diff --git a/mio/bin/Makefile.am b/mio/bin/Makefile.am
index 47cfb78..95cd9f4 100644
--- a/mio/bin/Makefile.am
+++ b/mio/bin/Makefile.am
@@ -46,3 +46,9 @@ mio_t04_SOURCES = t04.c
 mio_t04_CPPFLAGS = $(CPPFLAGS_LIB_COMMON)
 mio_t04_LDFLAGS = $(LDFLAGS_LIB_COMMON)
 mio_t04_LDADD = $(LIBADD_LIB_COMMON) -lmio $(SSL_LIBS) $(SOCKET_LIBS) $(SENDFILE_LIBS)
+
+bin_PROGRAMS += mio-t05
+mio_t05_SOURCES = t05.c
+mio_t05_CPPFLAGS = $(CPPFLAGS_LIB_COMMON)
+mio_t05_LDFLAGS = $(LDFLAGS_LIB_COMMON)
+mio_t05_LDADD = $(LIBADD_LIB_COMMON) -lmio $(SSL_LIBS) $(SOCKET_LIBS) $(SENDFILE_LIBS)
diff --git a/mio/bin/Makefile.in b/mio/bin/Makefile.in
index 4e99dfd..c7a36eb 100644
--- a/mio/bin/Makefile.in
+++ b/mio/bin/Makefile.in
@@ -89,7 +89,7 @@ POST_UNINSTALL = :
 build_triplet = @build@
 host_triplet = @host@
 bin_PROGRAMS = mio-execd$(EXEEXT) mio-t01$(EXEEXT) mio-t02$(EXEEXT) \
-	mio-t03$(EXEEXT) mio-t04$(EXEEXT)
+	mio-t03$(EXEEXT) mio-t04$(EXEEXT) mio-t05$(EXEEXT)
 subdir = bin
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
 am__aclocal_m4_deps = $(top_srcdir)/m4/ax_check_sign.m4 \
@@ -148,6 +148,13 @@ mio_t04_DEPENDENCIES = $(am__DEPENDENCIES_2) $(am__DEPENDENCIES_1) \
 mio_t04_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
 	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
 	$(mio_t04_LDFLAGS) $(LDFLAGS) -o $@
+am_mio_t05_OBJECTS = mio_t05-t05.$(OBJEXT)
+mio_t05_OBJECTS = $(am_mio_t05_OBJECTS)
+mio_t05_DEPENDENCIES = $(am__DEPENDENCIES_2) $(am__DEPENDENCIES_1) \
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
+mio_t05_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
+	$(mio_t05_LDFLAGS) $(LDFLAGS) -o $@
 AM_V_P = $(am__v_P_@AM_V@)
 am__v_P_ = $(am__v_P_@AM_DEFAULT_V@)
 am__v_P_0 = false
@@ -165,7 +172,8 @@ depcomp = $(SHELL) $(top_srcdir)/ac/depcomp
 am__maybe_remake_depfiles = depfiles
 am__depfiles_remade = ./$(DEPDIR)/mio_execd-execd.Po \
 	./$(DEPDIR)/mio_t01-t01.Po ./$(DEPDIR)/mio_t02-t02.Po \
-	./$(DEPDIR)/mio_t03-t03.Po ./$(DEPDIR)/mio_t04-t04.Po
+	./$(DEPDIR)/mio_t03-t03.Po ./$(DEPDIR)/mio_t04-t04.Po \
+	./$(DEPDIR)/mio_t05-t05.Po
 am__mv = mv -f
 COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
 	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
@@ -186,9 +194,10 @@ am__v_CCLD_ = $(am__v_CCLD_@AM_DEFAULT_V@)
 am__v_CCLD_0 = @echo "  CCLD    " $@;
 am__v_CCLD_1 = 
 SOURCES = $(mio_execd_SOURCES) $(mio_t01_SOURCES) $(mio_t02_SOURCES) \
-	$(mio_t03_SOURCES) $(mio_t04_SOURCES)
+	$(mio_t03_SOURCES) $(mio_t04_SOURCES) $(mio_t05_SOURCES)
 DIST_SOURCES = $(mio_execd_SOURCES) $(mio_t01_SOURCES) \
-	$(mio_t02_SOURCES) $(mio_t03_SOURCES) $(mio_t04_SOURCES)
+	$(mio_t02_SOURCES) $(mio_t03_SOURCES) $(mio_t04_SOURCES) \
+	$(mio_t05_SOURCES)
 am__can_run_installinfo = \
   case $$AM_UPDATE_INFO_DIR in \
     n|no|NO) false;; \
@@ -398,6 +407,10 @@ mio_t04_SOURCES = t04.c
 mio_t04_CPPFLAGS = $(CPPFLAGS_LIB_COMMON)
 mio_t04_LDFLAGS = $(LDFLAGS_LIB_COMMON)
 mio_t04_LDADD = $(LIBADD_LIB_COMMON) -lmio $(SSL_LIBS) $(SOCKET_LIBS) $(SENDFILE_LIBS)
+mio_t05_SOURCES = t05.c
+mio_t05_CPPFLAGS = $(CPPFLAGS_LIB_COMMON)
+mio_t05_LDFLAGS = $(LDFLAGS_LIB_COMMON)
+mio_t05_LDADD = $(LIBADD_LIB_COMMON) -lmio $(SSL_LIBS) $(SOCKET_LIBS) $(SENDFILE_LIBS)
 all: all-am
 
 .SUFFIXES:
@@ -501,6 +514,10 @@ mio-t04$(EXEEXT): $(mio_t04_OBJECTS) $(mio_t04_DEPENDENCIES) $(EXTRA_mio_t04_DEP
