Apple-FBI Fight Caused a 20 Percent Spike in Sun Corp.’s Shares

Shares in Japan's Sun Corporation spiked over 20 percent on Thursday after reports that one of its subsidiaries, Israeli firm Cellebrite, is helping the U.S. Federal Bureau of Investigation (FBI) unlock an iPhone used by one of the San Bernardino shooters.

Justice Dept Finds FBI Abuse Of Patriot Act Provision
The seal of the F.B.I. hangs in the Flag Room at the bureau's headquaters March 9, 2007 in Washington, DC. F.B.I. Director Robert Mueller was responding to a report by the Justice Department inspector general that concluded the FBI had committed 22 violations in its collection of information through the use of national security letters. The letters, which the audit numbered at 47,000 in 2005, allow the agency to collect information like telephone, banking and e-mail records without a judicially approved subpoena. Chip Somodevilla / Getty Images

Toyko-listed Sun Corp closed up 20.13 percent at 895 yen, which analysts have attributed to the news. Cellebrite makes forensic software that allows "comprehensive mobile data extraction and decoding tools", according to the firm's website.

On Wednesday, Reuters reported that Cellebrite was helping the FBI unlock the iPhone belonging to San Bernardino shooter Syed Farook, citing the Yedioth Ahronoth newspaper. If successful, the FBI could bypass Apple and avoid an intense legal battle.

In February, a U.S. judge ordered Apple to help the FBI access break into the iPhone 5C used by Farook. At the time, Apple chief executive Tim Cook said the demands were "chilling" and the firm refused to create a "backdoor" into its software.

A hearing between the two parties was scheduled for Tuesday but postponed by a federal judge after the DOJ said it had found a third party to hack into the phone. The reports suggest that Cellebrite is that third party.

Neither Sun Corp nor Cellebrite responded to CNBC requests for comment.