For many years, when it came to email, the only solution was something known as PGP, which was quite complicated and only accessible to the tech-savvy.
수 년동안 이메일에 대해서 PGP라는 방법이 유일했는데 매우 복잡해서, 기술에 능통한 사람들만 다룰 수 있었습니다.