 	@rm -f mio-t04$(EXEEXT)
 	$(AM_V_CCLD)$(mio_t04_LINK) $(mio_t04_OBJECTS) $(mio_t04_LDADD) $(LIBS)
 
+mio-t05$(EXEEXT): $(mio_t05_OBJECTS) $(mio_t05_DEPENDENCIES) $(EXTRA_mio_t05_DEPENDENCIES) 
+	@rm -f mio-t05$(EXEEXT)
+	$(AM_V_CCLD)$(mio_t05_LINK) $(mio_t05_OBJECTS) $(mio_t05_LDADD) $(LIBS)
+
 mostlyclean-compile:
 	-rm -f *.$(OBJEXT)
 
@@ -512,6 +529,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mio_t02-t02.Po@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mio_t03-t03.Po@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mio_t04-t04.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mio_t05-t05.Po@am__quote@ # am--include-marker
 
 $(am__depfiles_remade):
 	@$(MKDIR_P) $(@D)
@@ -613,6 +631,20 @@ mio_t04-t04.obj: t04.c
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
 @am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(mio_t04_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o mio_t04-t04.obj `if test -f 't04.c'; then $(CYGPATH_W) 't04.c'; else $(CYGPATH_W) '$(srcdir)/t04.c'; fi`
 
+mio_t05-t05.o: t05.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(mio_t05_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT mio_t05-t05.o -MD -MP -MF $(DEPDIR)/mio_t05-t05.Tpo -c -o mio_t05-t05.o `test -f 't05.c' || echo '$(srcdir)/'`t05.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/mio_t05-t05.Tpo $(DEPDIR)/mio_t05-t05.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='t05.c' object='mio_t05-t05.o' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(mio_t05_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o mio_t05-t05.o `test -f 't05.c' || echo '$(srcdir)/'`t05.c
+
+mio_t05-t05.obj: t05.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(mio_t05_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT mio_t05-t05.obj -MD -MP -MF $(DEPDIR)/mio_t05-t05.Tpo -c -o mio_t05-t05.obj `if test -f 't05.c'; then $(CYGPATH_W) 't05.c'; else $(CYGPATH_W) '$(srcdir)/t05.c'; fi`
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/mio_t05-t05.Tpo $(DEPDIR)/mio_t05-t05.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='t05.c' object='mio_t05-t05.obj' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(mio_t05_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o mio_t05-t05.obj `if test -f 't05.c'; then $(CYGPATH_W) 't05.c'; else $(CYGPATH_W) '$(srcdir)/t05.c'; fi`
+
 mostlyclean-libtool:
 	-rm -f *.lo
 
@@ -751,6 +783,7 @@ distclean: distclean-am
 	-rm -f ./$(DEPDIR)/mio_t02-t02.Po
 	-rm -f ./$(DEPDIR)/mio_t03-t03.Po
 	-rm -f ./$(DEPDIR)/mio_t04-t04.Po
+	-rm -f ./$(DEPDIR)/mio_t05-t05.Po
 	-rm -f Makefile
 distclean-am: clean-am distclean-compile distclean-generic \
 	distclean-tags
@@ -801,6 +834,7 @@ maintainer-clean: maintainer-clean-am
 	-rm -f ./$(DEPDIR)/mio_t02-t02.Po
 	-rm -f ./$(DEPDIR)/mio_t03-t03.Po
 	-rm -f ./$(DEPDIR)/mio_t04-t04.Po
+	-rm -f ./$(DEPDIR)/mio_t05-t05.Po
 	-rm -f Makefile
 maintainer-clean-am: distclean-am maintainer-clean-generic
 
diff --git a/mio/bin/t05.c b/mio/bin/t05.c
new file mode 100644
index 0000000..e944bf3
--- /dev/null
+++ b/mio/bin/t05.c
@@ -0,0 +1,116 @@
+#include <mio-utl.h>
+#include <string.h>
+#include <stdio.h>
+
+/* https://131002.net/siphash/siphash24.c */
+
+/*
+   SipHash-2-4 output with
+   k = 00 01 02 ...
