There are no statements in the wp regarding security of lina core other than there will be a security audit. This should be one of the top priorities for obvious reasons.
They mentioned Reputation management in their whitepaper meaning that their will be security in their core because they wanted their reputation to be clean and trusted in order for their project to work and be known by every internet user. Maybe their busy highlighting their project in different country that's why they are not here to answers all of the questions here. I still have high hopes for this project to shoot up.