In this scenario, the part of the CIA triad that has been broken is Integrity.
Integrity refers to the accuracy and trustworthiness of data. If Alice is able to change the price of a book without proper authorization, it indicates that the integrity of the price data has been compromised. The system should have safeguards in place to prevent unauthorized modifications to data, and in this case, that protection has failed.
Confidentiality pertains to protecting information from unauthorized access, and availability refers to ensuring that information is accessible to authorized users when needed. Neither of those is specifically violated in this scenario, as the focus is on the unauthorized alteration of data.
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