message: added : in function toString in class IVCiphertext
diff: @@ -375,7 +375,7 @@ public:
  string toString() override {
  const byte * uc = &(iv[0]);
  - return cipher->toString() + string(reinterpret_cast<char const*>(uc), iv.size());
  + return cipher->toString() + ":" + string(reinterpret_cast<char const*>(uc), iv.size());
  };
  void initFromString(const string & s) override {
  