Thomas P Jakobsen writes:
> On Thu, Aug 12, 2010 at 12:06, Martin Geisler wrote:
>
>> Would it not be fairly easy to let each of the players secret share a
>> random integer, add all the shared numbers, open the result, and use
>> that as the computation ID? That is, a
agree on a
> computation id that has not been used before for that set of
> configuration files.
Would it not be fairly easy to let each of the players secret share a
random integer, add all the shared numbers, open the result, and use
that as the computation ID? That is, automate this so
quiet.
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ed when it starts and why the seed is chosen as a small integer.
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I will of course agree that it could be made more explicit :-)
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d now be
able to manage everything.
I will of course stick around if you guys need anything...
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> - If not, then the example apps would need to be updated accordingly.
I see Marcel answered this with lightning speed, cool! :-)
> I will, by the way, be available in #viff @ Freenode most of my time
> the next couple of days.
I'll like to add that it's very easy to get o
> Sorry if my queries don't make sense. I can admit I don't have much
> knowledge of the details and I am trying pick up stuff as I go along.
>
> Thanks in advance.
>
> Best Wishes
>
> Sriram
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Hi guys,
I have put my dissertation online, please find it here:
http://bitbucket.org/mg/dissertation/downloads/
I'll add a link to the VIFF documentation next.
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. Perhaps one of the windows-savvy people on this list can help you
more or at least look at the errors.
> All the best for your thesis. I suspect your thesis will be centred
> around VIFF and MPC and I will be glad to take a look after you have
> submitted. Will you link to it from th
everything together if possible.
Which platform are you on? I'm running VIFF on Debian unstable with
Python 2.5.4 and Twisted 9.0 (these are the system packages).
You are certainly right that the initial installation is daunting when
done manually. We could make it easier by bundling things, b
FakeFieldElement
class has the interface of a FieldElement but does no computations.
A new --fake flag for benchmark.py enables these elements.
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"Håvard Vegge" writes:
> atl...@stud.ntnu.no wrote:
>> Siterer Martin Geisler :
>>
>>> Atle and Håvard: do you have your thesis' online somewhere? I would
>>> like to include links to them. I have your thesis' in PDF format
>>> al
Martin Geisler writes:
> Everybody: if someone wants to describe the Nordic Sugar auction then
> that would be super, otherwise I'll do it. Marcel has promissed to
> write something about the distributed RSA.
Sorry, he has written a bit about distributed AES!
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then please put it in now :-)
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Nigel Smart writes:
> Whats you complete PYTHONPATH?
>
> Maybe I am not picking up something
It's just the one ~/opt/lib/python directory.
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Martin Geisler
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.
/me mutters something about security can be in the real-world...
Well, my advice to you is to make sure you have everything laid out
nicely in the PYTHONPATH. Then try importing VIFF code in an interactive
Python session -- you can see which code to import from the benchmark.py
script, for exam
mpz(1234567891234567891234567)
>>>> len(str(x**12345))
> 297410
>>>>
Okay, so some things are working... I'm afraid I don't know why you get
the import errors you reported in the other mails.
If you can give me SSH access to the machine, then I can take a clo
g installed which my
> path does not pick up I either have to
> a) Search around to find it on the system
> or
> b) Install it myself in my own space
> Clearly b usually takes less time ;-)
Heh, yeah.
> Also no-one in the dept seems to use python for anything, so I doubt
&
set = set
except NameError:
from sets import Set as set
which simply tests to see if "set" is defined, otherwise it imports it
From the sets module, which defines a Set class in old Python versions.
Which Python version are you using (python -V)? Which distribution is
this?
the standard library paths such as /usr/lib.
That's where I find a lot of libgmp.* files.
> Nigel
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_
home/projects/crypto/Linux/lib/python/viff/config.py", line 33, in ?
> from viff.prss import generate_subsets, PRF
> File "/home/projects/crypto/Linux/lib/python/viff/prss.py", line 47, in ?
