Some advertise other indicators of authenticity that are not relevant to academic credentials. Often they must prove their skills through degrees, diplomas, certified credentials, and continuing education. This can be authenticated either through Google credentials, or a sync passphrase. The identity provider is the one that provides the user credentials. Graduates are commissioned as officers with medical doctor credentials. Some of them contain login credentials or site preferences. Sensitive user data remains encrypted using credentials. PMI later introduced many other credentials and a certification. Security clearances are among the most carefully guarded credentials. One website utilizing badges for alternative credentials is Badges for Vets. Some of these credentials have been questioned. RNs may earn additional credentials or degrees. Davis was the first choice because of his strong political and military credentials. The attacker is also able to connect to other networks associated with the users' credentials. The BA mechanism provides no confidentiality protection for the transmitted credentials.