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.
My concern is actually that crypto currencies can be hacked. If lina is creating its own network for the tokens, they should take standard security measures.
I know that lina core is too hard to enter or access by a hacker. Yet we all knows that there is no imposible in the internet but lina team already made it more secured in order to have a difficulties in accessing their system.
Most hackers target the most popular in the website, i don't know why maybe they will earn from it,though in some part they just want to make them popular and some successful project hired the most popular in terms of accessing their system to make them full secure. Lina review will analyze it so that they will secure their system.