diff --git a/submodules/build/builder-iphone-os.mk b/submodules/build/builder-iphone-os.mk
index 47516d4e0..619e211d8 100644
--- a/submodules/build/builder-iphone-os.mk
+++ b/submodules/build/builder-iphone-os.mk
@@ -21,7 +21,7 @@
 ############################################################################
  
 host?=armv6-apple-darwin
-enable_zrtp=no
+enable_zrtp=yes
 config_site:=iphone-config.site
 library_mode:= --disable-shared --enable-static
 linphone_configure_controls=  --disable-video \
@@ -38,6 +38,7 @@ linphone_configure_controls=  --disable-video \
                               --with-gsm=$(prefix) \
                               LIBZRTPCPP_CFLAGS="-I$(prefix)/include" \
 			      LIBZRTPCPP_LIBS="-L$(prefix)/lib -lzrtpcpp -lcrypto" \
+			      SRTP_LIBS="-L$(prefix)/lib -lsrtp -lcrypto" \
                               SPEEX_CFLAGS="-I$(prefix)/include" \
                               SPEEXDSP_CFLAGS="-I$(prefix)/include" \
 			      SPEEXDSP_LIBS="-L$(prefix)/lib -lspeexdsp" \
@@ -108,7 +109,7 @@ clean-makefile-linphone: clean-makefile-osip2 clean-makefile-eXosip2 clean-makef
 	cd $(LINPHONE_BUILD_DIR) && rm -f Makefile && rm -f oRTP/Makefile && rm -f mediastreamer2/Makefile
 
 
-$(LINPHONE_SRC_DIR)/configure: build-srtp
+$(LINPHONE_SRC_DIR)/configure:
 	cd $(LINPHONE_SRC_DIR) && ./autogen.sh
 
 $(LINPHONE_BUILD_DIR)/Makefile: $(LINPHONE_SRC_DIR)/configure
diff --git a/submodules/build/builders.d/openssl.mk b/submodules/build/builders.d/openssl.mk
index 54a2b517e..0b2e5bf80 100644
--- a/submodules/build/builders.d/openssl.mk
+++ b/submodules/build/builders.d/openssl.mk
@@ -14,7 +14,7 @@ $(OPENSSL_BUILD_DIR)/Configure:
 	&& tar xvzf  openssl-$(openssl_version).tar.gz \
 	&& rm -f openssl-$(openssl_version).tar.gz \
 	&& mv  openssl-$(openssl_version) openssl  \
-	&& cd openssl && patch -p0 < $(BUILDER_SRC_DIR)/build/openssl.patch
+	&& cd openssl && patch -p0 < $(BUILDER_SRC_DIR)/build/builders.d/openssl.patch
 
 $(OPENSSL_BUILD_DIR)/Makefile: $(OPENSSL_BUILD_DIR)/Configure
 	cd $(OPENSSL_BUILD_DIR) \
diff --git a/submodules/build/openssl.patch b/submodules/build/builders.d/openssl.patch
similarity index 100%
rename from submodules/build/openssl.patch
rename to submodules/build/builders.d/openssl.patch
diff --git a/submodules/build/builders.d/srtp.mk b/submodules/build/builders.d/srtp.mk
index 05b1b545e..38cccdbd9 100644
--- a/submodules/build/builders.d/srtp.mk
+++ b/submodules/build/builders.d/srtp.mk
@@ -5,7 +5,8 @@ srtp_url?=http://srtp.sourceforge.net/srtp-$(srtp_version).tgz
 $(BUILDER_SRC_DIR)/$(srtp_dir)/configure:
 	cd $(BUILDER_SRC_DIR)/externals \
 	&& wget $(srtp_url) \
-	&& tar zxvf srtp-$(srtp_version).tgz
+	&& tar zxvf srtp-$(srtp_version).tgz \
+	&& cd srtp && patch -p0 < $(BUILDER_SRC_DIR)/build/builders.d/srtp.patch
 
 $(BUILDER_BUILD_DIR)/$(srtp_dir)/Makefile: $(BUILDER_SRC_DIR)/$(srtp_dir)/configure
 	mkdir -p $(BUILDER_BUILD_DIR)/$(srtp_dir)
@@ -16,7 +17,7 @@ $(BUILDER_BUILD_DIR)/$(srtp_dir)/Makefile: $(BUILDER_SRC_DIR)/$(srtp_dir)/config
 build-srtp: $(BUILDER_BUILD_DIR)/$(srtp_dir)/Makefile
 	cp -rf $(BUILDER_SRC_DIR)/$(srtp_dir)/include $(BUILDER_BUILD_DIR)/$(srtp_dir)
 	cp -rf $(BUILDER_SRC_DIR)/$(srtp_dir)/crypto/include $(BUILDER_BUILD_DIR)/$(srtp_dir)
-	-cd $(BUILDER_BUILD_DIR)/$(srtp_dir) && make uninstall
+	-cd $(BUILDER_BUILD_DIR)/$(srtp_dir) && make uninstall && make clean
 	cd $(BUILDER_BUILD_DIR)/$(srtp_dir) && make libsrtp.a && make install
 