> from gmpy import numdigits
> ImportError: No module named gmpy
Yes, you
ke Zope
> interfaces or Twisted.
Why is the code not put into VIFF? We already have too many
dependencies, to I would much prefer not to add new ones.
Dependencies are especially a problem on Windows, unless they come with
ready-made installers with the compiled C extensions.
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nerate_keys(self.keysize)
>
>
> def deserializer(paillier_type, str):
> -return tuple(map(long, str))
> +if paillier_type == "viff":
> +return tuple(map(long, str))
> +if paillier_type == "nacl":
> +return str.dic
confused by the code.
> I won't have to time to implement it any time soon. Would you like to
> do it, or should I put it in my backlog?
It's not overly important -- I'll do it when I get sufficiently annoyed
by it :-)
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Hi Janus,
I like it very much that the benchmark can figure out by itself which
program counters are needed for preprocessing.
Can you change it so that it will only run the benchmark once if it sees
that no preprocessing is needed?
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w how to use the framework,
> including SecreC implementations of Apriori and Eclat.
Sounds very impressive :-)
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reports of interest are:
http://bugs.python.org/issue1814
http://bugs.python.org/issue4258
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uld have
~/src/viff:
COPYING
COPYING.LIB
NEWS
README
apps
doc
run.py
setup.py
twisted
viff
The important part is that one can find viff/config.py inside a
directory found in $PYTHONPATH.
> Im using ubuntu 9.04.
Excellent, then you should have it easy.
Sigurd Torkel Meldgaard writes:
> On Mon, Oct 19, 2009 at 2:14 PM, Janus Dam Nielsen
> wrote:
>> I like it.
>> On 19/10/2009, at 13.55, Martin Geisler wrote:
>
> Me too, and it should be documented by a line or two in the developer
> guide-lines, so it can be looke
know if you like it or not and if you think we should
switch to this style from now on.
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the "Stick Figure Guide to
the Advanced Encryption Standard (AES)":
http://www.moserware.com/
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pgpP6kYVErL01.pgp
Description
on slide 9 how one will typically combine SubBytes, ShiftRows,
and MixColumns into one operation operating on diagonals. I don't know
if that will matter for us?
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ll simplify the interface nicely, at least for consumers.
Using simpler types also leads to less memory usage which has a positive
effect on performance, as Marcel notes. So let's go for it.
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mmand line, right? (we have optparse for that)
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Yes, when you return a Deferred, it loses its value. The value is
transferred to the other Deferred.
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sionel to say "we tested with VIFF 0.8"
instead of "we tested with VIFF 50056a810951").
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Hi there,
I just stumbled upon this blog post which explores the connection
between deferreds in Python and monads in Haskell:
http://code.mumak.net/2009/07/twisted-monads.html
It might be interesting for someone here.
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VIFF (Virtual Ideal Functionality Framework) brings
So Deferred._continue is added as a callback to our r Deferred, and
since _continue return None, this becomes the value stored inside r.
I think the take-home message is that you have structured your code in
an unusual way. Whenever you add a callback to a Deferred but keep
referring
Marcel Keller writes:
> Hi Martin,
>
> Martin Geisler wrote:
>> All the tests in the buildbot are currently broken:
>>
>> http://buildbot.viff.dk/waterfall
>>
>> It is because of this change of yours:
>>
>> @@ -164,6 +166,18 @@
>>
l scopes of
the Deferreds by storing a reference to the runtimes "on the side".
The list of Deferreds in self.runtimes ought to be enough -- can you not
add callbacks to that list if you need something to happen when the
runtimes are ready?
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;> about this, but it looks like gather_shares would be better than
>> ShareList since you must have all four shares anyway.
>
> I don't agree with this entirely. gather_shares ignores errors.
Yeah, sort of. It will still pass on the list of results in case of an
error, but som
ss right? Then just create a repository under
~/repos and it will automatically show up in the web interface. Add
metadata in .hg/hgrc like for the other repositories.
