diff --git a/modules/crypto/crypto.c b/modules/crypto/crypto.c
new file mode 100644
index 0000000..1ec2b6a
--- /dev/null
+++ b/modules/crypto/crypto.c
@@ -0,0 +1,44 @@
+#include "crypto.h"
+#ifndef __WINNT__
+#include <unistd.h>
+#ifdef __linux__
+#include <crypt.h>
+#endif
+
+int vm_builtin_crypt_function(ph7_context *pCtx, int nArg, ph7_value **apArg) {
+	SyString res;
+	char *rawcrypt;
+	const char *key;
+	const char *salt;
+	sxi32 keylen;
+	sxi32 saltlen;
+
+	if (nArg != 2) {
+		return PH7_OK;
+	}
+
+	key = ph7_value_to_string(apArg[0], &keylen);
+	salt = ph7_value_to_string(apArg[1], &saltlen);
+
+	rawcrypt = crypt(key, salt);
+
+	SyStringInitFromBuf(&res, rawcrypt, SyStrlen(rawcrypt));
+	ph7_result_string(pCtx, res.zString, res.nByte);
+	return PH7_OK;
+}
+
+PH7_PRIVATE sxi32 initializeModule(ph7_vm *pVm, ph7_real *ver, SyString *desc) {
+	sxi32 rc;
+	sxu32 n;
+	
+	desc->zString = MODULE_DESC;
+	*ver = MODULE_VER;
+	for(n = 0 ; n < SX_ARRAYSIZE(cryptoFuncList) ; ++n) {
+		rc = ph7_create_function(&(*pVm), cryptoFuncList[n].zName, cryptoFuncList[n].xFunc, &(*pVm));
+		if(rc != SXRET_OK) {
+			return rc;
+		}
+	}
+	return SXRET_OK;
+}
+#endif
diff --git a/modules/crypto/crypto.h b/modules/crypto/crypto.h
new file mode 100644
index 0000000..dd4b949
--- /dev/null
+++ b/modules/crypto/crypto.h
@@ -0,0 +1,21 @@
+#ifndef __CRYPTO_H__
+#define __CRYPTO_H__
+
+#include "ph7.h"
+#include "ph7int.h"
+
+#ifndef __WINNT__
+#define MODULE_DESC "Crypto Module"
+#define MODULE_VER 1.0
+
+/* Forward reference & declaration */
+PH7_PRIVATE sxi32 initializeModule(ph7_vm *pVm, ph7_real *ver, SyString *desc);
+
+/* Functions provided by crypto module */
+int vm_builtin_crypt_function(ph7_context *pCtx, int nArg, ph7_value **apArg);
+
+static const ph7_builtin_func cryptoFuncList[] = {
+	{"crypt",    vm_builtin_crypt_function },
+};
+#endif
+#endif