Update security_models.tex

https://ru.wikipedia.org/wiki/%D0%9C%D0%BE%D0%B4%D0%B5%D0%BB%D1%8C_%D0%91%D0%B5%D0%BB%D0%BB%D0%B0_%E2%80%94_%D0%9B%D0%B0%D0%BF%D0%B0%D0%B4%D1%83%D0%BB%D1%8B