+   and
+   in = (empty string)
+   in = 00 (1 byte)
+   in = 00 01 (2 bytes)
+   in = 00 01 02 (3 bytes)
+   ...
+   in = 00 01 02 ... 3e (63 bytes)
+*/
+mio_uint8_t vectors[64][8] =
+{
+	{ 0x31, 0x0e, 0x0e, 0xdd, 0x47, 0xdb, 0x6f, 0x72, },
+	{ 0xfd, 0x67, 0xdc, 0x93, 0xc5, 0x39, 0xf8, 0x74, },
+	{ 0x5a, 0x4f, 0xa9, 0xd9, 0x09, 0x80, 0x6c, 0x0d, },
+	{ 0x2d, 0x7e, 0xfb, 0xd7, 0x96, 0x66, 0x67, 0x85, },
+	{ 0xb7, 0x87, 0x71, 0x27, 0xe0, 0x94, 0x27, 0xcf, },
+	{ 0x8d, 0xa6, 0x99, 0xcd, 0x64, 0x55, 0x76, 0x18, },
+	{ 0xce, 0xe3, 0xfe, 0x58, 0x6e, 0x46, 0xc9, 0xcb, },
+	{ 0x37, 0xd1, 0x01, 0x8b, 0xf5, 0x00, 0x02, 0xab, },
+	{ 0x62, 0x24, 0x93, 0x9a, 0x79, 0xf5, 0xf5, 0x93, },
+	{ 0xb0, 0xe4, 0xa9, 0x0b, 0xdf, 0x82, 0x00, 0x9e, },
+	{ 0xf3, 0xb9, 0xdd, 0x94, 0xc5, 0xbb, 0x5d, 0x7a, },
+	{ 0xa7, 0xad, 0x6b, 0x22, 0x46, 0x2f, 0xb3, 0xf4, },
+	{ 0xfb, 0xe5, 0x0e, 0x86, 0xbc, 0x8f, 0x1e, 0x75, },
+	{ 0x90, 0x3d, 0x84, 0xc0, 0x27, 0x56, 0xea, 0x14, },
+	{ 0xee, 0xf2, 0x7a, 0x8e, 0x90, 0xca, 0x23, 0xf7, },
+	{ 0xe5, 0x45, 0xbe, 0x49, 0x61, 0xca, 0x29, 0xa1, },
+	{ 0xdb, 0x9b, 0xc2, 0x57, 0x7f, 0xcc, 0x2a, 0x3f, },
+	{ 0x94, 0x47, 0xbe, 0x2c, 0xf5, 0xe9, 0x9a, 0x69, },
+	{ 0x9c, 0xd3, 0x8d, 0x96, 0xf0, 0xb3, 0xc1, 0x4b, },
+	{ 0xbd, 0x61, 0x79, 0xa7, 0x1d, 0xc9, 0x6d, 0xbb, },
+	{ 0x98, 0xee, 0xa2, 0x1a, 0xf2, 0x5c, 0xd6, 0xbe, },
+	{ 0xc7, 0x67, 0x3b, 0x2e, 0xb0, 0xcb, 0xf2, 0xd0, },
+	{ 0x88, 0x3e, 0xa3, 0xe3, 0x95, 0x67, 0x53, 0x93, },
+	{ 0xc8, 0xce, 0x5c, 0xcd, 0x8c, 0x03, 0x0c, 0xa8, },
+	{ 0x94, 0xaf, 0x49, 0xf6, 0xc6, 0x50, 0xad, 0xb8, },
+	{ 0xea, 0xb8, 0x85, 0x8a, 0xde, 0x92, 0xe1, 0xbc, },
+	{ 0xf3, 0x15, 0xbb, 0x5b, 0xb8, 0x35, 0xd8, 0x17, },
+	{ 0xad, 0xcf, 0x6b, 0x07, 0x63, 0x61, 0x2e, 0x2f, },
+	{ 0xa5, 0xc9, 0x1d, 0xa7, 0xac, 0xaa, 0x4d, 0xde, },
+	{ 0x71, 0x65, 0x95, 0x87, 0x66, 0x50, 0xa2, 0xa6, },
+	{ 0x28, 0xef, 0x49, 0x5c, 0x53, 0xa3, 0x87, 0xad, },
+	{ 0x42, 0xc3, 0x41, 0xd8, 0xfa, 0x92, 0xd8, 0x32, },
+	{ 0xce, 0x7c, 0xf2, 0x72, 0x2f, 0x51, 0x27, 0x71, },
+	{ 0xe3, 0x78, 0x59, 0xf9, 0x46, 0x23, 0xf3, 0xa7, },
+	{ 0x38, 0x12, 0x05, 0xbb, 0x1a, 0xb0, 0xe0, 0x12, },
+	{ 0xae, 0x97, 0xa1, 0x0f, 0xd4, 0x34, 0xe0, 0x15, },
+	{ 0xb4, 0xa3, 0x15, 0x08, 0xbe, 0xff, 0x4d, 0x31, },
+	{ 0x81, 0x39, 0x62, 0x29, 0xf0, 0x90, 0x79, 0x02, },
+	{ 0x4d, 0x0c, 0xf4, 0x9e, 0xe5, 0xd4, 0xdc, 0xca, },
+	{ 0x5c, 0x73, 0x33, 0x6a, 0x76, 0xd8, 0xbf, 0x9a, },
+	{ 0xd0, 0xa7, 0x04, 0x53, 0x6b, 0xa9, 0x3e, 0x0e, },
+	{ 0x92, 0x59, 0x58, 0xfc, 0xd6, 0x42, 0x0c, 0xad, },
