0P3N Blog

Cybrary’s Open Blog is a user contributed cybersecurity knowledge base that brings together content highlighting the latest tools, exploits, technologies and insights in the industry.

Harassment in IT: Are things any better 40 years later?
By: rcubed
March 7, 2017

Several high-profile sexual harassment cases in recent years serve as a reminder how far the tech industry has yet to advance with regard to the fair treatment of women in the workplace. Truth be told, it’s a pervasive problem in our culture that extends well beyond the IT field, however, the problem is particularly acute in IT due to ...

Critical Services' Vehicles Tracker Project: Fundamentals
By: Jawady Muhammad Habib
March 7, 2017

It has been a long period of time since I posted on 0P3N; however, "better late than never" as they say.So, here's another project concept that was taken from my projects' catalog which I want to share with you:  The Critical Services' Vehicles Real-time Tracker project or the CSVRT ...This document provides a deeper look into the project, digging more under the ...

Symmetric and Asymmetric Key Encryption: Forming a Mental Model
By: abrockwa
March 7, 2017

Symmetric and Asymmetric Key Encryption: Forming a Mental Model When being introduced to cryptography , an admittedly daunting subject, it’s best to start at the most common subjects first at a very high level and then go deeper once that view is understood; the nitty-gritty of the mathematics behind the crypto can wait. ...

The Art of First Impressions: How to Stand Out at a Career Fair and Land the Job
By: Olivia
March 6, 2017

For many students, the approaching of spring means one thing: A rush to attend every career fair and hiring event possible to land that job or internship post-graduation. For professionals, the attendance of career fairs may come on more of an ‘as needed’ basis. Still, it is important to remember the following tips to make your best first impression ...

Tutorial: TFTP using Python
By: Shubham Rathi
March 6, 2017

In this post, I'm going to share a short script which can be used to create you own TFTP server. You need to run the server.py on your server (it can be your local machine) and client.py on your client machine (i.e. your local machine). While both scripts are running, you can look at your server's files and download them. CODE: ...

Security Plus - Compliance and Operational Security
By: ram
March 6, 2017

Compliance and Operational Security 2.1 Based on CompTIA’s list of Security + exam objectives (their PDF list of domains is found here: https://certification.comptia.org/docs/default-source/exam-objectives/comptia-security-sy0-401.pdf   ), this article covers the second domain, Compliance and Operational Security 2.0, with its first sub-heading (2.1). ...

IPTables Firewall Rule Generator
By: Tamas Szucs
March 5, 2017

Operation of the firewall rule generator The base of the firewall rules are the logged traffic. Application of the firewall rule generator Setting the traffic logging: iptables -A INPUT -j LOGiptables -A OUTPUT -j LOGiptables -A FORWARD -j LOG Start the required communications, and wait to accumulate ...

Dharma Ransomware Virus: The .wallet Extension
By: David Balaban
March 5, 2017

In late 2016, threat actors behind the CrySiS ransomware decided to give up their campaign for some reason. They made the master decryption keys public so that everybody infected could get their data back. It seemed at that point that the group of crooks gave up the nasty extortion business. However, this anticipation never materialized. ...

Flex-Learning: Exploring the growing world of online learning
By: Rachel Laura M
March 4, 2017

Not so long ago, when you wanted to pursue any kind of educational experience, you had to enroll in a course, pay your tuition and then commit to a specific time and place for a certain amount of time (e.g., a quarter, semester or academic year) to complete the experience. However, in today’s modern and technology-centered times, there are ...

UNM4SK3D: AWS, Cloudbleed, and CloudPets
By: Olivia
March 3, 2017

#outage The annoyance when your Internet won't load is quite possibly the most irritating feeling of the 21st century. So when the Amazon S3 outage occurred on Tuesday, February 28th for almost 5 hours, both consumers and businesses alike were in quite a mood. S3, or Simple Storage Service, provides hosting ...