README.md in tpm-key_attestation-0.2.0 vs README.md in tpm-key_attestation-0.3.0

@@ -22,11 +22,22 @@
     $ gem install tpm-key_attestation
 
 ## Usage
 
 ```ruby
-  TPM::SAttest.dererialize(certify_info).valid?(certified_object, certified_extra_data_hash)
-  TPM::EKCertificate.from_der(certificate_der).conformant?
+key_attestation =
+  TPM::KeyAttestation.new(
+    certify_info,
+    signature,
+    certified_object,
+    signing_key,
+    hash_function,
+    quilifying_data
+  )
+
+if key_attestation.valid?
+  key_attestation.key
+end
 ```
 
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.