On 11 August 2014 13:05, Volker Braun <[email protected]> wrote:
> Pycrypto is not used to implement anything security-relevant. It is safe to
> ignore the warning.

That is reassuring!   It would be nice if we could prevent the warning
appearing at all, as it clearly worries people.

John

>
>
>
>
> On Monday, August 11, 2014 12:50:59 PM UTC+1, Daniel Krenn wrote:
>>
>> Am 2014-02-27 um 01:07 schrieb Andrey Novoseltsev:
>> > When I try to start a notebook from 6.1.1, I get
>> >
>> > sage-6.1.1/local/lib/python2.7/site-packages/Crypto/Util/number.py:57:
>> > PowmInsecureWarning: Not using mpz_powm_sec.  You should rebuild using
>> > libgmp >= 5 to avoid timing attack vulnerability.
>>
>> FYI, still there in 6.3:
>>
>> ┌────────────────────────────────────────────────────────────────────┐
>> │ Sage Version 6.3, Release Date: 2014-08-10                         │
>> │ Type "notebook()" for the browser-based notebook interface.        │
>> │ Type "help()" for help.                                            │
>> └────────────────────────────────────────────────────────────────────┘
>>
>> Please wait while the Sage Notebook server starts...
>> The notebook files are stored in: sage_notebook.sagenb
>> ┌────────────────────────────────────────────────┐
>> │                                                │
>> │ Open your web browser to http://localhost:8080 │
>> │                                                │
>> └────────────────────────────────────────────────┘
>> Executing twistd  --pidfile="sage_notebook.sagenb/sagenb.pid" -ny
>> "sage_notebook.sagenb/twistedconf.tac"
>>
>> /usr/opt/Sage-6.3-amd64/local/lib/python2.7/site-packages/Crypto/Util/number.py:57:
>> PowmInsecureWarning: Not using mpz_powm_sec.  You should rebuild using
>> libgmp >= 5 to avoid timing attack vulnerability.
>>   _warn("Not using mpz_powm_sec.  You should rebuild using libgmp >= 5
>> to avoid timing attack vulnerability.", PowmInsecureWarning)
>> 2014-08-11 13:46:59+0200 [-] Log opened.
>> 2014-08-11 13:46:59+0200 [-] twistd 13.2.0
>> (/usr/opt/Sage-6.3-amd64/local/bin/python 2.7.8) starting up.
>> 2014-08-11 13:46:59+0200 [-] reactor class:
>> twisted.internet.epollreactor.EPollReactor.
>> 2014-08-11 13:46:59+0200 [-] QuietSite starting on 8080
>> 2014-08-11 13:46:59+0200 [-] Starting factory <__builtin__.QuietSite
>> instance at 0x7f3ca6380638>
>>
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