 clean-srtp:
diff --git a/submodules/build/builders.d/srtp.patch b/submodules/build/builders.d/srtp.patch
new file mode 100644
index 000000000..7dfe02e97
--- /dev/null
+++ b/submodules/build/builders.d/srtp.patch
@@ -0,0 +1,77 @@
+diff -rupN ../srtp_old/crypto/cipher/aes_icm.c ./crypto/cipher/aes_icm.c
+--- ../srtp_old/crypto/cipher/aes_icm.c	2011-09-06 10:09:18.000000000 +0200
++++ ./crypto/cipher/aes_icm.c	2011-09-06 10:19:16.000000000 +0200
+@@ -281,7 +281,7 @@ aes_icm_set_iv(aes_icm_ctx_t *c, void *i
+  * this is an internal, hopefully inlined function
+  */
+   
+-inline void
++static void
+ aes_icm_advance_ismacryp(aes_icm_ctx_t *c, uint8_t forIsmacryp) {
+   /* fill buffer with new keystream */
+   v128_copy(&c->keystream_buffer, &c->counter);
+diff -rupN ../srtp_old/srtp.patch ./srtp.patch
+--- ../srtp_old/srtp.patch	2011-09-06 10:14:26.000000000 +0200
++++ ./srtp.patch	2011-09-06 10:21:47.000000000 +0200
+@@ -1,50 +1,12 @@
+-diff -rupN ../srtp_old/crypto/cipher/aes.c ./crypto/cipher/aes.c
+---- ../srtp_old/crypto/cipher/aes.c	2011-09-06 10:09:18.000000000 +0200
+-+++ ./crypto/cipher/aes.c	2011-09-06 10:05:35.000000000 +0200
+-@@ -1358,7 +1358,7 @@ static uint32_t U4[256] = {
+- 
+- extern debug_module_t mod_aes_icm;
+- 
++diff -rupN ../srtp_old/crypto/cipher/aes_icm.c ./crypto/cipher/aes_icm.c
++--- ../srtp_old/crypto/cipher/aes_icm.c	2011-09-06 10:09:18.000000000 +0200
+++++ ./crypto/cipher/aes_icm.c	2011-09-06 10:19:16.000000000 +0200
++@@ -281,7 +281,7 @@ aes_icm_set_iv(aes_icm_ctx_t *c, void *i
++  * this is an internal, hopefully inlined function
++  */
++   
+ -inline void
+-+void
+- aes_expand_encryption_key(const v128_t *key, 
+- 			  aes_expanded_key_t expanded_key) {
+-   int i;
+-@@ -1411,7 +1411,7 @@ aes_expand_encryption_key(const v128_t *
+-   }
+- }
+- 
+--inline void
+-+void
+- aes_expand_decryption_key(const v128_t *key, 
+- 			  aes_expanded_key_t expanded_key) {
+-   int i;
+-diff -rupN ../srtp_old/crypto/include/aes.h ./crypto/include/aes.h
+---- ../srtp_old/crypto/include/aes.h	2011-09-06 10:09:18.000000000 +0200
+-+++ ./crypto/include/aes.h	2011-09-06 10:03:53.000000000 +0200
+-@@ -55,11 +55,11 @@
+- 
+- typedef v128_t aes_expanded_key_t[11];
+- 
+--inline void
+-+void
+- aes_expand_encryption_key(const v128_t *key,
+- 			  aes_expanded_key_t expanded_key);
+- 
+--inline void
+-+void
+- aes_expand_decryption_key(const v128_t *key,
+- 			  aes_expanded_key_t expanded_key);
+- 
+-diff -rupN ../srtp_old/crypto/math/datatypes.c ./crypto/math/datatypes.c
+---- ../srtp_old/crypto/math/datatypes.c	2011-09-06 10:09:18.000000000 +0200
+-+++ ./crypto/math/datatypes.c	2011-09-06 10:02:55.000000000 +0200
+-@@ -124,7 +124,7 @@ octet_string_hex_string(const void *s, i
+-   return bit_string;
+- }
+- 
+--inline int
+-+static int
+- hex_char_to_nibble(uint8_t c) {
+-   switch(c) {
+-   case ('0'): return 0x0;
+++static void
++ aes_icm_advance_ismacryp(aes_icm_ctx_t *c, uint8_t forIsmacryp) {
++   /* fill buffer with new keystream */
++   v128_copy(&c->keystream_buffer, &c->counter);
diff --git a/submodules/build/builders.d/zrtp.mk b/submodules/build/builders.d/zrtp.mk
index 49088d1a4..2dcc70ccf 100644
--- a/submodules/build/builders.d/zrtp.mk
+++ b/submodules/build/builders.d/zrtp.mk
@@ -2,6 +2,7 @@
 #Thus the use of a toolchain file.
 TC = -DCMAKE_TOOLCHAIN_FILE=$(BUILDER_SRC_DIR)build/iphone-toolchain.cmake$(tc_proc)
 $(BUILDER_BUILD_DIR)/$(zrtpcpp_dir)/Makefile:
+	cp $(BUILDER_SRC_DIR)/build/builders.d/zrtpcpp.CMakeLists.txt $(BUILDER_SRC_DIR)/$(zrtpcpp_dir)/CMakeLists.txt
 	mkdir -p $(BUILDER_BUILD_DIR)/$(zrtpcpp_dir)
 	cd $(BUILDER_BUILD_DIR)/$(zrtpcpp_dir)/\
         && host_alias=$(host) . $(BUILDER_SRC_DIR)/build/$(config_site) \
@@ -10,7 +11,7 @@ $(BUILDER_BUILD_DIR)/$(zrtpcpp_dir)/Makefile:
 
