In December, Kalix municipality was paralyzed by a hacker attack.

Computers were locked and the municipality was forced to work analogously.

Umeå municipality has seen similar, smaller, attempts and believes that the risk picture for IT attacks from, above all, organized crime has been high for many years.

Russia's invasion of Ukraine has made the situation more tense.

- It is definitely an increased risk picture.

We receive information from MSB, the County Administrative Board, CERT.se and other actors, says Petter Lindgren, head of IT operations.

Physical keys

Unlike Kalix, Umeå municipality has significantly increased its IT security.

A year ago, Umeå was one of the first municipalities to exchange passwords for physical "keys" - something that Petter Lindgren believes will become more common.

The principle with the "keys" is simple - see more in the clip.