Most video conferencing platforms aren't truly encrypted. Learn what end-to-end encrypted video conferencing means for enterprises and why Wire is different.
Most enterprise video conferencing platforms claim to be encrypted. The problem is that encryption can mean very different things depending on how a platform is built.
For organizations discussing sensitive business, legal, financial, or operational information over video calls, a secure video conferencing platform is crucial. But many platforms advertise security while still retaining the ability to access call content through their infrastructure.
True end-to-end encrypted video conferencing removes that risk by ensuring that no party outside the call, including the platform provider, can access your call's content.
This guide explains what encrypted video conferencing actually means, why many platforms fall short of enterprise security requirements, and how to evaluate providers that can genuinely protect sensitive communications. We'll also compare popular video conferencing tools and examine how Wire approaches security with end-to-end encryption by default.
To know more about how Wire provides default end-to-end encryption, book a demo.
Encrypted video conferencing uses cryptographic protocols to protect the audio, video, and shared content of a video call from unauthorized access. Ideally, even the platform provider shouldn't be able to access your call content.
There are two ways video call platforms can be encrypted:
It's crucial to understand what kind of encryption your provider offers because most standard platforms like Zoom, Teams, Google Meet only provide transport encryption.
Even if they do provide E2EE, tools may restrict certain features when E2EE is enabled. Depending on the provider, capabilities such as in-meeting chat, cloud recording, live transcription, or integrations may become unavailable.
This creates a trade-off between security and functionality. Teams may choose to disable E2EE to access the features they need, resulting in inconsistent security across the organization.
A stronger approach is to build E2EE into the platform's architecture from the start, allowing organizations to maintain security without requiring users to sacrifice core collaboration features.
We'll discuss more about what you should look for in a truly secure video conferencing tool, but first, let's understand why transport encryption may not be enough for your organization.
Transport encryption (TLS and DTLS-SRTP) only protects data in transit across the network. It is insufficient for enterprise security because it does not eliminate provider access, protect metadata, or address several other risks that matter in regulated environments.
Transport encryption only protects communications while they move between a participant's device and the provider's servers. Once the encrypted stream reaches the provider's servers, it is decrypted, processed, and redistributed to meeting participants. At that point, the provider has technical access to the call content.
That means anyone with access to the server infrastructure may be able to access the call content, including:
Transport encryption is built on an architecture where encryption keys are not exclusively controlled by the people participating in the conversation.
This is actually one of the core reasons why most business communication is still unencrypted.
For organizations operating in highly regulated sectors, including government, defense, financial services, healthcare, and legal services, that level of exposure may not align with security or compliance requirements such as GDPR, NIS2, and DORA. In these industries, the communication must be protected even from the service provider itself.
Metadata introduces another layer of risk in transport encryption. Many platforms can still collect information about:
For security-sensitive organizations, intelligence agencies, law enforcement, and executive leadership, these patterns can reveal operational information even when call content remains protected.
Optional end-to-end encryption creates a separate challenge.
When users have to manually activate E2EE, security becomes dependent on individual behavior. One missed setting during a board meeting or crisis response call can create an unnecessary exposure. For example, MS Teams offers E2EE only on 1:1 calls, and even then both participants have to manually turn it on.
But since we know that many video call platforms are encrypted, the important question becomes: Who holds the decryption keys? This should be the basis when you're evaluating encrypted video conferencing software. Read on to know other questions to keep in mind to make the right choice.
When evaluating an encrypted video conferencing platform, look beyond marketing claims and assess how encryption is implemented, how keys are managed, and whether communications remain protected across meetings, messaging, and file sharing.
The most important requirement is that it provides E2EE video conferencing by default to avoid unencrypted communication completely.
Ask vendors:
Many platforms offer E2EE as an optional setting that users must manually activate.
Others limit E2EE to one-to-one calls and revert to server-side encryption for larger meetings or when participant counts exceed a certain limit. This is partly because securing large-group calls is significantly more complex, especially when collaboration features such as in-meeting chat, reactions, hand-raising, and screen sharing must also remain end-to-end encrypted.
MLS (Messaging Layer Security) is an Internet Engineering Task Force (IETF) standard cryptographic protocol that addresses the scalability problem in E2EE group calls. It uses efficient tree-based key structures to distribute encryption keys across multiple participants without degrading security or requiring individual key exchanges between every pair.
When evaluating vendors, ask a simple question: What protocol powers your group call encryption?
A provider should be able to clearly explain whether it uses MLS, another E2EE protocol, or a server-side encryption model. The strongest choice is of course MLS.
Wire co-founded MLS with the IETF and is the first enterprise collaboration platform to secure all communication (including group calls and conferencing) with MLS. This approach provides consistent end-to-end encryption across messaging, file sharing, voice, and video while maintaining the scalability enterprises require.
Learn more about Wire's security architecture.
Local key management is a foundational requirement for genuine end-to-end encrypted video conferencing.
Encryption keys should be generated on participant devices and never be transmitted to the platform provider.
