RubenSomsen

Blind Diffie-Hellman Key Exchange (blind ecash)

The goal of this protocol is for Bob to get Alice to perform a Diffie-Hellman key exchange blindly, such that when the unblinded value is returned, Alice recognizes it as her own, but can’t distinguish it from others (i.e. similar to a blind signature).

Alice:
A = a*G
return A

Bob:
Y = hash_to_curve(secret_message)
r = random blinding factor

epixoip

I wasn't first to get the key. Nor was I second, third, or even fourth. I'm probably not even the
10th to get it (ok, looks like I was the 8th.) But I'm happy that I was able to prove to myself
that I too could do it.

First, I have to admit I was a skeptic. Like the handful of other dissenters, I had initially
believed that it would be highly improbable under normal conditions to obtain the private key
through exploiting Heartbleed. So this was my motivation for participating in Cloudflare's
challenge. I had extracted a lot of other things with Heartbleed, but I hadn't actually set out to
extract private keys. So I wanted to see first-hand if it was possible or not.

dnordberg

# Script used to help generate Swagger docs.
import re
import os
import argparse
import urlparse
import simplejson
from collections import defaultdict
from sqlalchemy.ext.declarative.api import DeclarativeMeta
 
 

dsueiro

This is a review of "Quantitative Analysis of the Full Bitcoin Transaction Graph" by Dorit Ron and Adi Shamir.

There are some incorrect details and analyses that warrant attention.

Oct. 31 UPDATE

The authors have introduced several revisions to their paper, available at the same URL as before.

The criticism below may be outdated in part or in full.

knewter

----------------------------
#<ProbablyWorthWatching::Tweet:0x00000004cfbf30 @author="kanzure_", @content="http://www.youtube.com/watch?v=3N0kWzC6jmE&feature=related Lecture - 2 Architecture of Industrial Automation Systems">
title: Lecture - 2 Architecture of Industrial Automation Systems
description: Lecture Series on Industrial Automation and Control by Prof. S. Mukhopadhyay, Department of Electrical Engineering, IIT Kharagpur. For more Courses visit http://nptel.iitm.ac.in
url: http://www.youtube.com/v/3N0kWzC6jmE&feature=youtube_gdata_player
----------

#<ProbablyWorthWatching::Tweet:0x00000004d026a0 @author="kanzure_", @content="http://www.youtube.com/watch?v=PirH8PADDgQ   the ad">
title: Koyaanisqatsi (trailer)
description: Trailer do filme Koyaanisqatsi

markpundsack

## The quick-and-nasty CVE-2013-0156 Heroku inspector!
## Originally brought to you by @elliottkember with changes by @markpundsack @ Heroku
## Download and run using:
## ruby heroku-CVE-2013-0156.rb
 
`heroku list`.split("\n").each do |app|
  app = app.strip
  
  # Some "heroku apps" lines have === formatting for grouping. They're not apps.
  next if app[0..2] == "==="

postmodern

#!/usr/bin/env ruby
#
# Proof-of-Concept exploit for Rails Remote Code Execution (CVE-2013-0156)
#
# ## Advisory
#
#   https://groups.google.com/forum/#!topic/rubyonrails-security/61bkgvnSGTQ/discussion
#
# ## Caveats
#

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

n1k0

var page = new WebPage();
page.open('http://www.google.fr/', function(status) {
    var base64 = page.evaluate(function() {
        function base64ArrayBuffer(arrayBuffer) {
            var base64        = ''
            var encodings     = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
            var bytes         = new Uint8Array(arrayBuffer)
            var byteLength    = bytes.byteLength
            var byteRemainder = byteLength % 3
            var mainLength    = byteLength - byteRemainder

denik

# Class for managing multiple servers or anything with start() and stop() methods

class ServerRack(object):

    def __init__(self, servers):
        self.servers = servers

    def start(self):
        started = []
        try: