Final answer:
The incorrect safeguard for a brokerage to use for protecting personal information is the public disclosure of client information. Safeguards like encryption, data audits, and access controls are critical in maintaining data security.
Step-by-step explanation:
The safeguard that a brokerage should not use to protect personal information is public disclosure of client information. Safeguards such as encryption, regular data audits, and access controls are essential for protecting sensitive data.
Encryption converts data into a code to prevent unauthorized access. Data audits involve a regular review of data to ensure accuracy and that it has not been compromised. Access controls restrict the level of access to data based on user roles.
Public disclosure of client information, on the other hand, would be a violation of privacy laws and regulations and would undermine the trust between clients and the brokerage firm. Brokerages are required to keep client information confidential unless specifically authorized by the client or as required by law.