 ifeq ($(enable_zrtp),yes)
 
-build-zrtpcpp: $(BUILDER_BUILD_DIR)/$(zrtpcpp_dir)/Makefile build-openssl
+build-zrtpcpp: $(BUILDER_BUILD_DIR)/$(zrtpcpp_dir)/Makefile
 	echo "Build ZRTP - prefix $(prefix)"
 	cd $(BUILDER_BUILD_DIR)/$(zrtpcpp_dir) && make && make install
 
diff --git a/submodules/build/builders.d/zrtpcpp.CMakeLists.txt b/submodules/build/builders.d/zrtpcpp.CMakeLists.txt
new file mode 100755
index 000000000..4f20891f6
--- /dev/null
+++ b/submodules/build/builders.d/zrtpcpp.CMakeLists.txt
@@ -0,0 +1,169 @@
+# Copyright (C) 2009 Werner Dittman
+#
+# This file is free software; as a special exception the author gives
+# unlimited permission to copy and/or distribute it, with or without
+# modifications, as long as this notice is preserved.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+#
+cmake_minimum_required(VERSION 2.6)
+
+PROJECT(libzrtpcpp)
+
+SET(CPACK_PACKAGE_VERSION_MAJOR 2)
+SET(CPACK_PACKAGE_VERSION_MINOR 0)
+SET(CPACK_PACKAGE_VERSION_PATCH 0)
+
+set (VERSION 2.0.0)
+set (SOVERSION 2)
+set (PACKAGE libzrtpcpp)
+
+if(MSVC60)
+    set(BUILD_STATIC ON CACHE BOOL "static linking only" FORCE)
+    MARK_AS_ADVANCED(BUILD_STATIC)
+else()
+    option(BUILD_STATIC "Set to OFF to build shared libraries" ON)
+endif()
+
+# set to true for debug and trace during CMakeLists development
+set(CMAKE_VERBOSE_MAKEFILE FALSE)
+
+MESSAGE( STATUS "Configuring GNU ${PROJECT_NAME} ${VERSION}...")
+
+# include most of the fine stuff we need
+include(cmake/Modules/FindGcryptConfig.cmake)
+include(FindPkgConfig)
+include(CheckLibraryExists)
+include(CheckIncludeFiles)
+include(cmake/Modules/AutoArgs.cmake)
+
+if(${PROJECT_NAME} STREQUAL ${CMAKE_PROJECT_NAME})
+    include(cmake/Modules/GeneratePackage.cmake)
+
+    GENERATE_PACKAGING(${PACKAGE} ${VERSION})
+endif()
+
+# check the -Denable-ccrtp setting, defaults to true
+enable_arg(ccrtp true "Enable GNU ccRTP support for GNU ZRTP")
+args_help()
+
+# this caused problems in debian where it has to always be lib....
+set(LIBDIRNAME "lib")
+if (NOT EXISTS /etc/debian_version)
+    if ( "${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "x86_64" )
+        set(LIBDIRNAME "lib64")
+    endif()
+endif()
+
+# setup the Thread include and lib
+find_package(Threads)
+if(CMAKE_HAVE_PTHREAD_H)
+  set(HAVE_PTHREAD_H TRUE)
+endif()
+set(LIBS ${LIBS} ${CMAKE_THREAD_LIBS_INIT})
+
+if(enable_ccrtp)
+    if (USES_CCRTP_INCLUDE_DIRS)
+        message(STATUS "  Using local commoncpp dependency")
+    else()
+        find_package(PkgConfig)
+        pkg_check_modules(USES_CCRTP libccrtp>=2.0.0)
+    endif()
+    include_directories(${USES_CCRTP_INCLUDE_DIRS})
+    link_directories(${USES_CRTP_LIBRARY_DIRS})
+    add_definitions(${USES_CCRTP_CFLAGS})
+    set (LIBS ${LIBS} ${USES_CCRTP_LDFLAGS} ${USES_CCRTP_LIBRARIES})
+endif()
+
+if (CMAKE_CROSSCOMPILING)
+  include_directories(${CMAKE_INSTALL_PREFIX}/include)
+  link_directories(${CMAKE_INSTALL_PREFIX}/lib)
+  set(CMAKE_REQUIRED_INCLUDES "${CMAKE_REQUIRED_INCLUDES} ${CMAKE_INSTALL_PREFIX}/include")
+##  set(CMAKE_REQUIRED_LIBRARIES "${CMAKE_INSTALL_PREFIX}/lib/*")
