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Ipv6 is the next generation ip address for computers and it use 128 bit.
A good way to solve the public key distribution problem tipical of
asymmetric-key enchription is to produce a couple of 128 bit key
(public-private). Then ask for a static ipv6 address equal to the public
key. If someone
want to sent an encrypted me to the address, he just
encrypt with his ipv6 address..
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Annotation:
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Cryptographic algorithms usually produce random-looking keys, but IP addresses have to have structure, to allow the routing to work. |
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(The reason for widening IP addresses to 128 bits is not because anyone seriously thinks that we might one day have 2^128 computers on the network. Instead it's to provide more opportunities for subnetting, route aggregation, etc.) |
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However there may be an application here related to identity-based encryption; a 128 bit IPv6 address is certainly large enough to use as a public key in an IBE scheme. |
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