/rev/aa2b3941a380
changeset: 1195:aa2b3941a380
user: Martin Geisler <[email protected]>
date: Mon Jul 13 14:17:52 2009 +0200
summary: Faster computation of dot product.
diffstat:
viff/passive.py | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diffs (22 lines):
diff -r 51167e387cc3 -r aa2b3941a380 viff/passive.py
--- a/viff/passive.py Thu Jun 25 08:58:54 2009 +0200
+++ b/viff/passive.py Mon Jul 13 14:17:52 2009 +0200
@@ -19,6 +19,8 @@
"""Passively secure VIFF runtime."""
+import operator
+
from viff import shamir
from viff.runtime import Runtime, increment_pc, Share, ShareList, gather_shares
from viff.prss import prss, prss_lsb, prss_zero, prss_multi
@@ -163,8 +165,7 @@
"Number of coefficients and shares should be equal."
def computation(shares, coefficients):
- summands = [shares[i] * coefficients[i] for i in
range(len(shares))]
- return reduce(lambda x, y: x + y, summands)
+ return sum(map(operator.mul, shares, coefficients))
result = gather_shares(shares)
result.addCallback(computation, coefficients)
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