+endif()
+
+
+# now get info about crypto libraries
+gcr_check(GCRYPT gcrypt)
+#if(GCRYPT_FOUND)
+#  check_include_files(gcrypt.h HAVE_GCRYPT_H)
+#  set(LIBS ${LIBS} ${GCRYPT_LIBRARIES})
+#  set(BUILD_REQ "libgcrypt-devel")
+#  set(CRYPTOBACKEND="")
+#  set(PACKAGE_REQ "libgcrypt")
+#else()
+  pkg_check_modules(OPENSSL libcrypto>=0.9.8)
+  if (OPENSSL_FOUND)
+    check_include_files(openssl/bn.h HAVE_OPENSSL_BN_H)
+    check_include_files(openssl/aes.h HAVE_OPENSSL_AES_H)
+    check_include_files(openssl/sha.h HAVE_OPENSSL_SHA_H)
+    set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -lcrypto")
+    check_library_exists(crypto EVP_CipherInit_ex "${CMAKE_INSTALL_PREFIX}/lib" HAVE_SSL_CRYPT)
+# don't test HAVE_SSL_CRYPT_FOUND as it doesn't work
+    if (HAVE_OPENSSL_BN_H_FOUND)
+# AND HAVE_OPENSSL_AES_H_FOUND AND HAVE_OPENSSL_SHA_H_FOUND))
+      message(FATAL_ERROR "Openssl crypto library not found")
+    endif()
+    set(LIBS ${LIBS} -lcrypto)
+    set(CRYPTOBACKEND "libcrypto >= 0.9.8")
+    set(BUILD_REQ "libopenssl-devel >= 0.9.8")
+    set(PACKAGE_REQ "libopenssl >= 0.9.8")
+  else()
+    message(FATAL_ERROR "No crypto library found")
+  endif()
+#endif()
+
+check_include_files(stdlib.h HAVE_STDLIB_H)
+check_include_files(string.h HAVE_STRING_H)
+
+# necessary and required modules checked, ready to generate config.h
+configure_file(config.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config.h)
+
+# the following set(...) commands are only to have backward
+# compatibility with autoconf stuff to generate the pc file
+set(prefix ${CMAKE_INSTALL_PREFIX})
+set(exec_prefix ${prefix}/bin)
+set(libdir ${prefix}/lib)
+set(includedir ${prefix}/include)
+set(PACKAGE pkgconfig)
+configure_file(libzrtpcpp.pc.cmake ${CMAKE_CURRENT_BINARY_DIR}/libzrtpcpp.pc @ONLY)
+
+configure_file(libzrtpcpp.spec.cmake ${CMAKE_CURRENT_BINARY_DIR}/libzrtpcpp.spec @ONLY)
+
+include_directories(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/src)
+
+add_definitions(-g -O2 -fno-strict-aliasing)
+if(CMAKE_COMPILER_IS_GNUCXX)
+  add_definitions(-Wno-long-long -Wno-char-subscripts)
+  add_definitions(-Wall -ansi -pedantic)
+  add_definitions(-DNEW_STDCPP)
+#  add_definitions(-D__EXPORT=)
+endif()
+
+add_subdirectory(src)
+
+if (enable_ccrtp)
+	add_subdirectory(demo)
+endif()
+
+if (NOT EXISTS ${CMAKE_CURRENT_BINARY_DIR}/package/)
+    MESSAGE(STATUS "package dir not found")
+    file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/package/)
+endif()
+
+########### install files ###############
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libzrtpcpp.pc DESTINATION ${LIBDIRNAME}/pkgconfig)
+
+if(${PROJECT_NAME} STREQUAL ${CMAKE_PROJECT_NAME})
+
+    ########### Add uninstall target ###############
+    configure_file(
+    "${CMAKE_CURRENT_SOURCE_DIR}/cmake/cmake_uninstall.cmake.in"
+    "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
+    IMMEDIATE @ONLY)
+    add_custom_target(uninstall
+    "${CMAKE_COMMAND}" -P "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake")
+
+endif()