Anne-Elisabeth Falkevik Hagen, 68, has been missing since October 31, chief investigator Tommy Broeske said on Wednesday, with police saying she was abducted "against her will". Police had urged the family not to pay any ransom.
Tom Hagen has an estimated net worth of 1.7 billion NOK (c. 200m USD), and is ranked 172 on Norway's rich list. It is the country's first kidnap for crypto ransom.
Police have been investigating the case discreetly for several weeks but chose to make it public in the hope that someone would come forward with information, Broske said.
The Halloween-day kidnapping of the Norwegian tycoon Tom Hagen's wife has taken a quirky turn as police have revealed that the tech-savvy kidnappers are demanding payment in cryptocurrency.
According to the local newspaper, VG, Anne-Elisabeth Falkevik Hagen, wife of one of Norway's richest men, Tom Hagen, went missing over ten weeks ago, since October 31, 2018.
Tommy Broeske, a Police Inspector said that, at present, their goal is to find the missing woman "alive and reunite her with the family".
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The paper reported that it appeared the 68-year-old had been abducted from her bathroom of her home in Lorenskog and that there had been "limited dialogue" with her captors over the internet.
Those behind the abduction "have chosen to communicate digitally and we have had no other type of contact", Broeske said.
Police were due to give a press conference on the matter later Wednesday.
He declined to say whether such a process could eventually lead to a ransom being paid. The report also explains that Norwegian police have widened the investigation to include Interpol and Europol.
Police believe she disappeared from the couple's home, 31 miles from the Swedish border.
Many Norwegian media outlets knew of Mrs Falkevik Hagen's disappearance but did not publish any details after the police warned against publicising the kidnap over fears the attackers would harm the victim.