Hi All:
I am hosting a Sage server for our department and ever since upgrading to
6.X the following message displays every time Sage is launched.
Executing twistd --pidfile="sage_notebook.sagenb/sagenb.pid" -ny
"sage_notebook.sagenb/twistedconf.tac"
/home/sageserver/sage-6.2/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)
.
.
.
I've been tracking this down and noticed there are a number of posts on the
web related to this warning although not specifically addressing Sage.
Unfortunately, some sites have provided various workarounds but I cannot
seem to find a resolution.
I am currently hosting Sage 6.2 on Ubuntu Server 12.04 and tried an
experimental build using Ubuntu 14.04. Initially, I installed GMP 6.0.0a
from gmplib.org and rebuilding Python using the command *sage -f python*
along with *SAGE_UPDATING=yes make*. The warning persisted. Then I did a
complete build from source adding libgmp-dev to the standard pool of
prerequisite packages. Still no luck.
First of all, is this a problem with Sage or the OS I've selected to use?
Is there a package that is missing that should be included in the build?
Any input would be welcome. Thank you!
Have a GREAT DAY!!
Shaun
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