On 18/03/12 06:56, Tjerk Anne Meesters wrote:
> On Sun, Mar 18, 2012 at 8:12 AM, Stas Malyshev wrote:
>> Obvious solution would be to use a salt for the hash, which prevents blind
>> pre-computing of hash collisions. However, due to the fact that PHP hash
>> values can be reused in different proce
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在 2012-3-18,15:05,Tjerk Meesters 写道:
> On 18 Mar, 2012, at 2:32 PM, Xinchen Hui wrote:
>
>>> What if php uses salts for specific hashes only, such as GPC (or all
>>> hashes whose lifetime is limited to the current reuqest), and use a
>>> zero-value salt for all others?
>> de
On 18 Mar, 2012, at 2:32 PM, Xinchen Hui wrote:
>> What if php uses salts for specific hashes only, such as GPC (or all
>> hashes whose lifetime is limited to the current reuqest), and use a
>> zero-value salt for all others?
> definitely no,thinking of pre-calculated hash.
Pre-calculated hash o
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在 2012-3-18,13:57,Tjerk Anne Meesters 写道:
> On Sun, Mar 18, 2012 at 8:12 AM, Stas Malyshev wrote:
>> Obvious solution would be to use a salt for the hash, which prevents blind
>> pre-computing of hash collisions. However, due to the fact that PHP hash
>> values can be reused
On Sun, Mar 18, 2012 at 8:12 AM, Stas Malyshev wrote:
> Obvious solution would be to use a salt for the hash, which prevents blind
> pre-computing of hash collisions. However, due to the fact that PHP hash
> values can be reused in different processes by bytecode caches, implementing
> it properly
Hi!
Anyway I was looking at the hash function in PHP the other week, and was
playing around with some different implementations. DJBX33A is fast,
which I guess is why PHP uses it as it is hit so many times in the
execution.
Some time ago we've checked various implementations of hash functions
On 17/03/12 23:17, Simon Schick wrote:
Hi, All
I just came around that talk a couple of days ago ..
http://www.youtube.com/watch?v=R2Cq3CLI6H8
I don't know much about hash-maps and internal php-stuff at all, but
they say that the fix provided in 5.3.9 (and 5.4.0) is more a
work-around than a fi
Hi!
I don't know much about hash-maps and internal php-stuff at all, but
they say that the fix provided in 5.3.9 (and 5.4.0) is more a
work-around than a fix ...
This is true, it is a workaround in a meaning that the hash stays the
same, but the fix prevents one from using excessive amounts o
Hi, All
I just came around that talk a couple of days ago ..
http://www.youtube.com/watch?v=R2Cq3CLI6H8
I don't know much about hash-maps and internal php-stuff at all, but
they say that the fix provided in 5.3.9 (and 5.4.0) is more a
work-around than a fix ...
Would it be an option to provide a
Hi, All
I just came around that talk a couple of days ago ..
http://www.youtube.com/watch?v=R2Cq3CLI6H8
I don't know much about hash-maps and internal php-stuff at all, but they
say that the fix provided in 5.3.9 (and 5.4.0) is more a work-around than a
fix ...
Would it be an option to provide a
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