Questions and Answers
What is a key requirement for receiving an authentication code via message?
Having mobile coverage to receive SMS
What is a potential risk if a user's mobile phone is lost or stolen?
The user will lose access to their account
What is an attack method that could be used to intercept authentication messages?
Attack on SS7 signaling protocol
What is another type of attack that could be used to gain access to a user's account?
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What is a common use case for authentication using a mobile phone?
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Study Notes
Authentication Using a Mobile Phone
- Authentication code is sent via SMS, a simple authentication approach used for sensitive access, such as banking and government services.
- No additional app installation is required on the phone.
Disadvantages of SMS-based Authentication
- Requires mobile coverage to receive the SMS, which may not always be available.
Risks of SMS-based Authentication
- Loss of access or unauthorized access if the mobile phone is lost or stolen.
- Attackers can gain unauthorized access through SIM swap attacks.
- Attackers can intercept messages using a fake mobile tower or by exploiting the SS7 signaling protocol.
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