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mented correctly, pending an implementation
> of Elliptic Curves.
Maybe you should publish the patches as a tree on hg.viff.dk like Marcel
has done -- and then let me know when you're happy with it and want me
to pull it into the main tree.
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VIFF (Virtual Ideal Functionality
lue as
> argument.
Thanks, pushed as revision c1259ceebc55!
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pgpmv8UmRd5yi.pgp
Descr
ld(0)
> +rho2 = share.field(0)
Due to automagic coercion you can actually initialize the values to 0.
> +for xi, (rhoi1, rhoi2), c in shares:
> +x += xi
> +rho1 += rhoi1
> +rho2 += rhoi2
> +asser
ef secret_share(self, inputters, field, number=None, threshold=None):
> +"""Share the value, number, among all the parties using additive
> shareing.
> +
> +To share an element x in Z_{p}, choose random x_{1}, ..., x_{n-1} in
> Z_{p},
> +de
re):
> +"""A share in the Orlandi runtime.
> +
> +A share in the Orlandi runtime is a 3-tuple (x_{i}, rho_{i}, Cr_{i}) of:
Have you tried running Sphinx on these docstrings? I would wrap the
tuples in ``...`` and drop the curly parenthesis around the subscripts.
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Martin Geisler
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t reactor
>
> If you use other reactors such as Gtk2Reactor or WxReactor, VIFF still
> will work but without any speed improvements.
Very cool! Thank you very much for sticking with your idea and refining
it like this. I'm pushing it now...
--
some time, but not yet. It needs some minor
> adjustments;-)
>
> Well, back to the report writing. Thanks again!
Sounds great, I'll look forward to seeing more.
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/projects/web/documentation/howto/xmlrpc.html
The SimpleXMLRPCServer in Python does not know about Twisted, so they
will not play together.
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h more free-form than, say, Java in
this way -- in Java you must put "static" functions into a class,
whereas you can just put them in a module in Python.
I hope that makes some sense, otherwise please ask again :-)
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prof.print_stats(1)
> reactor.run = new_run
>
> # This will yield a Runtime when all protocols are connected.
> @@ -874,7 +964,38 @@
> print "Will connect to %s" % player
> connect(player.host, player.port)
>
> -retu
icely over the tree of program counters.
The change would require a fair amount of code, and it's anybody's
guess if the added complexity will pay off.
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VIFF (Virtual Ideal Functionality Framework) brings easy and efficient
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ve secret sharing and the
homomorphic Paillier encryption for multiplications.
The code is very simple
http://hg.viff.dk/viff/file/tip/viff/paillier.py
and can be extended with whatever extra methods you need.
Please let us know which protocols/papers you're thinking of
implementing.
--
orLine()
stdio.StandardIO(io)
# Set up VIFF.
parser = OptionParser()
Toft05Runtime.add_options(parser)
options, args = parser.parse_args()
id, players = load_config(args[0])
pre_runtime = create_runtime(id, players, 1, options, Toft05Runtime)
pre_runtime.addCallback(Som
"Atle Mauland" writes:
> Hi all!
>
> Is there any way of getting the value of the Zp-variable as an
> integer? I need to calculate some values mod p...
You can access the modulus attribute:
>>> from viff.field import GF
>>> Zp = GF(131)
>>>
Python. It is only if the threads do things
>> blocking for I/O that you will see a performance increase by using
>> multiple threads.
>
> I'm aware that Python only runs on one CPU, a friend pointed that out
> to me today. However, the Twisted thread mentioned above would
t with an integer, so
if check == 0
should work just fine.
> return False
> return True
>
> results = gather_shares([temp_open])
> test_results = results.addCallback(check_result)
> return test_results
Like above you can
llback. The reason is that you cannot wait on a
value in VIFF, you always have to tell VIFF what it should do when the
value arrives at some point in the future.
