diff --git a/https/main.c b/https/main.c
new file mode 100644
index 0000000..d205fab
--- /dev/null
+++ b/https/main.c
@@ -0,0 +1,141 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <ulfius.h>
+
+#define ROUTE_HELLO "/hello"
+
+/**
+ * static read file function
+ */
+static char * read_file(const char * filename) {
+  char * buffer = NULL;
+  long length;
+  FILE * f;
+  if (filename != NULL) {
+    f = fopen (filename, "rb");
+    if (f) {
+      fseek (f, 0, SEEK_END);
+      length = ftell (f);
+      fseek (f, 0, SEEK_SET);
+      buffer = malloc ((size_t)(length + 1));
+      if (buffer != NULL) {
+        fread (buffer, 1, (size_t)length, f);
+        buffer[length] = '\0';
+      }
+      fclose (f);
+    }
+    return buffer;
+  } else {
+    return NULL;
+  }
+}
+
+/**
+ * callback functions declaration
+ */
+int callback_get_hello (const struct _u_request * request, struct _u_response * response, void * user_data);
+
+int callback_default (const struct _u_request * request, struct _u_response * response, void * user_data);
+
+int main(int argc, char *argv[]) {
+  /*declaration*/
+  struct _u_instance instance;
+  unsigned int port;
+  int ret;
+
+  printf("main() Started...\n");
+  if (argc < 2) {
+    fprintf(stderr, "Usage: %s <port>\n", argv[0]);
+    exit(1);
+  }
+
+  printf("main() argv[1]: %s\n", argv[1]);
+
+  /*store command line argument in int variable*/
+  /*validate user input*/
+  /*omit injection*/
+  /*stream:argv*/
+  ret = sscanf(argv[1], "%d", &port);
+
+  /*valid user input:1 successfully filled item*/
+  if (ret != 1) {
+    fprintf(stderr, "The argument must be an integer\n");
+    exit(1);
+  }
+
+  if (port < 0) {
+    fprintf(stderr, "Error passing a negative port\n");
+    exit(1);
+  }
+  printf("main() port: %d\n", port);
+
+  if (ulfius_init_instance(&instance, port, NULL, NULL) != U_OK) {
+    printf("main() Error ulfius_init_instance, abort");
+    return(1);
+  }
+
+  //TODO Why?
+  u_map_put(instance.default_headers, "Access-Control-Allow-Origin", "*");  
+
+  // Maximum body size sent by the client is 1 Kb
+  instance.max_post_body_size = 1024;
+
+  // Endpoint list declaration
+  ulfius_add_endpoint_by_val(&instance, "GET", ROUTE_HELLO, NULL, 0, &callback_get_hello, NULL);
+
+  // default_endpoint declaration
+  ulfius_set_default_endpoint(&instance, &callback_default, NULL);
+
+  // Start the framework
+  if (argc == 5 && strcmp("-secure", argv[2]) == 0) {
+    printf("main() https mode\n");
+    // If command-line options are -secure <key_file> <cert_file>, then open an https connection
+    char * key_pem = read_file(argv[3]);
+    char * cert_pem = read_file(argv[4]);
+    ret = ulfius_start_secure_framework(&instance, key_pem, cert_pem);
+    free(key_pem);
+    free(cert_pem);
+  } else {
+    printf("main() http mode\n");
+    // Open an http connection
+    ret = ulfius_start_framework(&instance);
+  }
+
+  if (ret == U_OK) {
+    printf("main() Start framework on port %d", instance.port);
+    
+    // Wait for the user to press <enter> on the console to quit the application
+    getchar();
+  } else {
+    printf("main() Error starting framework; frameworkRet: %d\n",ret);
+  }
+
+  printf("main() End framework\n");
+  
+  ulfius_stop_framework(&instance);
+  ulfius_clean_instance(&instance);
+
+  printf("main() Done.\n");
+
+  return 0;
+}
+    
+/**
+ * Callback function that put a "Hello World!" string in the response
+ */
+int callback_get_hello (const struct _u_request * request, struct _u_response * response, void * user_data) {
+  ulfius_set_string_body_response(response, 200, "Hello World!");
+  return U_CALLBACK_CONTINUE;
+}
+
+/**
+ * Default callback function called if no endpoint has a match
+ */
+int callback_default (const struct _u_request * request, struct _u_response * response, void * user_data) {
+  ulfius_set_string_body_response(response, 404, "Page not found, do what you want");
+  return U_CALLBACK_CONTINUE;
+}
diff --git a/https/makefile b/https/makefile
new file mode 100644
index 0000000..06166b4
--- /dev/null
+++ b/https/makefile
@@ -0,0 +1,24 @@
+# Docu
+#
+#$@ is the name of the file to be made
+#$? is the names of the changed dependents
+#$< the name of the related file that caused the action
+#$* the prefix shared by target and dependent files
+#
+# Others
+RM      = /bin/rm -f
+#
+# Source, Executable, Includes, Library Defines
+EXE    = main
+#
+# Compiler, Linker Defines
+CC      = /usr/bin/gcc
+#
+all: main.o
+	$(CC) main.c -L/usr/lib/x86_64-linux-gnu -lulfius -Wall -o $(EXE)
+#
+main.o:
+	$(CC) -c main.c
+# Clean Up Objects, Exectuables, Dumps out of source directory
+clean:
+	$(RM) *.o $(EXE) *~
diff --git a/https/readme.md b/https/readme.md
new file mode 100644
index 0000000..b6f12ba
--- /dev/null
+++ b/https/readme.md
@@ -0,0 +1,38 @@
+* install dependencies on Debian Bullseye
+```
+sudo apt install libulfius-dev --no-install-recommends
+```
+
+* build
+```
+make
+```
+
+* create self-signed key/certificate
+```
+openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -sha256 -days 365
+```
+
+* enter details
+```
+writing new private key to 'key.pem'
+Enter PEM pass phrase: serfaus
+Verifying - Enter PEM pass phrase:
+Country Name (2 letter code) [AU]:DE
+State or Province Name (full name) [Some-State]:Lower Saxony
+Locality Name (eg, city) []:Brunswick
+Organization Name (eg, company) [Internet Widgits Pty Ltd]:Software Ingenieur Begerad
+Organizational Unit Name (eg, section) []:IT
+Common Name (e.g. server FQDN or YOUR name) []:hello.swingbe.de
+Email Address []:admin@swingbe.de
+```
+
+* run in http mode
+```
+./main <port>
+```
+
+* run in https mode
+```
+./main <port> -secure <private key file> <certificate file>
+```