+	{ 0xa9, 0x15, 0xc2, 0x9b, 0xc8, 0x06, 0x73, 0x18, },
+	{ 0x95, 0x2b, 0x79, 0xf3, 0xbc, 0x0a, 0xa6, 0xd4, },
+	{ 0xf2, 0x1d, 0xf2, 0xe4, 0x1d, 0x45, 0x35, 0xf9, },
+	{ 0x87, 0x57, 0x75, 0x19, 0x04, 0x8f, 0x53, 0xa9, },
+	{ 0x10, 0xa5, 0x6c, 0xf5, 0xdf, 0xcd, 0x9a, 0xdb, },
+	{ 0xeb, 0x75, 0x09, 0x5c, 0xcd, 0x98, 0x6c, 0xd0, },
+	{ 0x51, 0xa9, 0xcb, 0x9e, 0xcb, 0xa3, 0x12, 0xe6, },
+	{ 0x96, 0xaf, 0xad, 0xfc, 0x2c, 0xe6, 0x66, 0xc7, },
+	{ 0x72, 0xfe, 0x52, 0x97, 0x5a, 0x43, 0x64, 0xee, },
+	{ 0x5a, 0x16, 0x45, 0xb2, 0x76, 0xd5, 0x92, 0xa1, },
+	{ 0xb2, 0x74, 0xcb, 0x8e, 0xbf, 0x87, 0x87, 0x0a, },
+	{ 0x6f, 0x9b, 0xb4, 0x20, 0x3d, 0xe7, 0xb3, 0x81, },
+	{ 0xea, 0xec, 0xb2, 0xa3, 0x0b, 0x22, 0xa8, 0x7f, },
+	{ 0x99, 0x24, 0xa4, 0x3c, 0xc1, 0x31, 0x57, 0x24, },
+	{ 0xbd, 0x83, 0x8d, 0x3a, 0xaf, 0xbf, 0x8d, 0xb7, },
+	{ 0x0b, 0x1a, 0x2a, 0x32, 0x65, 0xd5, 0x1a, 0xea, },
+	{ 0x13, 0x50, 0x79, 0xa3, 0x23, 0x1c, 0xe6, 0x60, },
+	{ 0x93, 0x2b, 0x28, 0x46, 0xe4, 0xd7, 0x06, 0x66, },
+	{ 0xe1, 0x91, 0x5f, 0x5c, 0xb1, 0xec, 0xa4, 0x6c, },
+	{ 0xf3, 0x25, 0x96, 0x5c, 0xa1, 0x6d, 0x62, 0x9f, },
+	{ 0x57, 0x5f, 0xf2, 0x8e, 0x60, 0x38, 0x1b, 0xe5, },
+	{ 0x72, 0x45, 0x06, 0xeb, 0x4c, 0x32, 0x8a, 0x95, }
+};
+
+
+int test_vectors()
+{
+#define MAXLEN 64
+
+	mio_uint8_t in[MAXLEN], out[8], k[16];
+	int i;
+	int ok = 1;
+
+	for( i = 0; i < 16; ++i ) k[i] = i;
+
+	for( i = 0; i < MAXLEN; ++i )
+	{
+		in[i] = i;
+		mio_sip_hash_24(k, in, i, out);
+
+		if ( memcmp( out, vectors[i], 8 ) )
+		{
+			printf( "test vector failed for %d bytes\n", i );
+			ok = 0;
+		}
+	}
+
+	return ok;
+}
+
+int main()
+{
+	if (test_vectors()) printf( "test vectors ok\n" );
+	return 0;
+}
diff --git a/mio/lib/Makefile.am b/mio/lib/Makefile.am
index 1d1bcb5..7880016 100644
--- a/mio/lib/Makefile.am
+++ b/mio/lib/Makefile.am
@@ -82,7 +82,8 @@ libmio_la_SOURCES = \
 	uch-prop.h \
 	tmr.c \
 	utf8.c \
-	utl.c
+	utl.c \
+	utl-siph.c
 
 
 libmio_la_CPPFLAGS = $(CPPFLAGS_LIB_COMMON)
diff --git a/mio/lib/Makefile.in b/mio/lib/Makefile.in
index 64e51b1..c8f2741 100644
--- a/mio/lib/Makefile.in
+++ b/mio/lib/Makefile.in
@@ -148,7 +148,7 @@ am__libmio_la_SOURCES_DIST = chr.c dns.c dns-cli.c ecs.c ecs-imp.h \
 	http-svr.c http-thr.c http-txt.c json.c mio-prv.h mio.c nwif.c \
 	path.c pipe.c pro.c sck.c skad.c sys.c sys-ass.c sys-err.c \
 	sys-log.c sys-mux.c sys-prv.h sys-tim.c thr.c uch-case.h \
-	uch-prop.h tmr.c utf8.c utl.c mar.c mar-cli.c
+	uch-prop.h tmr.c utf8.c utl.c utl-siph.c mar.c mar-cli.c
