>The full key is not there. There is only a key tag. Are you proposing a wire f
>ormat change to DNSSEC that puts the full key there? That would be hard and sl
>ow to deploy and use up value bytes of the limited +/- 1400 bytes.
>
>> Wouldn't that limit the risk of collision?
>
>At a price, yes.

Technically only a SHA-2 hash of the key would need to be there. If somebody
can create a SHA-2 hash collision then the world has bigger problems than
a DoS on DNSSEC validation.

However, changing RRSIG is probably not practical unless there are other
reason to change it.

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