Authorship of the Petrine epistles
The authorship of the Petrine epistles (1 Peter and 2 Peter) is a question in biblical criticism, parallel to that of the authorship of the Pauline epistles, in which scholars have sought to determine the exact authors of the New Testament letters. The vast majority of biblical scholars think the two epistles do not share the same author, due to wide differences in Greek style and views between the two letters.
Source: Wikipedia — Authorship of the Petrine epistles (CC BY-SA 4.0)