 @ENABLE_MARIADB_TRUE@am__objects_1 = libmio_la-mar.lo \
 @ENABLE_MARIADB_TRUE@	libmio_la-mar-cli.lo
 am_libmio_la_OBJECTS = libmio_la-chr.lo libmio_la-dns.lo \
@@ -162,7 +162,7 @@ am_libmio_la_OBJECTS = libmio_la-chr.lo libmio_la-dns.lo \
 	libmio_la-sys.lo libmio_la-sys-ass.lo libmio_la-sys-err.lo \
 	libmio_la-sys-log.lo libmio_la-sys-mux.lo libmio_la-sys-tim.lo \
 	libmio_la-thr.lo libmio_la-tmr.lo libmio_la-utf8.lo \
-	libmio_la-utl.lo $(am__objects_1)
+	libmio_la-utl.lo libmio_la-utl-siph.lo $(am__objects_1)
 libmio_la_OBJECTS = $(am_libmio_la_OBJECTS)
 AM_V_lt = $(am__v_lt_@AM_V@)
 am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
@@ -209,6 +209,7 @@ am__depfiles_remade = ./$(DEPDIR)/libmio_la-chr.Plo \
 	./$(DEPDIR)/libmio_la-sys-tim.Plo \
 	./$(DEPDIR)/libmio_la-sys.Plo ./$(DEPDIR)/libmio_la-thr.Plo \
 	./$(DEPDIR)/libmio_la-tmr.Plo ./$(DEPDIR)/libmio_la-utf8.Plo \
+	./$(DEPDIR)/libmio_la-utl-siph.Plo \
 	./$(DEPDIR)/libmio_la-utl.Plo
 am__mv = mv -f
 COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
@@ -441,7 +442,7 @@ libmio_la_SOURCES = chr.c dns.c dns-cli.c ecs.c ecs-imp.h err.c fmt.c \
 	http-thr.c http-txt.c json.c mio-prv.h mio.c nwif.c path.c \
 	pipe.c pro.c sck.c skad.c sys.c sys-ass.c sys-err.c sys-log.c \
 	sys-mux.c sys-prv.h sys-tim.c thr.c uch-case.h uch-prop.h \
-	tmr.c utf8.c utl.c $(am__append_2)
+	tmr.c utf8.c utl.c utl-siph.c $(am__append_2)
 libmio_la_CPPFLAGS = $(CPPFLAGS_LIB_COMMON)
 libmio_la_LDFLAGS = $(LDFLAGS_LIB_COMMON) $(am__append_3)
 libmio_la_LIBADD = $(LIBADD_LIB_COMMON) $(SSL_LIBS) $(SOCKET_LIBS) \
@@ -573,6 +574,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libmio_la-thr.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libmio_la-tmr.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libmio_la-utf8.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libmio_la-utl-siph.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libmio_la-utl.Plo@am__quote@ # am--include-marker
 
 $(am__depfiles_remade):
@@ -829,6 +831,13 @@ libmio_la-utl.lo: utl.c
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
 @am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libmio_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o libmio_la-utl.lo `test -f 'utl.c' || echo '$(srcdir)/'`utl.c
 
