We're saying goodbye to global restrictions based on SCP and CCP (announcements)

submitted ago by Atko

SCP and CCP no longer play any role in your ability do submit links/start discussions or vote. You can now downvote as soon as you create an account. Please note that you can only vote once from a single IP address (voting IP addresses are stored encrypted and we have no way to reverse this encryption). We are still tweaking this so please report if you notice anything unusual about voting.

Edit: The biggest reason for this change is that I noticed how multiple subverses had "please upvote me" threads where their members were able to gain 300+ CCP in matter of minutes. At the same time, regular users would need weeks or even months to reach this level. That essentially broke the old system and we need something new. Perhaps requiring new accounts to create 100 comments in 100 different subs before being able to vote 100 times? If you have an idea, please feel free to share it, I'm all ears.

Edit 2: Here is an example of the problem I am trying to tackle:

  • a large corporation which has hundreds or thousands of employees, comes over to Voat and pushes their advertising links to the frontpage because upvotes are not restricted for new accounts as much as downvotes
  • at the same time, majority of Voat users today does not have the ability to downvote or has restricted downvotes

Edit 3: This is now reverted to the way it was. I need to think this through.

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TheSoaringShite ago

no way to reverse this encryption.

How long does it take to iterate the lot? @Atko

CptCmdrAwesome ago

About 0.6 seconds for a class B on a single core using standard Python, for me. So if I haven't miscalculated or otherwise screwed up, about 10 hours for the whole IPv4 range.

import hashlib
from base64 import b64encode
def undotIPv4 (dotted):
    return sum (int (octet) << ( (3 - i) << 3) for i, octet in enumerate (dotted.split ('.') ) )
def dotIPv4 (addr):
    return '.'.join (str (addr >> off & 0xff) for off in (24, 16, 8, 0) )
def rangeIPv4 (start, stop):
    for addr in range (undotIPv4 (start), undotIPv4 (stop) ):
        yield dotIPv4 (addr)
count = 0
for x in rangeIPv4 ('1.1.0.0', '1.1.255.255'):
    count += 1
    print b64encode(hashlib.sha512(x).digest())
print "Total IPs hashed: " + str(count)

time python voathash.py > /dev/null

real 0m0.607s user 0m0.505s sys 0m0.047s

TheSoaringShite ago

I got under four hours, but I just hashed the numbers 0 to 222 in superior perl. (I think you got a good chunk of start-up time there)

I also posted it on /v/voatdev: https://voat.co/v/voatdev/comments/413694

CptCmdrAwesome ago

Yeah I'd agree with what you say about the startup time, plus I was on a VM. FYI from what I can tell, the Voat code does hash a string rather than a number.

Not sure I agree with the use of a certain word in your comment though. I suppose I could have written it in Perl, but I wanted other people to be able to read it, and I didn't want my screen to look like I sneezed on it ;P

Cheers :)