A resource that I have found that can support teaching students in primary years about information sharing and or safe communication is Big Fat Smile.

Big Fat Smile is a not-for-profit provider of child education, care, recreation, cultural and inclusive services in New South Wales and the Australian Capital Territory. Big Fat Smile exists for children and families, working to provide access to the highest quality early education and care in Australia. Their website is full of useful information on safe online communication and information sharing for children and parents aged 5-12 years of age.