Final answer:
The question incorrectly refers to Biological Safety Cabinet classes in the context of cryptography. For protecting Sensitive but Unclassified materials using encryption, FIPS 140-2 Security Level 1 is typically the minimum standard required. It is crucial to use the appropriate level of encryption to secure the confidentiality and integrity of SBU information.
Step-by-step explanation:
The question seems to be referencing the classes of Biological Safety Cabinets (BSCs), but appears to have mistaken them for types of cryptography. For the proper context of cryptography, we do not use BSC classifications. Instead, we have encryption standards to protect sensitive but unclassified (SBU) material. In the context of information security for SBU material, U.S. government standards suggest using encryption that complies with the Federal Information Processing Standards (FIPS) 140-2 or its successor FIPS 140-3, which describes the requirements for cryptographic modules in terms of security levels. For SBU information, usually, FIPS 140-2 Security Level 1 or its equivalent in newer standards would be the minimum. This level includes basic security requirements and could involve software-based cryptography without the need for physical security mechanisms. It's important to select the appropriate level of cryptography based on the classification and sensitivity of the data to prevent unauthorized disclosure and ensure the confidentiality and integrity of the information.