Which of the following represents a true statement regarding software and hardware encryption? Select three.

a$.$ The trusted execution environment is a very secure software model.

b$.$ Hardware encryption cannot be exploited like software encryption.

c$.$ SEDs require successful authentication before access is granted.

d$.$ TEE protects the confidentiality and integrity of its code and data.

E$.$ HSM is a software$-$based encryption engine with extremely secure keys.