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PROFESSIONAL-CLOUD-ARCHITECT · Question #86
You are designing a mobile chat application. You want to ensure people cannot spoof chat messages, by providing a message were sent by a specific user. What should you do?
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Submitted by salim_om· Mar 30, 2026Designing for security and compliance
Question
You are designing a mobile chat application. You want to ensure people cannot spoof chat messages, by providing a message were sent by a specific user. What should you do?
Options
- ATag messages client side with the originating user identifier and the destination user.
- BEncrypt the message client side using block-based encryption with a shared key.
- CUse public key infrastructure (PKI) to encrypt the message client side using the originating user's
- DUse a trusted certificate authority to enable SSL connectivity between the client application and
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Topics
#PKI#message authentication#public key encryption#non-repudiation