> My goal is to keep most of the code oblivious as to if it is computing
> with shares or field elements. This greatly simplifies the
swer)
> return callback_result
> else:
> print "No value, False"
> return False
>
> def print_answer(self, value):
> print "Result ", value
I think you want to call self.runtime.shutdown() here
Abstract). CRYPTO 1997: 425-439
It might be possible to implement this protocol directly in VIFF,
instead of building things from scratch.
The paper can be found here:
http://www.springerlink.com/content/bq1jxkcuygj287cy/
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ur illusion that "x * y" is just like a normal
multiplication begins to break down.
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obal
Interpreter Lock (GIL):
http://www.artima.com/weblogs/viewpost.jsp?thread=214235
http://www.python.org/doc/faq/library/#can-t-we-get-rid-of-the-global-interpreter-lock
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n callbacks
> ||
> stringReceived()mul() / open() etc.
>||
> queue_deferred() myIteration()
> |
>
Martin Geisler writes:
> I'll try and write a mail to them to explain our problem in more
> detail. Maybe your short patch didn't provide enough information when
> taken out of context.
I've included a larger answer from Jean-Paul Calderone below -- you can
read
ner suggested another way but I don't think that
> that way works for us.
Do you mean the inlineCallbacks or the coiterate? And why it not work?
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o let the recursive calls finish in order to let
the local variables and stack frames be garbage collected.
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ent and reactor.doIteration here.
A question springs to my mind: calling
reactor.runUntilCurrent()
reactor.doIteration(0)
is the same as calling
reactor.iterate(0)
and the documentation for that method says:
[...] This method is not re-entrant: you must not call it recursively;
in particul
f.pbar.set_fraction(self.shares / float(n))
return value
a.addCallback(step)
b.addCallback(step)
c.addCallback(step)
The idea is to make the callback update the progress bar, but otherwise
pass the value through unharmed.
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s).
Did the timings behave better when you started doing more AES
operations in parallel?
As we discussed at a meeting here at DAIMI, I usually run 1000
multiplications in parallel in order to minimize the impact of the
network latency on each multiplication.
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Martin Geisler writes:
> If you would like to add stuff to the page, then you can always find
> the latest version here:
>
> http://hg.viff.dk/viff/raw-file/tip/doc/todo.txt
>
> People with commit access are of course encouraged to edit the file
> directly :-)
Let me just
o.txt
The current revision hash is 24ba1dae612d (revision 1103).
People with commit access are of course encouraged to edit the file
directly :-)
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e):
http://viff.dk/doc/passive.html#viff.passive.PassiveRuntime.prss_share_random
> I talked to my supervisor, Tord, and we are wondering if there is any
> bit-decomposition function implemented?
Not directly, but maybe as part of the comparison protocols -- Tomas?
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st the other day, so maybe he
can contribute more to the pseudo-code :-)
There were a slightly tricky issue with the synchronization of program
counters that we had to think about, but now I don't remember the
details. But I know that Tomas has a photo of our blackboard... :-)
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r MPC. It sounds better when you pronounce it.
I agree, I also mostly skip the "S" since who wants to hear about
insecure multiparty computation anyway? :-)
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at a native English speaker had
complained to him about the hyphen (not on the homepage, but in a
paper by Ivan). So now I'm writing "multiparty" instead.
I still insist on using "MP" as an abbreviation, just like you would
abbreviate "database" as "DB" a
Martin Geisler writes:
> Håvard Vegge writes:
>
>> Hi!
>>
>> In the following code line the variable ra1 from node 1, 2 and 3 is
>> assigned to r1, r2 and r3, respectively.
>> r1, r2, r3 = runtime.shamir_share([1, 2, 3], Zp, self.ra1)
>>
>> Is it
hat P2 and P3
still participate. So the full code would look like this:
if runtime.id == 1:
r1 = runtime.shamir_share([1], Zp, self.ra1)
else:
r1 = runtime.shamir_share([1], Zp)
This way all players get their share, but it is only P1 who provides
any input.
