private PersistenceManager()
{
this._encryptedKeys = new HashSet<string>
{
SettingsConstants.AccessKeyField,
SettingsConstants.SecretKeyField,
SettingsConstants.SecretKeyRepository,
SettingsConstants.SecretKeyRepository,
SettingsConstants.EC2InstanceUserName,
SettingsConstants.EC2InstancePassword,
SettingsConstants.ProxyUsernameEncrypted,
SettingsConstants.ProxyPasswordEncrypted,
SettingsConstants.UserIdentityField,
SettingsConstants.RoleSession
};
}