A B
Before implementing Shield Platform Encryption for Social Security numbers at Northern Trail Outfitters, an Integration Architect should prioritize the following two considerations:
- review Shield Platform Encryption configurations and
- encrypt data using the most current key.

Explanation:
Review Shield Platform Encryption configurations:
This step involves ensuring that the encryption settings are properly configured for Social Security numbers, including which fields should be encrypted and the appropriate encryption key usage.

Encrypt data using the most current key:
Shield Platform Encryption uses keys to encrypt data. It's crucial to use the most current key to maintain the highest level of security. This might involve rotating keys regularly as recommended by Salesforce.

Why other options are incorrect:

Encrypt all the data so that it is secure:
While encrypting all sensitive data is a good practice, it's not strictly necessary in this case. The business requirement specifically mentions Social Security numbers, so the focus should be on securing that particular data type.

Use Shield Platform Encryption as a user authentication or authorization tool:
Shield Platform Encryption is designed for data encryption, not user authentication or authorization. Authentication and authorization typically involve other security measures like passwords or access tokens.

Inform users about how it affects their business solution:
While informing users is important after implementation, it should not be considered a priority step before the actual configuration and encryption. Users need to be aware of the impact on their workflows, but this should come after Shield Platform Encryption is set up...

A, B are correct.

Response A: Link to SF https://developer.salesforce.com/docs/atlas.en-us.securityImplGuide.meta/securityImplGuide/security_pe_best_practices.htm

"When you generate a new tenant secret, any new data is encrypted using this key. However, existing sensitive data remains encrypted using previous keys. In this situation, Salesforce strongly recommends re-encrypting these fields using the latest key."