The Stealth Encrypt 2.0 Bluetooth Encrypted Earbuds

Hardware-Based Secure Voice Communications

The Stealth Encrypt 2.0 provides hardware-based voice encryption in the familiar form of Bluetooth earbuds, enabling secure communications over existing cellular networks and compatible VoIP services without requiring a proprietary calling app, dedicated server or specialist carrier service.

For everyday use, Encrypt 2.0 functions as a conventional Bluetooth headset. When a sensitive conversation is required between compatible Stealth users, secure calling can be activated directly from the earbuds. Digital calls use AES-256 voice encryption with automatic ECDH session-key negotiation, providing end-to-end protection independently of the underlying communications network.

Designed for government, law enforcement, security professionals and organisations handling sensitive information, Encrypt 2.0 provides an additional communications security layer while retaining familiar mobile calling workflows.

Secure Communications Without Dedicated Infrastructure

Unlike secure communications solutions that require users to communicate through a dedicated application or service, Encrypt 2.0 performs voice encryption within the headset itself.

During a digitally encrypted call, speech is processed and encrypted by the transmitting device before being carried through the communications channel. The receiving Encrypt 2.0 device decrypts the signal and restores the original speech. Existing cellular or compatible VoIP services can therefore provide the communications channel without requiring dedicated secure telecommunications infrastructure.

Key Features

• AES-256 digital voice encryption
• ECDH automatic session-key negotiation
• New negotiated key for each digitally encrypted call
• Hardware-based voice processing within the earbuds
• No proprietary secure-calling app required
• No manufacturer cloud or encryption server required
• Digital encrypted and analogue secure voice modes
• Adaptive switching according to connection conditions
• Compatible with cellular voice and supported VoIP services
• Encrypted voice-message capability
• Encrypted recording with compatible applications
• Conventional Bluetooth-earbud functionality
• Bluetooth 5.2
• Dual-microphone noise reduction
• Simple touch-control activation of secure calling

How It Works

Encrypt 2.0 pairs with a smartphone over Bluetooth and can be used as a conventional wireless headset for everyday calls and audio.

When two compatible Stealth users need to secure a conversation, encryption can be initiated directly from the earbuds during an established call. In adaptive mode, the devices prioritise AES-256 digital encryption, automatically negotiating a new session key for each encrypted call using ECDH.

Encrypted voice is converted into a modulated audio signal using AMSI technology, allowing the protected communication to travel through compatible conventional voice channels. At the receiving end, the other Encrypt 2.0 device demodulates and decrypts the signal, restoring the original speech for the recipient.

Where connection conditions do not support reliable digital encrypted communication, Encrypt 2.0 can automatically switch to its more widely compatible analogue voice-scrambling mode. Analogue mode can also be selected manually and uses a user-configurable shared key between compatible devices.

Compatibility & Applications

Encrypt 2.0 supports secure communication across cellular voice networks and compatible internet-based voice services, allowing organisations to use existing communications infrastructure rather than deploying a dedicated secure calling platform.

Digital encrypted calling can be used with compatible VoIP services including FaceTime, WhatsApp and Telegram, alongside supported cellular voice services including VoLTE and VoNR.

Encrypt 2.0 also supports encrypted voice messaging and encrypted audio recording with compatible applications. This extends protection beyond live conversations to voice messages and recorded audio where the required Bluetooth audio functions are supported.

Compatibility can vary between applications and devices, particularly where voice services apply noise reduction or other audio processing to the encrypted signal.

Technical Specifications

• Product: The Stealth Encrypt 2.0
• Device type: Bluetooth encrypted earbuds
• Bluetooth: 5.2
• Secure voice modes: Digital encryption and analogue voice scrambling
• Digital encryption: AES-256
• Call key negotiation: ECDH
• Digital session keys: Automatically negotiated for each encrypted call
• Analogue / voice-message key: User-configurable shared key
• Secure call setup time: ≤5 seconds
• Noise reduction: Dual microphone
• Cellular communications: GSM, UMTS, VoLTE and VoNR
• Compatible VoIP examples: FaceTime, WhatsApp and Telegram
• Encrypted voice messaging: Supported with compatible applications
• Encrypted recording: Supported with compatible applications
• Secure call operating time: Up to 2 hours
• Standard operation: Conventional Bluetooth headset functionality

Compatibility Information

Secure communication requires compatible Stealth encryption equipment at both ends of the conversation.

Digital encrypted-call performance and compatibility can vary according to the smartphone, network conditions, voice codec and calling application. Some applications use noise reduction or audio processing that can interfere with transmission of the digitally encrypted audio signal.

For specific deployment requirements or device and application compatibility, please contact BLD.