input metauml;
beginfig(1);
	Actor.alice("Alice");
	Actor.bob("Bob");
	
	Usecase.keyserver("Keyserver");
	Usecase.public("Verschlüsselung mit","Public-Key");
	Usecase.private("Entschlüsselung mit","Private-Key");
	
	drawObjects(alice,bob,keyserver,public,private);

	clink(association)(bob.human,keyserver);
	clink(association)(keyserver,alice.human);

	clink(association)(public,private);
	clink(association)(alice.human,public);
	clink(association)(private,bob.human);
endfig;
end