[LEAPSECS] crc-8?

[Warner Losh]

> On Jan 23, 2015, at 1:19 PM, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
> 
> --------
> In message <F81CDAC7-5484-48DD-88DB-D2AF1D02D129 at bsdimp.com>, Warner Losh write
> s:
> 
>> The CRC shows that you have internally consistent data. It really only
>> catches DNS servers that tell lies for the purpose of redirecting traffic.
>> It wouldn’t catch a crafty DNS server that was telling a coherent lie
>> for nefarious purposes.
> 
> Uhm, that crafty DNS server would surely be able to come up with a new
> non-eyebrow-raising CRC8 value as well...

That’s my point. If someone wanted to lie to you about the number of
leap seconds, rather than just tell a general lie about an IP address,
the CRC won’t protect you.

Warner