diff --git a/C_secure_coding/SecC++.zip b/C_secure_coding/SecC++.zip
new file mode 100644
index 0000000..d26e59e
Binary files /dev/null and b/C_secure_coding/SecC++.zip differ
diff --git a/C_secure_coding/SecC++/examples/adresses.c b/C_secure_coding/SecC++/examples/adresses.c
new file mode 100644
index 0000000..769c308
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/adresses.c
@@ -0,0 +1,18 @@
+#include <stdio.h>
+#include <string.h>
+
+void foo(void) {
+}
+
+int a = 12;
+
+int main(void) {
+	int b = 0;
+	char * a;
+	char * c;
+	strcpy(a, c);
+
+	printf("%p, %p, %p\n", &b, &a, foo);
+
+	return 0;
+}
diff --git a/C_secure_coding/SecC++/examples/data_race.cpp b/C_secure_coding/SecC++/examples/data_race.cpp
new file mode 100644
index 0000000..25aed7b
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/data_race.cpp
@@ -0,0 +1,30 @@
+#include <thread>
+#include <iostream>
+#include <cassert>
+#include <chrono>
+#include <mutex>
+
+int counter = 65535;
+std::mutex mtx = {};
+
+void worker(int delta) {
+	for (auto i = 0U; i < 100; ++i) {
+		std::this_thread::sleep_for(std::chrono::milliseconds(20));
+		// Zła praktyka! Zawsze rób to RAII!
+		// mtx.lock();
+		{ // Critical section
+			std::lock_guard<std::mutex> _(mtx);
+			counter += delta;
+		}  
+		// mtx.unlock();
+	}
+}
+
+int main() {
+	auto t1 = std::thread(worker, 1);
+	auto t2 = std::thread(worker, -1);
+
+	t2.join();
+	t1.join();
+	assert(counter == 65535);
+}
diff --git a/C_secure_coding/SecC++/examples/data_race_atomic.cpp b/C_secure_coding/SecC++/examples/data_race_atomic.cpp
new file mode 100644
index 0000000..395e0e6
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/data_race_atomic.cpp
@@ -0,0 +1,26 @@
+#include <thread>
+#include <iostream>
+#include <cassert>
+#include <chrono>
+#include <mutex>
+#include <atomic>
+
+std::atomic<int> counter = 65535;
+
+void worker(int delta) {
+	for (auto i = 0U; i < 100; ++i) {
+		std::this_thread::sleep_for(std::chrono::milliseconds(20));
+		counter.fetch_add(delta, std::memory_order_release);
+	}
+}
+
+int main() {
+	std::cout << "int is atomic? " << std::atomic<int>{}.is_lock_free() << '\n';
+
+	auto t1 = std::thread(worker, 1);
+	auto t2 = std::thread(worker, -1);
+
+	t2.join();
+	t1.join();
+	assert(counter == 65535);
+}
diff --git a/C_secure_coding/SecC++/examples/linking/function.c b/C_secure_coding/SecC++/examples/linking/function.c
new file mode 100644
index 0000000..94eb5f5
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/linking/function.c
@@ -0,0 +1,10 @@
+#include "function.h"
+#include <stdio.h>
+
+void foo(void) {
+	printf("Hello. I'm foo().\n");
+}
+
+void bar(void) {
+	printf("Hello. I'm bar().\n");
+}
diff --git a/C_secure_coding/SecC++/examples/linking/function.h b/C_secure_coding/SecC++/examples/linking/function.h
new file mode 100644
index 0000000..a7ad875
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/linking/function.h
@@ -0,0 +1,4 @@
+#pragma once
+
+void foo(void);
+void bar(void);
diff --git a/C_secure_coding/SecC++/examples/linking/main.c b/C_secure_coding/SecC++/examples/linking/main.c
new file mode 100644
index 0000000..19355da
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/linking/main.c
@@ -0,0 +1,7 @@
+#include "function.h"
+
+int main(void) {
+	//foo();
+	bar();
+	return 0;
+}
diff --git a/C_secure_coding/SecC++/examples/main.c b/C_secure_coding/SecC++/examples/main.c
new file mode 100644
index 0000000..fbb4a91
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/main.c
@@ -0,0 +1,9 @@
+#include <stdlib.h>
+
+int main(void) {
+	int * data = malloc(10000);
+	(void) data;
+
+	return 0;
+}
+
diff --git a/C_secure_coding/SecC++/examples/mario.c b/C_secure_coding/SecC++/examples/mario.c
new file mode 100644
index 0000000..f8a2cfc
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/mario.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+
