Jungwoo Ryoo

Even as text-message two-factor authentication is just starting to become common, a newer method, a return to the era of the physical key, is nipping at its heels.

Black Friday kicks off the end-of-year shopping whirlwind. How does your credit card issuer watch out for fraudulent purchases on your account amid all those…

Design patterns encourage programming efficiency and code reuse. This course is a look at traditional design patterns as applied to Python. Jungwoo Ryoo covers 15 essential creational, structural, and behavioral patterns to help you solve common coding challenges, while introducing best practices that will keep your solutions consistent, complete, and correct.

Topics include:
1. Understanding design patterns
2. Best design practices: consistency, completeness, and correctness
3.… Show more

Design patterns encourage programming efficiency and code reuse. This course is a look at traditional design patterns as applied to Python. Jungwoo Ryoo covers 15 essential creational, structural, and behavioral patterns to help you solve common coding challenges, while introducing best practices that will keep your solutions consistent, complete, and correct.

Topics include:
1. Understanding design patterns
2. Best design practices: consistency, completeness, and correctness
3. Working with creational patterns
4. Working with structural patterns
5. Working with behavioral patterns Show less

I teach network security at Penn State, and this Lynda opportunity was great for me to capture the essence of what I teach to my undergraduate students. The following is the official Lynda course description!

Network protection is vital to organizations big and small, but it doesn't have to be an expensive proposition. Learn how to protect your network with open-source tools, and do it completely FREE. Jungwoo Ryoo shows how to set up firewalls, investigate network traffic with a packet… Show more

I teach network security at Penn State, and this Lynda opportunity was great for me to capture the essence of what I teach to my undergraduate students. The following is the official Lynda course description!

Network protection is vital to organizations big and small, but it doesn't have to be an expensive proposition. Learn how to protect your network with open-source tools, and do it completely FREE. Jungwoo Ryoo shows how to set up firewalls, investigate network traffic with a packet analyzer, detect threats and malicious activity with an intrusion-detection system, and enable network logging and monitoring. Start here for a low-cost route to a more secure network.

Topics include:

*Setting up a host firewall
*Setting up a host as a network firewall
*Setting up a DMZ
*Capturing and analyzing packets with Wireshark
*Using Snort to detect network intrusions
*Logging network activity with syslog-ng, Kiwi, and other solutions
*Setting up a simple network management protocol (SNMP)
Show less

An Information Technology (IT) auditor collects information on an organization's information systems, practices, and operations and critically analyzes the information for improvement. One of the primary goals of an IT audit is to determine if the information system and its maintainers are meeting both the legal expectations of protecting customer data and the company standards of achieving financial successes against various security threats. These goals are still relevant to the newly… Show more

An Information Technology (IT) auditor collects information on an organization's information systems, practices, and operations and critically analyzes the information for improvement. One of the primary goals of an IT audit is to determine if the information system and its maintainers are meeting both the legal expectations of protecting customer data and the company standards of achieving financial successes against various security threats. These goals are still relevant to the newly emerging cloud computing model of business, but with a need for customization. We believe that there are clear differences between cloud and traditional IT security auditing, which is validated by our interviews with cloud security auditors. Therefore, this paper explores potential challenges unique to cloud security auditing. The paper also examines additional challenges specific to particular cloud computing domains such as banking, medical, and government sectors. Finally, we present emerging cloud-specific security auditing approaches and provide our critical analysis. Show less

Presentation at SATURN 2014. The results of our case studies indicate that a strategic, system-wide, architectural approach to security, implemented through the partial or full adoption of security frameworks, results in the best outcome.

I am teaching a computer forensics at Penn State. Due to my familiarity with the topic, I had this wonderful opportunity to develop an online introductory course on Computer Forensics in collaboration with lynda.com.

This paper written for the 2010 International Conference on Business, Economics and Information Technology (ICBEIT) examined and discussed the differences between the wired and wireless technologies that, at the time, were available in the United States and South Korea.

Accepted and to be published!