Apple Inc. (NASDAQ:AAPL) has ended the employment contract of the famous hacker Nicholas Allegra aka Comex, a 20-year old student of Brown University. Apple Inc. (NASDAQ:AAPL) had hired Allegra as an intern in August 2011, after he rose to fame by developing the “Jailbreaking” tools for iOS, such as JailBreakMe 2 and JailBreakMe 3.

Apple’s iOS is one of the securest operating systems in the market, and it restricts users to downloading only from Apple’s official app store. These jailbreaking tools completely defeated the security measures of iOS, and allowed users to liberate their phones. Millions of iPhone and iPad users visited Allegra’s website to get rid of the restrictions.

Apple Comex

Allegra had two internships at Apple Inc. (NASDAQ:AAPL)- one during the fall last year and another over the past summer. In Cupertino, Allegra was a highly sought-after member of the jailbreaking community. He regularly publicized the security vulnerabilities in Apple products.

However, Allegra revealed today that Apple ended his employment last week. He tweeted, “So… no point in delaying. As of last week, after about a year, I’m no longer associated with Apple.” In a follow-up tweet, he told the reason “As for why? Because I forgot to reply to an email.”

His departure is a huge disappointment for iPhone users, who are eagerly waiting for a tool to crack iOS6. It is extremely difficult for the jailbreaking community to break iOS 6, because Apple Inc. (NASDAQ:AAPL) has further tightened the security measures. As for the e-mail he didn’t reply to,  it was about extending his employment at Apple. The Cupertino-based company is extremely serious about communications. When Allegra didn’t respond to the original e-mail, he was notified that the employment offer had been rescinded.

When talking to Forbes, he said it wasn’t a bad ending, after all. When asked about his future plans, Allegra said he would now focus on his studies at Brown University, and he doesn’t want to work on a new jailbreaking tool anytime soon.

Tech companies are increasingly hiring hackers. Last month, Twitter hired Charlie Miller, also famous for hacking Apple Inc. (NASDAQ:AAPL) software.