Secure Remote Working - Overview

Secure Remote Working	Technical Considerations	Secure Use of Collaboration Tools

What is Remote Working?

Remote Working is when an employee can carry out regular business duties from a remote location that is outside of their employers physical work space, via the internet. With recent events, remote working has become more popular than previously before and will continue to get more popular as technology evolves.

Remote Working Vs. Teleworking

Although similar and most of the times used interchangeably, remote working and teleworking are similar but are not the same. Below are the differences between the two:

Threats and Challenges posed by Remote Working

By connecting via the internet to potentially classified or sensitive applications or data, there are threats to the safety and security of that information.

Security issues may include:

Lack of physical security - devices can be stolen, drives can be copied, or people can shoulder surf.
Unsecured Networks - connecting to networks that are unsecured such as a cafe, hotel or other open public networks are easy targets for exploitation.
Providing Internal Access Externally - servers will be facing the internet therefore increasing the potential risk and vulnerability of being compromised.
Teleconference Hijacking/Zoom - Unauthorized persons gaining access to a conference by joining a public conference, being shared the link or access code.

For more information please see the references section.

Recommended Security Measures

It is important to realize that because remote working uses the internet for connectivity, it may be a target for compromise. That being said, some helpful measures that employees can take to keep information secure are:

Device Considerations

When the option for multi-factor authentication is available, use it!
Avoid open networks located in coffee shops, public facilities, and hotels.
Apply operating system updates when available.
Use your departments VPN for secured connection.
Password Protect any USB, SD Cards and hard drives.
Lock devices when not in use.

Service Considerations

Some general things to consider when using these applications include:

Enabling two-factor authentication.
Post/Send things that you do not mind sharing with the employer and employee's.
Segregate personal applications and work applications.
Use personal devices for personal applications and work devices for work applications
Ensure that teleconferences are set to private, as well as password protected.
Use collaborative tools when working in an UNCLASSIFIED environment.

Privacy and Security of Collaborative Tools

Employees should always use department-sanctioned tools for collaboration with colleagues, starting with Microsoft Teams (at Protected B if your departmental tenancy has been accredited to that level, or unclassified otherwise), then moving to other sanctioned tools such as GCTools or WebEx. If those options aren’t available, then the Policy on Acceptable Network and Device Use does allow usage of public cloud tools such as Slack, Zoom or Google Hangouts for unclassified work only. However, there are some privacy issues that need to be recognized before using these applications. It is important to remember that these applications are never to be used for any sensitive or classified work.

The Canadian Center For Cyber Security (CCCS) has provided guidance and considerations when using public cloud tools for video teleconferencing (VTC).

When choosing a collaborative tool, some things to consider are:

Prioritizing solutions that do not require participants to install a client unless necessary.
Choose a solution that allows you to control how your data is handled. Some platforms may route data outside Canada or store shared data on servers they control.
Ensure all parties using the collaborative software are aware of and comfortable with any data sharing done by the software owner in order to realize a profit. For example, selling data analytics for marketing and advertising purposes.

For a complete list of things to consider visit the CCCS advisory.

Settings and features that can help keep teleconferencing secure are:

Disable guest screen sharing
Require the host to Be present
Secure the conference with a password
Keep your personal meeting ID or invites private

Slack

When using a paid license of the application, a feature is unlocked that allows HR and management personnel to export ALL chats. Not only can group chats be exported but also chats that are between you and a colleague that is sent in a private chat. This feature cannot be enabled in the free license. It is important to note that Slack does store data regardless of the license, including after 10,000 messages in the free version.

Slack also retains data such as links, passwords, usernames and chats, however does have options to customize policies on data retention.

Settings and features that can help make Slack more secure are:

Ask group members to use two-factor authentication (2FA)
Manage the ability to install apps and connect tools to a group workspace
Limit who has access to the workspace
Use caution when opening links especially if unsolicited
Limit administrative functions

For a more in-depth information on how to use Slack securely, visit the Slack Help Center

Zoom

Zoom has a feature that tracks attention to the webcam in order to see who is actively in the video chat. If a presenter is sharing their screen and a user minimizes the window or leaves their device, a notification will be sent to the meeting hosts. It should be noted that Zoom does not record activity on the device nor does it capture video with this setting.

When a meeting is created, Zoom generates a seemingly random ID that is 9 to 11 digits long. For someone with computing resources, this can easily be cracked allowing malicious actors to join the call.

For more information on how to create a Zoom conference, please see the guide in the references section or click here.

To learn more about best practices and accessibility features please visit ESDC's Accessibility Best Practices for Using Zoom for Meetings and Classes

Google Hangouts

Google hangouts does indeed require a Google account. It is best to use a work account if possible, to avoid details being linked together exposing private interests, and personal activity online when using that Google account. Details such as names, phone numbers, usernames and other information can be pieced together which can be exposed as a single entity in order to exploit other personal information and interests.

Google stores images that have been sent through hangouts to a public url, meaning anyone can technically see the image provided they have the correct url.

Another issue with Hangouts is that it does not feature "end-to-end" encryption. In simple terms, it is only encrypted when it is being sent. This opens the door for eavesdropping on chats as well as Google having visibility on messages.