+libmio_la-utl-siph.lo: utl-siph.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libmio_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libmio_la-utl-siph.lo -MD -MP -MF $(DEPDIR)/libmio_la-utl-siph.Tpo -c -o libmio_la-utl-siph.lo `test -f 'utl-siph.c' || echo '$(srcdir)/'`utl-siph.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libmio_la-utl-siph.Tpo $(DEPDIR)/libmio_la-utl-siph.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='utl-siph.c' object='libmio_la-utl-siph.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libmio_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o libmio_la-utl-siph.lo `test -f 'utl-siph.c' || echo '$(srcdir)/'`utl-siph.c
+
 libmio_la-mar.lo: mar.c
 @am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libmio_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libmio_la-mar.lo -MD -MP -MF $(DEPDIR)/libmio_la-mar.Tpo -c -o libmio_la-mar.lo `test -f 'mar.c' || echo '$(srcdir)/'`mar.c
 @am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libmio_la-mar.Tpo $(DEPDIR)/libmio_la-mar.Plo
@@ -1031,6 +1040,7 @@ distclean: distclean-am
 	-rm -f ./$(DEPDIR)/libmio_la-thr.Plo
 	-rm -f ./$(DEPDIR)/libmio_la-tmr.Plo
 	-rm -f ./$(DEPDIR)/libmio_la-utf8.Plo
+	-rm -f ./$(DEPDIR)/libmio_la-utl-siph.Plo
 	-rm -f ./$(DEPDIR)/libmio_la-utl.Plo
 	-rm -f Makefile
 distclean-am: clean-am distclean-compile distclean-generic \
@@ -1111,6 +1121,7 @@ maintainer-clean: maintainer-clean-am
 	-rm -f ./$(DEPDIR)/libmio_la-thr.Plo
 	-rm -f ./$(DEPDIR)/libmio_la-tmr.Plo
 	-rm -f ./$(DEPDIR)/libmio_la-utf8.Plo
+	-rm -f ./$(DEPDIR)/libmio_la-utl-siph.Plo
 	-rm -f ./$(DEPDIR)/libmio_la-utl.Plo
 	-rm -f Makefile
 maintainer-clean-am: distclean-am maintainer-clean-generic
diff --git a/mio/lib/mio-utl.h b/mio/lib/mio-utl.h
index d09ec00..cf914f8 100644
--- a/mio/lib/mio-utl.h
+++ b/mio/lib/mio-utl.h
@@ -970,6 +970,16 @@ static MIO_INLINE mio_uint128_t mio_bswap128 (mio_uint128_t x)
 #endif
 
 
+/* =========================================================================
+ * SIP-HASH-PRF
+ * ========================================================================= */
+MIO_EXPORT void mio_sip_hash_24 (
+	const mio_uint8_t key[16],
+	mio_uint8_t*      dptr,
+	mio_oow_t         dlen,
+	mio_uint8_t       out[8]
+);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/mio/lib/utl-siph.c b/mio/lib/utl-siph.c
new file mode 100644
index 0000000..643f960
--- /dev/null
+++ b/mio/lib/utl-siph.c
@@ -0,0 +1,207 @@
+#include <mio-utl.h>
+
+
+/* 
+ * This code is based on https://github.com/emboss/siphash-c/blob/master/src/siphash.c
+ *
+ * See https://131002.net/siphash/siphash24.c for a reference implementation by the inventor.
