Preventing sensitive information from being screen shared with untrusted users

A computing system comprising:

• one or more storage devices configured to store score basis data;
• and
• one or more processors implemented in circuitry, the one or more processors configured to:
• determine that a message-sending computing device has received an indication of user input indicating an intent to send a message to a user of a message-recipient computing device;
• prior to the message being delivered to the message-recipient computing device, calculate, based on the score basis data, a screen sharing risk score (SSRS) that indicates a risk that the message-recipient computing device is currently sharing screen content of a screen of the message-recipient computing device with a screen-recipient computing device associated with an untrusted screen-recipient user;
• determine whether the SSRS indicates that the risk is above a risk threshold;
• and
• based on the SSRS indicating that the risk is above the risk threshold, cause the message-sending computing device to output an alert indicating that the message-recipient computing device is possibly currently sharing the screen content of the message-recipient computing device with the screen-recipient computing device associated with the untrusted screen-recipient user.

A computer-readable storage medium comprising instructions that, when executed, cause processing circuitry of a computing system to:

• determine that a message-sending computing device has received an indication of user input indicating an intent to send a message to a user of a message-recipient computing device;
• prior to the message being delivered to the message-recipient computing device, calculate a screen sharing risk score (SSRS) that indicates a risk that the message-recipient computing device is currently sharing screen content of a screen of the message-recipient computing device with a screen-recipient computing device associated with an untrusted screen-recipient user;
• determine whether the SSRS indicates that the risk is above a risk threshold;
• and
• based on the SSRS indicating that the risk is above the risk threshold, cause the message-sending computing device to output an alert indicating that the message-recipient computing device is possible currently sharing the screen content of the message-recipient computing device with the screen-recipient computing device associated with the untrusted screen-recipient user.