High Quality Content by WIKIPEDIA articles! A Cryptographically Generated Address (CGA) is an Internet Protocol Version 6 (IPv6) address that has a host identifier computed from a cryptographic one-way hash function. This procedure is a method for binding a public signature key to an IPv6 address in the Secure Neighbor Discovery Protocol (SEND).A Cryptographically Generated Address is formed by replacing the least-significant 64 bits of the 128-bit IPv6 address by the cryptographic hash of the public key of the address owner. The messages are signed by the corresponding private key. Only if the source address and the public key are known, the verifier can authenticate the message from that corresponding sender. This method requires no public-key infrastructures. Valid CGAs may be generated by any sender, including a potential attacker, but they cannot use any existing CGAs.

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