"I understand that many are very concerned right now, but we must continue to live our lives. It's precisely our open society that the terrorists want to destroy," Löfven said during an address on Thursday. "Sweden will never give in," he added.
Speaking to media, Löfven said his government would grant authorities wider remits to monitor data, that more surveillance cameras would be added at certain locations, and that biometric data will be checked in passports.
Löfven also reiterated that Sweden would push forward with outlawing so-called "terror trips", where people go to war zones to train, help or fight with known terrorist groups.
"It's completely unacceptable that people can take part in terrorism and return without being held responsible," Löfven said.
Löfven added that the government will extend border controls in southern and western Sweden until December 11th and he called for a united political front against terrorism.
"It's important that Sweden stands united. There is no room for partisan bickering. The government will therefore invite the parties on the right and the left to talks," Löfven said.
Speaking to Radio Sweden after the news conference, Aftonbladet columnist Lena Melin said she wasn not surprised by the proposed measures. She said they have been discussed before by security police and by intelligence services.
Melin also disagreed that the nation had been "naive" about possible attacks. "I don't think we have been more naive than any other country," she said.