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Security measures
The G7 system uses the following interfaces and communication protocols:
Transmitter: Bluetooth Low Energy.
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Receiver: Bluetooth Low Energy and USB.
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App: Bluetooth Low Energy to transmitter. TLS to Dexcom data platform using
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cellular data or Wi-Fi.
The G7 System is designed to transmit data between the transmitter and designated
display devices in accordance to the industry standard Bluetooth Low Energy
protocols. It will not accept radio frequency (RF) communications using any other
protocol, including Bluetooth classic communication protocols.
Don't pair your sensor over Bluetooth in public or populated areas. Bluetooth pairing
should be done in a private and safe location to reduce cyber risks such as
eavesdropping.
In addition to the security provided by the Bluetooth Low Energy connection,
communication between the G7 transmitter, G7 receiver, and mobile applications is
protected by additional levels of security and safety mitigations using an encrypted
and proprietary data format. This format embeds various industry standard encryption
protocols and methods to protect data, verify data integrity, and to detect and prevent
data tampering.
You are responsible for securing your display devices. If security is compromised, it
may affect the Dexcom data shown on the display device.
Use these tips to help secure a smart device:
Secure network: Only connect to a trusted/secure network
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Secure smart device: Don't use the G7 app on a jailbroken (Apple) or rooted
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(Android) smart device
App sources: Only install apps from trusted sources, such as Google Play or
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Apple App Store
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Do you have a question about the G7 and is the answer not in the manual?
Questions and answers
Dexcom G7 continues to show readings 50 or 60 points higher than when I stick my finger and use the supplied recorder. Why?
The Dexcom G7 may show readings 50 or 60 points higher than fingerstick measurements due to several reasons:
1. Sensor's First Day: Newly inserted sensors may show larger differences, which usually decrease over the first 24 hours.
2. Pressure on Sensor: If something is pressing on the sensor (e.g., lying on it), it can affect readings. Removing the pressure can help.
3. Rapid Glucose Changes: Blood glucose changes before interstitial fluid glucose, so fast changes can cause differences between meter and sensor readings.
4. Fingerstick Issues: Inaccurate fingerstick readings can occur if hands are not washed properly or test strips are expired or used incorrectly.
These factors can cause temporary differences between Dexcom G7 and fingerstick readings.
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How high does the Dexcom 7 reciever go?