When comparing encrypted video conferencing platforms, ask:
If a provider stores or controls decryption keys, it may still access call content.
A better approach is a zero-knowledge architecture, where participants control the encryption keys and the platform provider can't decrypt call content, even under subpoena or in the event of a server compromise.
Organizations in defense, intelligence, and critical infrastructure recognize that devices, accounts, or credentials could eventually be compromised.
To find an encrypted conferencing platform that is genuinely enterprise-ready, consider how communications remain protected after a compromise occurs, not just how breaches are prevented. It should offer fallback communication channels and should provide:
Wire's implementation of MLS provides post-compromise security through continuous key rotation: even if an attacker gains access to a device at a given moment, they can't decrypt past sessions or future ones after the key updates.
Similarly, Wire's ID Shield integrates with existing Identity Providers (IdPs) to automate device verification and revocation, so that when an account is compromised, IT teams can contain the compromise without a manual, error-prone process.
Also read: Why Crisis Communication Needs End-to-End Encryption
For government agencies, defense organizations, critical infrastructure operators, and highly regulated enterprises, deployment flexibility is often a non-negotiable requirement.
These organizations often can't rely exclusively on multi-tenant public cloud environments because of regulatory obligations, data sovereignty requirements, operational security policies, or classified workloads.
They need the ability to deploy collaboration infrastructure within a private cloud, dedicated environment, or fully isolated network.
Wire supports deployment across public cloud, private cloud, on-premises, and air-gapped environments, enabling organizations to align secure communications with their operational and regulatory requirements.
Learn more about Wire's security deployment options.
Single Sign-On (SSO) and System for Cross-domain Identity Management (SCIM) help organizations automatically grant and remove conferencing access when employees join or leave.
Without these controls, organizations may leave former employees with access to sensitive communications or create unmanaged accounts that fall outside established security policies.
When you're evaluating encrypted video conferencing platforms, ask:
Organizations operating under GDPR, NIS2, and DORA, as well as healthcare organizations evaluating HIPAA-compliant video conferencing platforms, should assess more than encryption alone. They should also evaluate how providers handle key management, identity controls, auditability, access to communication data, and the protection of sensitive information throughout its lifecycle.
Many enterprise conferencing platforms advertise encryption, but the level of protection varies significantly depending on how encryption is implemented.
Is it built into the platform's architecture (enabled by default, consistently applied across all meeting types, and inaccessible to the provider), or is it an optional feature that depends on administrative settings and provider-managed encryption keys?
The table below compares leading encrypted video conferencing tools and how secure they truly are.
| Feature | Wire | Zoom | MS Teams | Google Meet |
|---|---|---|---|---|
| E2EE by default (all features) | ✅ | ⚠️ Opt-in | ⚠️ Opt-in, limited | ❌ |
| MLS protocol | ✅ | ❌ | ❌ | ❌ |
| E2EE group calls (100+ participants) | ✅ | ⚠️ Limited | ❌ | ❌ |
| Zero Trust Architecture | ✅ | ❌ | ⚠️ Partial | ❌ |
| Local encryption key storage | ✅ | ❌ | ❌ | ❌ |
| Post-compromise security | ✅ | ❌ | ❌ | ❌ |
| Open source / auditable | ✅ | ❌ | ❌ | ❌ |
| On-prem / sovereign deployment | ✅ | ⚠️ Limited | ⚠️ Limited | ❌ |
| E2EE file sharing | ✅ | ❌ | ❌ | ❌ |
| Secure federation | ✅ | ❌ | ⚠️ Limited | ❌ |
| Approved for classified comms by the German government | ✅ Wire Bund | ❌ | ❌ | ❌ |
Legend:
✅ Supported by default
⚠️ Supported with limitations, configuration, or opt-in requirement
❌ Not supported
As you can gather from the table, many mainstream video call platforms provide E2EE, but it's often optional, limited to specific meeting types, or dependent on provider-controlled infrastructure. For example, MS Teams provides E2EE on 1:1 calls and only when both participants enable it manually.
None of the platforms provide E2EE across group calls fully, usually because securely managing encryption keys as participants join, leave, and interact in real time is significantly more complex than securing 1:1 conversations.
It's also important to compare who holds the encryption keys. Because if a provider stores or controls it, they may still be able to access meeting content.
The same principle applies to sovereign deployment and post-compromise security. Sovereign deployment gives organizations greater control over where sensitive communications are processed and stored, which is often essential for government agencies and regulated industries. Whereas post-compromise security limits the impact of a breached device or account by preventing attackers from using that access to decrypt historical or future communications.
For a more detailed comparison, check out:
But apart from these features, you should also consider the ease of use of the video call platform.
If employees find a platform difficult to use, they may revert to consumer messaging apps, personal email accounts, or other unauthorized tools that create new security and compliance risks.
Wire combines enterprise-grade security with a familiar messaging, calling, conferencing, and file-sharing experience that employees can use without extensive training.
Organizations can standardize on a single secure collaboration platform instead of asking teams to switch between separate tools for collaboration and video conferencing.
