Re: [cryptography] Information-theoretic cryptography for the masses

2013-06-25 Thread Oleksandr Nikitin
On 2013-06-25 16:25, Tom Ritter wrote:
> From a high level view this looks like it provides similar features as
> OTR + OTR's SMP.  Which works pretty well.
Thanks. Couple of points I worry about:
- Does the KS actually provide reasonable entropy? How can one measure
whether it really performs as advertised? When to terminate the
protocol? And so on. We still are "at least as good as RSA", though.
- Alice and Bob mutually depend on the quality of each others' one-time
RSA keys. Can this be somehow helped?

> 
> Well, actually, I have to say it works 'okay' because in practice I
> have to run SMP a couple of times with my partner until we hit upon
> the identical punctuation, capitalization, and question to which we
> both have the same unambiguous answer.
Yeah, it can be pretty annoying but I currently don't know of a better
mutual auth protocol :( Could be helped with a bit of "text
normalization" applied by both parties' software, I guess.

> 
> -tom
> 




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Re: [cryptography] Information-theoretic cryptography for the masses

2013-06-25 Thread Tom Ritter
>From a high level view this looks like it provides similar features as
OTR + OTR's SMP.  Which works pretty well.

Well, actually, I have to say it works 'okay' because in practice I
have to run SMP a couple of times with my partner until we hit upon
the identical punctuation, capitalization, and question to which we
both have the same unambiguous answer.

-tom
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[cryptography] Information-theoretic cryptography for the masses

2013-06-24 Thread Oleksandr Nikitin
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Hi everyone,

It has come to my mind that you can combine SMP (socialist
millionaires protocol) and Kish-Sethuraman protocol to get a protocol
which is both IT-secure and can be bootstrapped without all the key
management burden.

So, I tried to outline the way how exactly they should be combined and
what properties will the resulting construction have.

You can read the draft of the article here:

http://tvori.info/people/wizzard/writings/2013/nikitin-mits-draft.pdf

Since this is both my first TeX article and first contribution to the
cryptography field, any feedback is greatly appreciated.

Thanks!

- -- Oleksandr Nikitin
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