People who are experts are sometimes called hackers.

VOA: special.2010.08.01

In the movies, hackers break into every system so easily in a few seconds.

在电影里，黑客用几秒钟的时间就能轻而易举地入侵各个系统。

理想是当密码专家 - SpeakingMax英语口语达人

During the interview, Brennan was also asked about the threat posed by hackers seeking to infiltrate computer networks.

VOA: standard.2010.02.07