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鈥淶oom bombing鈥�

The popularity of Zoom has made it the target of an unprecedented wave of hack attacks, which have received prominent press coverage. The most serious of these has been the phenomenon known as 鈥淶oom bombing鈥�, where hackers will enter meetings and disrupt them by doing anything from hurling abuse to showing porn videos on their screens. You may well have seen a large number of press reports advising against Zoom, stating that it is anywhere from insecure to dangerous to have on your machine.

Security: perspective, proportion and prospect

Being a victim of Zoom bombing must be incredibly distressing. The possibility of it happening during a church service or meeting feels very threatening. The threat, however, is far less imminent than the publicity suggests. As with all potential threats to using the Internet, our responses and actions need to be informed and proportionate.

There are 4 things we need always to remember about online security when we read articles such as those circulating about Zoom at the moment:

1.聽Most of these articles are written to gain attention. The typical article is likely to be sensationalised.

2.聽There is a massive difference between 鈥減ossibility鈥� and 鈥渓ikelihood鈥�. Think of it in terms of using medication. The manufacturers are legally obliged to include a leaflet warning you of all the possible side effects you might experience using the tablets. Most of us take the tablets none the less 鈥� because we know that the likelihood of experiencing an adverse reaction is almost nil. We need to read these articles in the same way. Is it possible that your Zoom service could be Zoom bombed?聽Yes! How likely is it? You are one of 200 million account holders: it is probably 99.999% the case that this will never, ever happen.

3.聽No online platform can ever be 100% safe. There is always some risk. We need therefore to take some steps to guard against the most likely risks; these need to be effective and proportionate 鈥� using what I call the Curtain Solution. The Curtain Solution works like this: we want to ensure that people cannot peer at will into our houses. We therefore hang curtains, which we can draw when we need to, but which are otherwise open to let the light in. We don鈥檛 imagine that this is foolproof: we accept that curtains will not prevent the most determined spy from seeing in some of the time, but we don鈥檛 therefore brick up the windows to make the house 100% safe from observation! So we鈥檙e looking for a Curtain Solution to using any online software platform or programme. Zoom is no different.

4.聽Finally, it is worth noting that Zoom is no worse than other platforms generally; it is just way, way more popular. This is why it has been the chief target for hackers. That particular cloud has a silver lining, however. Zoom has halted all development work on the roll out of new features in order to attend to security concerns. It means that we can reasonably expect Zoom to develop the most robust security protocols of any online meeting software.

The Church is therefore encouraging and supporting the use of Zoom, while issuing the guidelines that follow in order to deal with the security issues that have been identified. Churches following these will be taking responsible action that is both effective and proportionate.

Two different types of meeting

Church services and small group meetings (eg an Elders鈥� Meeting or committee meeting) are different types of meetings and need to be managed accordingly. Church services are public, open and accessible to all. The focus of our approach is therefore to take action should an interruption occur, rather than limiting access or adding additional layers of difficulty for worshippers trying to access the service.

So, for example, while best practice in most settings is never to advertise a Zoom meeting ID, and always require attendees to use a password, we do not feel such measures are appropriate for a public church service. This is no different in principle from the way in which we manage the security of our Sunday services in our church buildings. We will look at the security precautions for church services online below.

Group meetings are private, essentially invitation-only events. The approach to security is therefore to ensure that access is limited only to those people who are invited to attend. The security precautions are correspondingly different, as we shall see below.

Zoom security settings

The security settings for a meeting are set by the host and accessed through their Zoom account. To set up the meeting, go to聽聽and login to your account. Click on the 鈥淢y Account鈥� tab (top right of the screen) and then 鈥淪ettings鈥�.

