    
-    f = calloc(1, sizeof(FilterContext));
-    if (f == NULL) {
-        return ISO_OUT_OF_MEM;
-    }
-    data = malloc(sizeof(uint8_t));
-    if (data == NULL) {
-        free(f);
-        return ISO_OUT_OF_MEM;
-    }
-    f->refcount = 1;
-    f->version = 0;
-    *data = key;
-    f->data = data;
-    f->free = xor_encrypt_filter_free;
-    f->get_filter = xor_encrypt_filter_get_filter;
-    
-    return ISO_SUCCESS;
-}