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ra)When you delete messages because no new deferred elements
> need them then you can get situations in big programs that an
> element is deleted, but it is suddenly needed far from where it was
> first created.
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/enum.py:193: undefined name 'EnumValueCompareError'
viffbench/test/test.py:52: undefined name 'Suite'
in addition to some warnings.
I hope you like the changes, and that they mostly work! :-)
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hey require a proper release before they will accept software into
their catalog.
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f you could add some documentation to the viff.aes
module and link it to the other documentation. At the moment it is
only the lin_comb function that made it into the doc.
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The program uses n (or maybe n+1) Share so this indicates that a
single Share costs about 2 KiB when used in multiplications like this.
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this blog post:
http://blog.mekk.waw.pl/archives/14-Twisted-inlineCallbacks-and-deferredGenerator.html
So... more food for thoughts :-)
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think it would be difficult to make
such an installer -- please see and comment on the discussion here:
http://tracker.viff.dk/issue14
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Hi guys,
Take a look at this: we're in the top 10% of all Python projects:
https://www.ohloh.net/p/viff/factoids/1178198
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n to be called when the next piece of data is
ready. It is particularly important that the code does not hold on to
the CPU for too long -- this stops the reactor.
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but it is wasteful with memory unless the
programmer takes special care not to start too much at the same time.
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compile
out-of-the-box.
Homepage:
http://code.google.com/p/shedskin/
I wonder how it compares to something like Cython.
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fit from it :-)
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s should not be integers in the
> set form 0 to p-1, but integers from -(p-1)/2 to +(p-1)/2. How
> should one do that efficiently?
That should be as simple as
x.value - (x.modulus - 1) // 2
--
Martin Geisler
VIFF (Virtual Ideal Functionality Framework) brings easy and efficient
SMPC (Se
will
> later put it on viff.dk. If you have problems getting it to work, I'll
> like to hear about that, too.
Please consider putting the code somewhere public where we can better
collaborate on it. If you put it on bitbucket you would get a bug
tracker, a wiki and nice Mercurial hostin
ine and Python 2.4 at the university.
> I see that eGenix.com have a version of pyOpenSSL that supports Python
> 2.6. Is this compatible with VIFF and all the other packages? Guess
> I'll just have to try...
I have never tried any of their packages, so I don't know.
--
Martin Geis
"Sigurd Torkel Meldgaard" writes:
> I just saw this on reddit - we might like to look into some of the
> mentioned tools:
>
> http://www.reddit.com/r/programming/comments/7lute/ask_proggit_what_is_the_best_simulator_for_p2p/
Excellent, thanks for the link!
--
Martin
Martin Geisler writes:
Hi
> I suggest that we aim for a release after the weekend, on the 22nd.
> Does people think this is a good idea?
It's been a week since I asked and nobody has replied, neither
positively or negatively. So the release is put on hold for now.
To those wh
ure this out for yourself.
Let me know what you think -- if nobody thinks anything, then we'll
just delay the release.
--
Martin Geisler
___
viff-devel mailing list (http://viff.dk/)
viff-devel@viff.dk
http://lists.viff.dk/listinfo.cgi/viff-devel-viff.dk
urpriced :-) Can you not just explain
your mail client that this is a mailing list?
Of course, if many replies wander off-list because of this, then we
can change the setting.
--
Martin Geisler
VIFF (Virtual Ideal Functionality Framework) brings easy and efficient
SMPC (Secure Multiparty Computa
eno(function)
> 366 20.9230.057 26.6800.073 selectreactor.py:93(doSelect)
> 173360/866802.5240.0009.8540.000 defer.py:314(_runCallbacks)
Hmm... apart from spending much more time in doSelect than in my
trace, then I don't see any big difference. Too bad, I thou
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