This is where you should set up your default security procedures. You can then make whatever changes you need as part of the process of scheduling a new meeting. Here are the key recommended default security settings:

1) Join before host: disable

2) Use Personal Meeting ID (PMI) disable

One of the options for setting up a Zoom meeting is to use your own personal Zoom ID. This is often the default if you just start an ad hoc meeting. This is, in effect, a perpetual meeting, so it is not advisable to use this room to host an open meeting because once someone has your number, they can join any meeting at any time. Instead, set each meeting up with its own ID number in the 鈥楽chedule鈥� menu, using 鈥榬ecurring event鈥� if necessary.

3) Require a password when scheduling new meetings:聽disable

Meetings can be set up with or without a password. If selected, this is a randomly generated 6 figure number. The password can be changed by you when you set up the meeting. Remember that if you change it to a word (which you can do), it will be harder for people to get in using an ordinary telephone.

You do not want a password for church services (hence the advice to disable this setting); you do want one for private meetings. You can require a password for any meeting that you set up as part of the scheduling process, so disabling this setting does not prevent this.

The pass number only comes into play if someone inputs the meeting ID number manually when joining a meeting (ie an intruder who is trying to enter without an invitation). Remember, though, that any email meeting invitation that you generate includes the password; if anyone outside the distribution list has access to an invitation, the password no longer provides an additional layer of security.

4) Mute participants upon entry: disable

This is not necessary for group meetings. Muting participants on entry is a good way of preventing people entering the service and being abusive. It allows you as host to monitor who can and can鈥檛 communicate.聽However, entering a virtual church service full of people chatting and talking to one another is a very different experience from entering a room where everyone is silent.

Talking and interaction is one of the most important and enjoyable aspects of coming to church on Zoom 鈥� just as it is on an ordinary Sunday service at church. On the principle of dealing with issues that arise, rather than preventing their possibility, the option to mute worshippers on entry should be disabled.

5) File transfer: disable

This prevents saboteurs circulating malicious files and material to other worshippers. You will, however, need to enable it for group meetings where appropriate. Do that during scheduling; disable that feature here in your default settings.

6) Co host: enable

This is a great feature. It enables you to appoint someone as a co-host to help you monitor and manage the service. If you have enabled a Waiting Room, for example, they can admit people while you concentrate on running the service. Similarly, they can remove a troublesome attendee.

7) Screen sharing: Host Only

Use the Host Only option for both selections. This prevents a would-be zoom bomber from using their screen to share inappropriate content. This is not a necessary precaution for a group meeting, and can be changed when scheduling a new meeting.

8) Disable desktop/screen share for users: enable

As above.

9) Whiteboard: disable

Disable this facility by default: it prevents people from writing inappropriate messages on the whiteboard if you are sharing it. You can always override this during a service or meeting if necessary.

10) Allow removed participants to rejoin: disable

If you have had to take the regrettable step of removing a participant, you don鈥檛 want them simply rejoining the meeting!

11) Allow participants to rename themselves: disable

This prevents people out to cause mischief in a crowded service from 鈥渉iding鈥� when reported.

12) Waiting room: your call

This can be activated when the meeting is set up, or once a meeting has been started. It is included on the 鈥楽ecurity鈥� options at the foot of the screen. People only join the meeting when you admit them.

It functions somewhat like a 鈥済reeting elder鈥� at the door of the church, and is useful as a screening process. However, it means that anyone arriving after the service has started or who leaves briefly and then returns has to be admitted before they can enter. If you want to use this facility, appoint someone as a co-host so that you are not distracted from running the service. Or simply disable it. It鈥檚 your call.

Customising meeting settings

And that鈥檚 it! Once you鈥檝e set your default settings, you鈥檙e ready to host church services and different types of group meetings, while feeling content that you have taken the necessary steps to secure your meetings. The default settings will be applied to every meeting you schedule; you can customise them as part of the scheduling process, rather than coming back to your Settings each time.

Future updates

Remember that Zoom is working on ensuring that the software security is as robust as necessary. These guidelines will be updated regularly to reflect developments and changes. You can check the version and date of this document below. Happy Zooming!

Download this guidance

• Using Zoom securely (PDF | 2mb)