I don't know PAIN...

[Raymond Lillard]

Ben Laurie wrote:
> Ian Grigg wrote:
>> What is the source of the acronym PAIN?
>> Lynn said:
>>> ... A security taxonomy, PAIN:
>>> * privacy (aka thinks like encryption)
>>> * authentication (origin)
>>> * integrity (contents)
>>> * non-repudiation
>>
>> I.e., its provenance?
>>
>> Google shows only a few hits, indicating
>> it is not widespread.
> 
> Probably because non-repudiation is a stupid idea: 
> http://www.apache-ssl.org/tech-legal.pdf.

OK, I'm a mere country mouse when it comes to cryptography,
so be kind.

I have read most of the above paper on non-repudiation and
noticed on p3 the following footnote:

"Note that there is no theoretical reason that it should be
possible to figure out the public key given the private key,
either, but it so happens that it is generally possible to
do so"

So what's this "generally possible" business about?
A few references will do.

Thanks,
Ray


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