In communications security, phone freak ; a person fascinated by the telephone system. Commonly, a phreak is an individual who uses personal knowledge of the telephone system to make calls at the expense of another.

• 在通信保密学中,phone freak的合成,指一种对电话系统极感兴趣的人。通常他们利用自己对电话系统的了解,盗用他人帐号打电话。