+int main(void) {
+	int x = 0;
+	printf("%d, %d\n", x, ++x);
+	float b = 123.4f;
+	(void) b;
+
+	float a = 0.1;
+
+	if (a > 0.1) {
+		printf("Ups!\n");
+	}
+
+	return 0;
+}
diff --git a/C_secure_coding/SecC++/examples/move_sem.cpp b/C_secure_coding/SecC++/examples/move_sem.cpp
new file mode 100644
index 0000000..ef13240
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/move_sem.cpp
@@ -0,0 +1,61 @@
+#include <iostream>
+#include <string>
+
+class X {
+public:
+	explicit X(const std::string& name)
+		: name_ptr(new std::string(name)) {
+		std::cout << "Construct X name= " << *name_ptr << '\n';
+	}
+
+	// non copyable
+	X(const X& x) = delete;
+	X& operator=(const X& x) = delete;
+
+	void info() const {
+		std::cout << "info() in X\n";
+	}
+
+	X(X&& x) {
+		std::cout << "Move construct name = " << *(x.name_ptr) << '\n';
+		name_ptr = x.name_ptr;
+		x.name_ptr = nullptr;
+	}
+	X& operator=(X&& x) {
+		std::cout << "Move operator= name = " << *(x.name_ptr) << '\n';
+		if (name_ptr != nullptr) {
+			delete name_ptr;
+		}
+		name_ptr = x.name_ptr;
+		x.name_ptr = nullptr;
+		return *this;
+	}
+	~X() {
+		std::cout << "Destruct name= ";
+		if (name_ptr != nullptr) {
+			std::cout << *name_ptr;
+		} else { 
+			std::cout << "nullptr";
+		}
+		std::cout << '\n';
+		// Nadmiarowe i edukacyjne
+		if (name_ptr != nullptr) {
+			delete name_ptr;
+		}
+	}
+private:
+	std::string * name_ptr;
+};
+
+void foo(X&& my_x) {
+	std::cout << "In foo()\n";
+	my_x.info();
+}
+
+int main() {
+	auto x1 = X("DNA Myszy");	
+	auto x2 = std::move(x1);
+
+	foo(std::move(x2));
+	std::cout << "After foo()\n";
+}
diff --git a/C_secure_coding/SecC++/examples/move_sem_improv.cpp b/C_secure_coding/SecC++/examples/move_sem_improv.cpp
new file mode 100644
index 0000000..151c5b6
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/move_sem_improv.cpp
@@ -0,0 +1,53 @@
+#include <iostream>
+#include <string>
+#include <memory>
+
+class X {
+public:
+	explicit X(const std::string& name)
+		: name_ptr(std::make_unique<std::string>(name)) {
+		std::cout << "Construct X name= " << *name_ptr << '\n';
+	}
+
+	// non copyable
+	X(const X& x) = delete;
+	X& operator=(const X& x) = delete;
+
+	void info() const {
+		std::cout << "info() in X\n";
+	}
+
+	X(X&& x) {
+		std::cout << "Move construct name = " << *(x.name_ptr) << '\n';
+		name_ptr = std::move(x.name_ptr);
+	}
+	X& operator=(X&& x) {
+		std::cout << "Move operator= name = " << *(x.name_ptr) << '\n';
+		name_ptr = std::move(x.name_ptr);
+		return *this;
+	}
+	~X() {
+		std::cout << "Destruct name= ";
+		if (name_ptr != nullptr) {
+			std::cout << *name_ptr;
+		} else { 
+			std::cout << "nullptr";
+		}
+		std::cout << '\n';
+	}
+private:
+	std::unique_ptr<std::string> name_ptr;
+};
+
+void foo(X&& my_x) {
+	std::cout << "In foo()\n";
+	my_x.info();
+}
+
+int main() {
+	auto x1 = X("DNA Myszy");	
+	auto x2 = std::move(x1);
+
+	foo(std::move(x2));
+	std::cout << "After foo()\n";
+}
diff --git a/C_secure_coding/SecC++/examples/myrand.c b/C_secure_coding/SecC++/examples/myrand.c
new file mode 100644
index 0000000..54eba79
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/myrand.c
@@ -0,0 +1,3 @@
+int rand(void) {
+	return 42;
+}
diff --git a/C_secure_coding/SecC++/examples/option.cpp b/C_secure_coding/SecC++/examples/option.cpp
new file mode 100644
index 0000000..2d0a770
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/option.cpp
@@ -0,0 +1,24 @@
+#include <optional>
+#include <iostream>
+
+std::optional<int> my_div(int a, int b) {
+	if (b == 0) {
+		return {};
+	}
+	//return std::make_optional<int>(a / b);
+	return {a / b};
+}
+
+int main() {
+	auto opt = my_div(16, 0);
+	//if (opt.has_value()) {
+	if (opt) {
+		std::cout << "Correct!\n";
+		//std::cout << opt.value() << '\n';
+		std::cout << *opt << '\n';
+	} else {
+		std::cout << "Incorrect!\n";
+		// To jest terroryzm!
