diff --git a/libretroshare/src/pgp/pgpkeyutil.cc b/libretroshare/src/pgp/pgpkeyutil.cc
index 50fca0482..b4e2161c2 100644
--- a/libretroshare/src/pgp/pgpkeyutil.cc
+++ b/libretroshare/src/pgp/pgpkeyutil.cc
@@ -121,13 +121,13 @@ std::string PGPKeyParser::extractRadixPartFromArmouredKey(const std::string& pgp
 std::string PGPKeyManagement::makeArmouredKey(const unsigned char *keydata,size_t key_size,const std::string& version_string)
 {
 	std::string outstring ;
-	Radix64::encode((const char *)keydata,key_size,outstring) ;
+	Radix64::encode(keydata,key_size,outstring) ;
 
 	uint32_t crc = compute24bitsCRC((unsigned char *)keydata,key_size) ;
 
 	unsigned char tmp[3] = { uint8_t((crc >> 16) & 0xff), uint8_t((crc >> 8) & 0xff), uint8_t(crc & 0xff) } ;
 	std::string crc_string ;
-	Radix64::encode((const char *)tmp,3,crc_string) ;
+	Radix64::encode(tmp,3,crc_string) ;
 
 #ifdef DEBUG_PGPUTIL
 	std::cerr << "After signature pruning: " << std::endl;
diff --git a/libretroshare/src/pgp/rscertificate.cc b/libretroshare/src/pgp/rscertificate.cc
index 21eaeee0e..9f78a78de 100644
--- a/libretroshare/src/pgp/rscertificate.cc
+++ b/libretroshare/src/pgp/rscertificate.cc
@@ -109,7 +109,7 @@ std::string RsCertificate::toStdString() const
 
 	std::string out_string ;
 
-	Radix64::encode((char *)buf, p, out_string) ;
+	Radix64::encode(buf, p, out_string) ;
 
 	// Now slice up to 64 chars.
 	//
diff --git a/libretroshare/src/rsserver/p3peers.cc b/libretroshare/src/rsserver/p3peers.cc
index d5d55c53e..48ea46a7c 100644
--- a/libretroshare/src/rsserver/p3peers.cc
+++ b/libretroshare/src/rsserver/p3peers.cc
@@ -1083,12 +1083,12 @@ bool p3Peers::GetPGPBase64StringAndCheckSum(	const RsPgpId& gpg_id,
 	if(!AuthGPG::getAuthGPG()->exportPublicKey(gpg_id,mem_block,mem_block_size,false,false))
 		return false ;
 
-	Radix64::encode((const char *)mem_block,mem_block_size,gpg_base64_string) ;
+	Radix64::encode(mem_block,mem_block_size,gpg_base64_string) ;
 
 	uint32_t crc = PGPKeyManagement::compute24bitsCRC((unsigned char *)mem_block,mem_block_size) ;
 
 	unsigned char tmp[3] = { uint8_t((crc >> 16) & 0xff), uint8_t((crc >> 8) & 0xff), uint8_t(crc & 0xff) } ;
-	Radix64::encode((const char *)tmp,3,gpg_base64_checksum) ;
+	Radix64::encode(tmp,3,gpg_base64_checksum) ;
 
 	delete[] mem_block ;
 
diff --git a/libretroshare/src/util/radix64.h b/libretroshare/src/util/radix64.h
index 0125fa5d7..dc7f8528c 100644
--- a/libretroshare/src/util/radix64.h
+++ b/libretroshare/src/util/radix64.h
@@ -101,7 +101,7 @@ again:
 		/****************
 		 * create a radix64 encoded string.
 		 */
-		static void encode(const char *data,int len,std::string& out_string)
+		static void encode(const unsigned char *data,int len,std::string& out_string)
 		{
 			char *buffer, *p;
 
diff --git a/libretroshare/src/util/rsrecogn.cc b/libretroshare/src/util/rsrecogn.cc
index 0f5fc0504..4ce5f5ef9 100644
--- a/libretroshare/src/util/rsrecogn.cc
+++ b/libretroshare/src/util/rsrecogn.cc
@@ -486,7 +486,9 @@ bool	RsRecogn::itemToRadix64(RsItem *item, std::string &radstr)
 
 	/* write out the item for signing */
 	uint32_t len = serialiser.size(item);
-	char *buf = new char[len];
+    
+    	RsTemporaryMemory buf(len) ;
+        
 	if (!serialiser.serialise(item, buf, &len))
 	{
 		return false;
@@ -609,7 +611,7 @@ bool RsRecogn::createTagRequest(const RsTlvSecurityKey &key, const RsGxsId &id,
 	/* write out the item for signing */
 	RsGxsRecognSerialiser serialiser;
 	uint32_t len = serialiser.size(item);
-	char *buf = new char[len];
+    RsTemporaryMemory buf(len) ;
 	bool serOk = serialiser.serialise(item, buf, &len);
 
 	if (serOk)
@@ -617,8 +619,6 @@ bool RsRecogn::createTagRequest(const RsTlvSecurityKey &key, const RsGxsId &id,
 		Radix64::encode(buf, len, tag);
 	}
 
-	delete []buf;
-
 	if (!serOk)
 	{
 #ifdef DEBUG_RECOGN