+ */
+
+#define U8TO32_LE(p) (((mio_uint32_t)((p)[0])) | ((mio_uint32_t)((p)[1]) <<  8) | ((mio_uint32_t)((p)[2]) <<  16) | ((mio_uint32_t)((p)[3]) << 24))
+
+#define U32TO8_LE(p, v) do { \
+	(p)[0] = (mio_uint8_t)((v)); \
+	(p)[1] = (mio_uint8_t)((v) >>  8); \
+	(p)[2] = (mio_uint8_t)((v) >> 16); \
+	(p)[3] = (mio_uint8_t)((v) >> 24); \
+} while (0)
+
+
+#if (MIO_SIZEOF_UINT64_T > 0)
+typedef mio_uint64_t sip_uint64_t;
+
+#define U8TO64_LE(p) ((mio_uint64_t)U8TO32_LE(p) | ((mio_uint64_t)U8TO32_LE((p) + 4)) << 32 )
+
+#define U64TO8_LE(p, v) do { \
+	U32TO8_LE((p), (mio_uint32_t)((v))); \
+	U32TO8_LE((p) + 4, (mio_uint32_t)((v) >> 32)); \
+} while (0)
+
+#define ROTATE_LEFT_64(v, s) ((v) << (s)) | ((v) >> (64 - (s)))
+#define ROTATE_LEFT_64_TO(v, s) ((v) = ROTATE_LEFT_64((v), (s)))
+
+#define ADD64_TO(v, s) ((v) += (s))
+#define XOR64_TO(v, s) ((v) ^= (s))
+#define XOR64_INT(v, x) ((v) ^= (x))
+
+#else /* (MIO_SIZEOF_UINT64_T > 0) */
+
+struct sip_uint64_t
+{
+	mio_uint32_t _u32[2];
+}; 
+typedef struct sip_uint64_t sip_uint64_t;
+
+#if defined(MIO_ENDIAN_LITTLE)
+#	define lo _u32[0]
+#	define hi _u32[1]
+#elif defined(MIO_ENDIAN_BIG)
+#	define hi _u32[0]
+#	define lo _u32[1]
+#else
+#	error UNKNOWN ENDIAN
+#endif
+
+
+#define U8TO64_LE(p) u8to64_le(p)
+static MIO_INLINE sip_uint64_t u8to64_le (const mio_uint8_t* p)
+{
+	sip_uint64_t ret;
+	ret.lo = U8TO32_LE(p);
+	ret.hi = U8TO32_LE(p + 4);
+	return ret;
+}
+
+#define U64TO8_LE(p, v) u64to8_le(p, v)
+static MIO_INLINE void u64to8_le (mio_uint8_t* p, sip_uint64_t v)
+{
+	U32TO8_LE (p, v.lo);
+	U32TO8_LE (p + 4, v.hi);
+}
+
+#define ROTATE_LEFT_64_TO(v, s) \
+	((s) > 32? rotl64_swap(rotl64_to(&(v), (s) - 32)) : \
+	 (s) == 32? rotl64_swap(&(v)): rotl64_to(&(v), (s)))
+static MIO_INLINE sip_uint64_t* rotl64_to (sip_uint64_t* v, unsigned int s)
+{
+	mio_uint32_t uhi = (v->hi << s) | (v->lo >> (32 - s));
+	mio_uint32_t ulo = (v->lo << s) | (v->hi >> (32 - s));
+	v->hi = uhi;
+	v->lo = ulo;
+	return v;
+}
+
+static MIO_INLINE sip_uint64_t* rotl64_swap (sip_uint64_t *v)
+{
+	mio_uint32_t t = v->lo;
+	v->lo = v->hi;
+	v->hi = t;
+	return v;
+}
+
+#define ADD64_TO(v, s) add64_to(&(v), (s))
+static MIO_INLINE sip_uint64_t* add64_to (sip_uint64_t* v, sip_uint64_t s)
+{
+	v->lo += s.lo;
+	v->hi += s.hi;
+	if (v->lo < s.lo) v->hi++;
+	return v;
+}
+
+#define XOR64_TO(v, s) xor64_to(&(v), (s))
+static MIO_INLINE sip_uint64_t* xor64_to (sip_uint64_t* v, sip_uint64_t s)