+		std::cout << *opt << '\n';
+	}
+}
diff --git a/C_secure_coding/SecC++/examples/prog1.c b/C_secure_coding/SecC++/examples/prog1.c
new file mode 100644
index 0000000..a5399ed
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/prog1.c
@@ -0,0 +1,13 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+
+int main(void) {
+	// To jest niebezpieczne!
+	srand(time(0));
+
+	int a = rand();
+	printf("%d\n", a);
+
+	return 0;
+}
diff --git a/C_secure_coding/SecC++/examples/shr_ptr.cpp b/C_secure_coding/SecC++/examples/shr_ptr.cpp
new file mode 100644
index 0000000..97f739a
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/shr_ptr.cpp
@@ -0,0 +1,51 @@
+#include <iostream>
+#include <string>
+#include <memory>
+
+
+class Airplane {
+public:
+	explicit Airplane(const std::string & name_)
+		: name{name_} {
+		std::cout << "Construct Airplane name = " << name << '\n';
+	}
+	const std::string & get_name() const {
+		return name;
+	}
+	~Airplane() {
+		std::cout << "Destruct Airplane name = " << name << '\n';
+	}
+private:
+	const std::string name;
+};
+
+// std::unique_ptr<Airplane> process_airplane(std::unique_ptr<Airplane> airplane);
+//
+// u_p_airplane = process_airpalne(std::move(u_p_airplane));
+
+
+int main() {
+	std::shared_ptr<Airplane> a1;
+	auto a2 = std::make_shared<Airplane>("DC8");
+
+	a1 = a2;
+
+	std::cout << a1->get_name() << '\n';
+	std::cout << a2->get_name() << '\n';
+
+	std::cout << "Count a1: " << a1.use_count() << " a2: " << a2.use_count() << '\n';
+
+	std::shared_ptr<Airplane> a3;
+	a3 = std::move(a1);
+
+	std::cout << "Count a1: " << a1.use_count()
+		<< " a2: " << a2.use_count() << " a3: " << a3.use_count() << '\n';
+
+	auto a4 = std::make_unique<Airplane>("Mig21");
+
+	std::shared_ptr<Airplane> a5;
+	a5 = std::move(a4);
+
+	u_p = std::move(s_p);
+}
+
diff --git a/C_secure_coding/SecC++/examples/struct.c b/C_secure_coding/SecC++/examples/struct.c
new file mode 100644
index 0000000..a924eb3
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/struct.c
@@ -0,0 +1,18 @@
+#include <stdio.h>
+struct X {
+	int data;
+};
+
+struct X process(void) {
+	struct X x;
+	x.data = 42;
+	return x;
+}
+
+int main(void) {
+	struct X x = process();
+	printf("%d\n", x.data);
+
+	return 0;
+
+}
diff --git a/C_secure_coding/SecC++/examples/taint.cpp b/C_secure_coding/SecC++/examples/taint.cpp
new file mode 100644
index 0000000..1f6ffff
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/taint.cpp
@@ -0,0 +1,16 @@
+
+enum class DataType {
+	Taint,
+	NotTaint
+};
+
+template<class DataType>
+struct Data {
+	int payload[200];
+};
+
+Data<NotTaint> foo(Data<Taint> data);
+
+void foo(Data<NotTaint> data);
+
+
diff --git a/C_secure_coding/SecC++/examples/unuq_ptr.cpp b/C_secure_coding/SecC++/examples/unuq_ptr.cpp
new file mode 100644
index 0000000..d06893b
--- /dev/null
+++ b/C_secure_coding/SecC++/examples/unuq_ptr.cpp
