Block chain proof of work

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Creating a blockchain with Javascript (Blockchain, part 1):





Implementing Proof-of-Work in Javascript (Blockchain, part 2)




Miner rewards & transactions - Blockchain in Javascript (part 3)




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SIPVicious using kali linux

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SIPVicious February 18, 2014 Sniffing/Spoofing SIPVicious Package Description SIPVicious suite is a set of tools that can be used to audit SIP based VoIP systems. It currently consists of four tools:. svmap – this is a sip scanner. Lists SIP devices found on an IP range svwar – identifies active extensions on a PBX svcrack – an online password cracker for SIP PBX svreport – manages sessions and exports reports to various formats svcrash – attempts to stop unauthorized svwar and svcrack scans. Source: https://code.google.com/p/sipvicious/ SIPVicious Homepage  |  Kali SIPVicious Repo Author: Sandro Gauci License: GPLv2 Tools included in the sipvicious package svcrack – Online password cracker for SIP PBX root@kali:~# svcrack -h Usage: svcrack -u username [options] target examples: svcrack -u100 -d dictionary.txt 10.0.0.1 svcrack -u100 -r1-9999 -z4 10.0.0.1 Options:   --version             show program's ver...
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Acoustic Attack Against HDDs Can Cause Permanent Damage CCTV DVR, PCs, ATMs Hard disks play a vital role in numerous computing systems including, personal computers, closed-circuit television (CCTV) systems, medical bedside monitors, and automated teller machines (ATMs). Security researchers from Purdue University show that an attacker can use acoustic sound to cause significant vibrations in HDDs internal components.They show even if a small displacement in the head leads to malfunction with HDD operation and can cause permanent damage. HDD Acoustic Attack An HDD consists of two components the platters and the read-write heads. The data will be stored in platters and the read/write operations performed by heads. If the attacker can create the acoustic signals nearer to victim device in audible frequencies by using an external speaker or any other device may result in remote software exploitation which allows an attacker to deceive the user to play a malicious sound attach...
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Three Major Categories of Telecom Fraud

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A Guide to Detecting and Preventing Telecom Fraud According to the Federal Trade Commission, telecom fraud continues to account for more and more fraud complaints each year. The numbers continue to grow and new technology has led to an onslaught of new telecom fraud tactics. The latest schemes are difficult to track and investigate because of their frequency, their layers of anonymity, and their global nature. This guide will help you learn about the different types of telecom fraud and industry best practices for detection and prevention. Three Major Categories of Telecom Fraud We will divide the many telecom fraud schemes into three broad categories, based on who the fraudsters are targeting. These categories are: Schemes to Defraud Telecom Service Providers These schemes are the most complicated, and exploit telecom service providers using stimulated traffic, SIP trunking, regulatory loopholes, and more. Schemes to Defraud Subscribers This is simply any scheme that...
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