What Is Secure Neighbor Discovery Protocol (SEND Protocol)?

When it comes to security, Neighbor Discovery Protocol (NDP) is a slacker. NDP is the protocol used in IPv6 for discovering neighboring nodes on the local link. It determines the link-layer addresses of other nodes, finds available routers, maintains reachability information, performs address resolution and detects address duplication. It doesn't offer much protection against spoofing or other malicious activity—and that's where we come in. An innovative approach to securing NDP messages is called cryptographically generated addresses (CGA). CGA helps protect against neighbor/solicitation/advertisement spoofing and neighbor unreachability detection failure. DOS attacks, router solicitation, advertisement, and replay attacks encrypt NDP messages with a unique signature. Other nodes on your network can verify this signature so they know you're sending them encrypted data they can trust. It's like having an army of robots standing guard at all times! As we all know, NDP is the network discovery protocol used by IPv6. It's also a great way to get information about your neighbors and their devices. It's more than just useful for that! It also helps you determine if your neighbor uses a vulnerable router or if malware has compromised their device. Don't forget: if your neighbor uses an insecure router, you could be in danger too! NDP can be easily attacked by hackers who want to steal your data or infect your device with malware. The original NDP specifications called for using IPsec to protect NDP messages. However, the number of manually configured security applications needed to protect NDP can be huge, making that approach impractical for most purposes.No public-key infrastructure is required! Let's say you're a potential attacker and want to send a message. You can get a certificate for your public key, but it won't work for anything other than the messages you send. You can still sign your letters, however! Just not with your certificates.