title: In iOS8 can access to the keychain be limited only by auth by fingerprint
body: <p>I need to securely store/retrieve items on iOS keychain.  </p>
  
  <p>From Apple KeyChainServicesReference doc (<a href="https://developer.apple.com/library/ios/documentation/security/Reference/keychainservices/Reference/reference.html" rel="nofollow">https://developer.apple.com/library/ios/documentation/security/Reference/keychainservices/Reference/reference.html</a>) I retrieve keychain items using  SecItemCopyMatching call. The latter pops up a system prompt for authenticating against local keychain that allows using fingerprint or, alternatively, a 4-digit phone passcode. </p>
  
  <p>While I consider auth with fingerprint secure, it's that 4 digit PIN option that downgrades my current security. So, my question is: is there a way to query keychain with just fingerprint option (no passcode option and if fingerprint auth fails, it just fails, no fallbacks to 4 digit passcode)</p>
  
  <p>I have looked into LocalAuthentication and although the latter provides the exact flow that I need, LA doesn't give me access to the keychain and thus LA is of no use to me</p>
  
  <p>Thanks a lot in advance </p>