There have been several cybersecurity enhancements in IPv6, due to being a necessary improvement on IPv4. The first is IPsec, which provides confidentiality, integrity, authentication, and encryption for packets and packet traffic. Another feature is its much larger, 128-bit address space, which can protect against address scanning and exhaustion. Quality of life features like improved Network Address Translation, Stateless Address Autoconfiguration, and Secure Neighbor Discovery also streamline connectivity, improve network security significantly, and protect against spoofing and impersonation. These and many other features are at the forefront of IPv6’s foundation.

However, while IPv6 is a beneficial tool for business and maintaining security, implementation has been difficult in the public and private sectors. A primary concern is implementation and the difficulties that come with it. The first difficulty would be cost, as organizations may not feel the amount of time and resources to implement it would be worthwhile. The next sector would be implementing it onto legacy hardware and software, which have the potential to cause system and additional security issues. If the implementation is not handled with care, there will be even further challenges, which is why IPv6 hasn’t been as integrated into the public and private sectors.

https://cybersecurity-magazine.com/ipv6-security-part-2/

https://www.tutorialspoint.com/the-slow-adoption-of-ipv6-and-dnssec