On Thu, May 30, 2024 at 9:13 AM Alessandro Vesely <ves...@tana.it> wrote:
> z= saves all fields, which would be too much in most cases. Moreover, > doing so > suggests treating all fields as a whole, rather than dealing with each > one's > peculiarity. > That's not what the RFC says. Of course, if an Original- field is tampered with the original signature > won't > verify after replacing it, just like if you altered z=. But then, > reverting > without cooperation is not the same as doing it with active opposition. > Why > would someone alter Original- fields? A mediator wanting to disrupt the > possibility to reverse had better removing the signature directly. > Space munging applied to all fields, for example, is enough to break this scheme. "z=", by contrast, is immune to such mutations, because it's encoded. -MSK
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