Per Thorsheim Per Thorsheim is an independent security adviser based in Bergen, Norway. He told the world about the Linkedin breach in June 2012. As well as running his blog, he is the founder and main organizer of Passwordscon, a conference devoted to passwords, which has been his main interest for 13+ years. He is also proud to be certified CISA, CISM and CISSP-ISSAP.


Per Thorsheim

4 Stories by Per Thorsheim

LinkedIn’s poor handling of 2012 data breach comes back to haunt it

Four years after LinkedIn’s security was found wanting, and hackers stole a database containing millions of users’ details, the nightmare isn’t over.

Guest contributor Per...

2 4 min read

The Ashley Madison hack – further thoughts on its aftermath

As bogus news reports claim that an Ashley Madison user has killed himself in the aftermath of the data breach, Per Thorsheim shares some...

15 3 min read

Don’t judge Ashley Madison users too quickly, their accounts may be fake

Ashley Madison’s user database, if it ever appears in public, doesn’t prove anything.

Don’t be too quick to judge, says Per Thorsheim.

33 2 min read

Protecting private email on the internet from eavesdroppers

Independent security expert Per Thorsheim calls for more mail servers to beef up their security – by adopting STARTTLS to prevent email eavesdropping.

2 2 min read