+{
+	v->lo ^= s.lo;
+	v->hi ^= s.hi;
+	return v;
+}
+
+#define XOR64_INT(v, x) ((v).lo ^= (x))
+
+#endif /* (MIO_SIZEOF_UINT64_T > 0) */
+
+
+static const char sip_init_state_bin[] = "uespemos""modnarod""arenegyl""setybdet";
+#define sip_init_state (*(sip_uint64_t(*)[4])sip_init_state_bin)
+
+#define SIP_COMPRESS(v0, v1, v2, v3) do {\
+	ADD64_TO((v0), (v1)); \
+	ADD64_TO((v2), (v3)); \
+	ROTATE_LEFT_64_TO((v1), 13); \
+	ROTATE_LEFT_64_TO((v3), 16); \
+	XOR64_TO((v1), (v0)); \
+	XOR64_TO((v3), (v2)); \
+	ROTATE_LEFT_64_TO((v0), 32); \
+	ADD64_TO((v2), (v1)); \
+	ADD64_TO((v0), (v3)); \
+	ROTATE_LEFT_64_TO((v1), 17); \
+	ROTATE_LEFT_64_TO((v3), 21); \
+	XOR64_TO((v1), (v2)); \
+	XOR64_TO((v3), (v0)); \
+	ROTATE_LEFT_64_TO((v2), 32); \
+} while(0)
+
+#define SIP_2_ROUND(m, v0, v1, v2, v3) do { \
+	XOR64_TO((v3), (m)); \
+	SIP_COMPRESS(v0, v1, v2, v3); \
+	SIP_COMPRESS(v0, v1, v2, v3); \
+	XOR64_TO((v0), (m)); \
+} while (0)
+
+void mio_sip_hash_24 (const mio_uint8_t key[16], mio_uint8_t *dptr, mio_oow_t dlen, mio_uint8_t out[8])
+{
+	sip_uint64_t k0, k1;
+	sip_uint64_t v0, v1, v2, v3;
+	sip_uint64_t m, last;
+
+	mio_oow_t rem;
+	mio_uint8_t* end;
+
+	rem = dlen & 7; /* dlen % 8 */
+	end = dptr + dlen - rem;
+
+	k0 = U8TO64_LE(key);
+	k1 = U8TO64_LE(key + 8);
+
+	v0 = k0; XOR64_TO(v0, sip_init_state[0]);
+	v1 = k1; XOR64_TO(v1, sip_init_state[1]);
+	v2 = k0; XOR64_TO(v2, sip_init_state[2]);
+	v3 = k1; XOR64_TO(v3, sip_init_state[3]);
+
+	for (; dptr != end; dptr += 8) 
+	{
+		m = U8TO64_LE(dptr);
+		SIP_2_ROUND(m, v0, v1, v2, v3);
+	}
+
+#if (MIO_SIZEOF_UINT64_T > 0)
+	last = dlen << 56;
+
+#define OR_BYTE(n) (last |= ((mio_uint64_t)end[n]) << ((n) * 8))
+
+#else
+	last.hi = dlen << 24;
+	last.lo = 0;
+#define OR_BYTE(n) do { \
+	if (n >= 4) last.hi |= ((mio_uint32_t)end[n]) << ((n) >= 4 ? (n) * 8 - 32 : 0); \
+	else last.lo |= ((mio_uint32_t)end[n]) << ((n) >= 4 ? 0 : (n) * 8); \
+} while (0)
+#endif
+
+	switch (rem)
+	{
+		case 7: OR_BYTE (6);
+		case 6: OR_BYTE (5);
+		case 5: OR_BYTE (4);
+		case 4: OR_BYTE(3);
+		case 3: OR_BYTE(2);
+		case 2: OR_BYTE(1);
+		case 1: OR_BYTE(0);
+		case 0: break;
+	}
+
+	SIP_2_ROUND(last, v0, v1, v2, v3);
+
+	XOR64_INT(v2, 0xff);
+
+	SIP_COMPRESS (v0, v1, v2, v3);
+	SIP_COMPRESS (v0, v1, v2, v3);
+	SIP_COMPRESS (v0, v1, v2, v3);
+	SIP_COMPRESS (v0, v1, v2, v3);
+
+	XOR64_TO (v0, v1);
+	XOR64_TO (v0, v2);
+	XOR64_TO (v0, v3);
+
+	U64TO8_LE (out, v0);
+}