What is the Signal messaging app and how secure is it?

Tom Gerken

14 April 2025

4 min

PME All levels

BLUF

Signal is an encryption service limited to the sender and receivers. Messages can disappear after a set period of time. Signal is not suitable for highly secure transmissions due to risks with communicating via mobile devices.

READ: What is the Signal messaging app and how secure is it?

References

BBC News: High factual reporting
COLLECTIONS/The Runway (airforce.gov.au)
RAAF RUNWAY: RATIONALE, GUIDELINES, LEARNING OUTCOMES, ETC.

What is the Signal messaging app and how secure is it?

BLUF

References

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What is the Signal messaging app and how secure is it?