diff --git a/src/pqc_encrypt.c b/src/pqc_encrypt.c
new file mode 100644
index 0000000..fd92ee2
--- /dev/null
+++ b/src/pqc_encrypt.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2014 FH Bielefeld
+ *
+ * This file is part of a FH Bielefeld project.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA  02110-1301  USA
+ */
+
+#include "pcq_encrypt.h"
+
+/*
+ * encrypt the msg, using the math:
+ * e = (h ∗ r) + m (mod q)
+ * 
+ * e = the encrypted poly
+ * h = the public key
+ * r = the random poly
+ * m = the message poly
+ * q = large mod
+ * 
+ * @param ctx ntru_context* the ntru context
+ * @param rnd pb_poly*   	the random poly
+ * @param msg pb_poly* 		the message to encrypt
+ * @param pubKey pb_poly* 	the public key
+ * @param out pb_poly* 		the output poly
+ */
+void pb_encrypt(ntru_context *ctx, 
+		pb_poly *rnd,
+		pb_poly *msg,
+		pb_poly *pubKey,
+		pb_poly *out) 
+{
+		mp_int *tmpOut;
+		mp_int *tmpMsg;
+		mp_int mp_mod;
+		
+		init_integer(&mp_mod);
+		MP_SET_INT(&mp_mod,(unsigned long)ctx->q);
+		
+		pb_starmultiply(pubKey, rnd, out, ctx, ctx->q);
+		
+		tmpOut = out->terms;
+		tmpMsg = msg->terms;
+		
+		for(unsigned int i = 0; i <= ctx->N-1; i++) {
+			mp_add(tmpOut,tmpMsg,tmpOut);
+			mp_mod(tmpOut,mp_mod,tmpOut);
+			
+			tmpOut++;
+			tmpMsg++;
+		}
+}
diff --git a/src/pqc_encrypt.h b/src/pqc_encrypt.h
new file mode 100644
index 0000000..7be7636
--- /dev/null
+++ b/src/pqc_encrypt.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2014 FH Bielefeld
+ *
+ * This file is part of a FH Bielefeld project.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA  02110-1301  USA
+ */
+
+#ifndef PQC_ENCRYPT_H
+#define PQC_ENCRYPT_H
+
+#include <tommath.h>
+#include <tompoly.h>
+#include "context.h"
+#include "poly.h"
+
+void pb_encrypt(ntru_context *ctx, 
+		pb_poly *rnd,
+		pb_poly *msg,
+		pb_poly *pubKey,
+		pb_poly *out);
+
+#endif /* PQC_ENCRYPT_H */