
Standard (AES). The confidentiality and integrity of the user’s files depend
on the secrecy of the symmetric key used to encrypt and decrypt the files.
The public portion of the RSA key pair can be used to encrypt the sym-
metric key that was used to encrypt the user files. The corresponding pri-
vate portion of the RSA key pair is used to decrypt the symmetric key,
which is needed to decrypt the user files. During the trusted boot process,
if the hash values of the current system measurements do not match the
hash values of the initial system configuration, the private RSA keys will not
be decrypted. As a result, the underlying symmetric keys will ...