Alpine Linux
Alpine Linux is a community developed operating system designed for routers, firewalls, VPNs, VoIP boxes, containers, and servers. It was designed with security in mind; it has proactive security features like PaX and SSP that prevent security holes in the software to be exploited.
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iDeal OS
iDeal is an MX Linux-based distribution, with various privacy and security settings enabled by default. Privacy and security are the main stated goal of the project, offering to surf, shop, trade and bank online with peace of mind, without advertisements, tracking, logging, bugs, viruses or unwanted disclosure of personal information.