Ready to replace opt-in encryption with always-on E2EE? Book a demo to see how Wire combines enterprise-grade security with a user experience people actually adopt.
Encrypted video conferencing is essential for organizations that handle sensitive information related to privacy, regulatory compliance, financial performance, legal matters, or business continuity.
Here are a few use cases where default E2EE video call apps help the most.
Government agencies, defense organizations, and national security teams routinely discuss classified initiatives, policy decisions, operational planning, and inter-agency coordination over video.
In these environments, communications often contain information that could have significant consequences if exposed. Secure video conferencing for government that offers E2EE, metadata protection, and sovereign deployment options helps ensure sensitive discussions remain under organizational control and protect internal communication.
Wire Bund is approved by Germany's Federal Office for Information Security (BSI) for VS-NfD classification, the German government's equivalent to NATO Confidential, making it one of the very few video conferencing platforms validated for government use in classified environments.
When an organization's primary communication infrastructure is affected by a ransomware attack, a breach, or a network compromise, the last tool a response team wants to rely on is the one that may itself be compromised or inaccessible.
An encrypted, out-of-band conferencing channel that's deployed separately from the main environment, with no dependency on the organization's standard IT stack becomes useful here.
Wire is designed to help with crisis communication, and its E2EE-by-default model means the channel remains trustworthy even in adversarial conditions.
Meetings that involve highly sensitive information, like mergers and acquisitions, legal strategy discussions, board meetings, and executive communications, require stronger protections than standard video conferencing can provide.
For these conversations, confidentiality obligations may extend beyond document handling to the communications infrastructure itself. Attorney-client privilege, regulatory obligations, and fiduciary duties may require organizations to ensure that the meeting content remains inaccessible to service providers and other third parties.
In field operations, protecting communications goes beyond secure video conferencing.
Metadata such as who is communicating, when conversations occur, how frequently teams interact, and where participants are located can reveal valuable information about personnel movements, command structures, and ongoing activities.
An effective encrypted video conferencing tool protects both communications and the metadata that could be used to infer sensitive details.
For example, Wire's Metadata Mask feature obscures network traffic so that communications appear as ordinary web traffic, a capability with direct relevance for intelligence operations, law enforcement in hostile environments, and defense contractors subject to surveillance risk.
But this is just one of the many use cases and reasons why organizations choose Wire as their encrypted video conferencing tool. Read on to see what else Wire offers.
Wire combines secure messaging, voice, video conferencing, and team collaboration in a single platform, enabling encrypted group conferencing for up to hundreds of participants. Teams can meet, message, share files, and collaborate in real time with E2EE enabled by default across every interaction.
Here's what makes Wire different from all the other encrypted video conferencing platforms:
More than 1,800 companies across government, defense, financial services, healthcare, critical infrastructure, and global enterprise environments choose Wire as their encrypted video conferencing platform.
If your organization also requires encrypted video conferencing where only participants can access communications, request a demo and see how Wire secures every call by default.
Encrypted video conferencing is a form of video calling in which the audio, video, and shared content of a meeting are protected by cryptographic encryption. In its most secure form, only the call participants can decrypt the content. The platform provider, server infrastructure, and any third parties can't access the call, even if they intercept the data stream.
Zoom offers E2EE as an opt-in setting for eligible meeting types, but it is not applied by default. When E2EE is enabled in Zoom, features including cloud recording, live transcription, and certain integrations are disabled. For enterprises that require consistent, policy-enforced E2EE across all calls, an opt-in model creates compliance and governance gaps, since enforcement depends on individual users enabling the setting before each meeting.
Microsoft Teams supports end-to-end encryption only for one-to-one calls and only when both participants enable it manually. Group meetings, conference calls, channel communications, and recorded sessions use server-side encryption rather than E2EE. This means Microsoft infrastructure can process call content as part of the service architecture.
MLS (Messaging Layer Security) is an IETF-standardized cryptographic protocol that enables scalable end-to-end encryption for group communications, including video calls. Unlike earlier approaches that struggle with key management across large groups, MLS uses efficient tree-based key structures to maintain E2EE at scale while providing post-compromise security. Wire co-founded MLS and is the first enterprise platform to apply it across all communication types, including group conferencing for hundreds of participants.
The most secure enterprise video conferencing platform is one that applies E2EE by default across all call types (not just 1:1 calls), uses a transparent and independently auditable encryption protocol such as MLS, stores keys locally on participant devices rather than on vendor servers, and supports sovereign deployment including on-premises hosting. Wire meets all of these criteria. The major mainstream platforms, including Zoom, Microsoft Teams, and Google Meet, do not meet the full set of security requirements.
Yes. E2EE video call apps protect the call content but do not inherently protect metadata (who called whom, when, for how long, and from which network). For high-sensitivity environments including intelligence operations, defense, and field operations, these patterns can expose operationally significant information even when call content is fully protected. Wire's Metadata Mask feature obscures network traffic patterns so that communication activity is not visible to external observers.
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