@@ -0,0 +1,50 @@
+#include <iostream>
+#include <string>
+#include <memory>
+
+
+class Airplane {
+public:
+	explicit Airplane(const std::string & name_)
+		: name{name_} {
+		std::cout << "Construct Airplane name = " << name << '\n';
+	}
+	const std::string & get_name() const {
+		return name;
+	}
+	~Airplane() {
+		std::cout << "Destruct Airplane name = " << name << '\n';
+	}
+private:
+	const std::string name;
+};
+
+void info(std::unique_ptr<Airplane> ptr) {
+	std::cout << "In info()\n";
+	std::cout << ptr->get_name() << '\n';
+	std::cout << "End of info()\n";
+}
+
+int main() {
+	std::unique_ptr<Airplane> a1;
+	{
+		auto a2 = std::make_unique<Airplane>("F22");
+
+		a1 = std::move(a2);
+
+		std::cout << "End of scope\n";
+	}
+	std::cout << "Out of scope\n";
+
+	std::cout << a1->get_name() << '\n';
+
+	auto a3 = std::make_unique<Airplane>("Pirat");
+
+	std::cout << "Before info()\n";
+	info(std::move(a3));
+
+	std::cout << "After info()\n";
+
+	std::cout << "End main()\n";
+}
+
diff --git a/C_secure_coding/SecC++/notes/ptr_container.png b/C_secure_coding/SecC++/notes/ptr_container.png
new file mode 100644
index 0000000..d9ce36b
Binary files /dev/null and b/C_secure_coding/SecC++/notes/ptr_container.png differ
diff --git a/C_secure_coding/SecC++/notes/ptr_struct.png b/C_secure_coding/SecC++/notes/ptr_struct.png
new file mode 100644
index 0000000..35655f1
Binary files /dev/null and b/C_secure_coding/SecC++/notes/ptr_struct.png differ
diff --git a/C_secure_coding/SecC++/notes/pure.png b/C_secure_coding/SecC++/notes/pure.png
new file mode 100644
index 0000000..11e84d1
Binary files /dev/null and b/C_secure_coding/SecC++/notes/pure.png differ
diff --git a/C_secure_coding/SecC++/notes/sec_rings.png b/C_secure_coding/SecC++/notes/sec_rings.png
new file mode 100644
index 0000000..5af5f5b
Binary files /dev/null and b/C_secure_coding/SecC++/notes/sec_rings.png differ
diff --git a/C_secure_coding/SecC++/notes/sec_surface.png b/C_secure_coding/SecC++/notes/sec_surface.png
new file mode 100644
index 0000000..8def682
Binary files /dev/null and b/C_secure_coding/SecC++/notes/sec_surface.png differ
diff --git a/C_secure_coding/SecC++/slides/C90_C99_Przegląd_mechanizmów.pdf b/C_secure_coding/SecC++/slides/C90_C99_Przegląd_mechanizmów.pdf
new file mode 100644
index 0000000..159dc57
Binary files /dev/null and b/C_secure_coding/SecC++/slides/C90_C99_Przegląd_mechanizmów.pdf differ
diff --git a/C_secure_coding/SecC++/slides/MITRE.pdf b/C_secure_coding/SecC++/slides/MITRE.pdf
new file mode 100644
index 0000000..8d3bf1a
Binary files /dev/null and b/C_secure_coding/SecC++/slides/MITRE.pdf differ
diff --git a/C_secure_coding/SecC++/slides/Modele_Bezpieczeństwa.pdf b/C_secure_coding/SecC++/slides/Modele_Bezpieczeństwa.pdf
new file mode 100644
index 0000000..1259879
Binary files /dev/null and b/C_secure_coding/SecC++/slides/Modele_Bezpieczeństwa.pdf differ
diff --git a/C_secure_coding/SecC++/slides/Modelowanie_Zagrożeń.pdf b/C_secure_coding/SecC++/slides/Modelowanie_Zagrożeń.pdf
new file mode 100644
index 0000000..5d5b6d9
Binary files /dev/null and b/C_secure_coding/SecC++/slides/Modelowanie_Zagrożeń.pdf differ
diff --git a/C_secure_coding/SecC++/wrap_function/Makefile b/C_secure_coding/SecC++/wrap_function/Makefile
new file mode 100644
index 0000000..70daea3
--- /dev/null
+++ b/C_secure_coding/SecC++/wrap_function/Makefile
@@ -0,0 +1,27 @@
+# Przykład "owinięcia" (wrap) / sastąpienia
+# pojedynczej funkcji przez linker
+# Uwaga na zamierzone włączenie #include "foo.c"
+# w test/foo.c
+.PHONY := clean
+
+CC := gcc
+
+CFLAGS := -Wall -Wextra -pedantic
+LDFLAGS :=
+OBJS := main.o foo.o
+
+WRAP_CFLAGS := $(CFLAGS)
+WRAP_LDFLAGS := $(LD_FLAGS) -Wl,-wrap=foo
+WRAP_OBJS := main.o
+WRAP_SRCDIR := tests
+
+all: main wrap
+
+main: $(OBJS)
+	$(CC) $(LDFLAGS) -o $@ $^
+
+wrap: $(WRAP_OBJS)
+	$(CC) $(WRAP_LDFLAGS) -o wrap $^ $(WRAP_SRCDIR)/foo.c -I$(WRAP_SRCDIR)
+
+clean:
+	@rm -f main wrap $(OBJS) $(WRAP_OBJS) > /dev/null 2>&1
diff --git a/C_secure_coding/SecC++/wrap_function/foo.c b/C_secure_coding/SecC++/wrap_function/foo.c
new file mode 100644
index 0000000..74784d9
--- /dev/null
+++ b/C_secure_coding/SecC++/wrap_function/foo.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+#include "foo.h"
+
+static int value = 42;
+
+void foo() {
+    printf("Original foo(), value = %d.\n", value);
+}
diff --git a/C_secure_coding/SecC++/wrap_function/foo.h b/C_secure_coding/SecC++/wrap_function/foo.h
new file mode 100644
index 0000000..7430abb
--- /dev/null
+++ b/C_secure_coding/SecC++/wrap_function/foo.h
@@ -0,0 +1,3 @@
+#pragma once
+
+void foo(void);
diff --git a/C_secure_coding/SecC++/wrap_function/main.c b/C_secure_coding/SecC++/wrap_function/main.c
new file mode 100644
index 0000000..a936e40
--- /dev/null
+++ b/C_secure_coding/SecC++/wrap_function/main.c
@@ -0,0 +1,6 @@
+#include <stdio.h>
+#include "foo.h"
+
+int main(void) {
+    foo();
+}
diff --git a/C_secure_coding/SecC++/wrap_function/tests/foo.c b/C_secure_coding/SecC++/wrap_function/tests/foo.c
new file mode 100644
index 0000000..410bc16
--- /dev/null
+++ b/C_secure_coding/SecC++/wrap_function/tests/foo.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+#include "../foo.c" /* !!!  */
+#include "foo.h"
+
+void __wrap_foo(void) {
+    printf("Wrap foo(), value = %d.\n", value);
+    printf("  ");
+    __real_foo();
+}
diff --git a/C_secure_coding/SecC++/wrap_function/tests/foo.h b/C_secure_coding/SecC++/wrap_function/tests/foo.h
new file mode 100644
index 0000000..780e4b0
--- /dev/null
+++ b/C_secure_coding/SecC++/wrap_function/tests/foo.h
@@ -0,0 +1,7 @@
+#pragma once
+
+extern int value;
+
+void foo(void);
+void __real_foo(void);
+void __wrap_foo(void);