We have confirmed that there is a server certificate revoke check by OCSP in iOS. We have some question about detail of this process.Q1. There is no request to OCSP Responder from iPhone when My Apps calls SecTrustEvaluate what using policy kSecRevokationOCSPMethod while executing URLSession:didReceiveChallenge on iPhone. Is it because of I got the answer form “the caches” which has been saved in iPhone before ?Q2. If Q1 is Yes , Could you tell me the timing of accessing to OCSP Responder in iOS? (Is it related to the App, or it is automatic updating in iOS?)Q3. If Q1 is Yes, How does it determine the expiration date of its caches? (Is there any information about next Update in the response from OCSP ?)Q4.When the iOS application using the UIWebview performs HTTPS access, In the case of redirect server is revoked ,does application check the OCSP responder whether it has been revoked or notEvaluation Environmnet1)Device Version:9.1（13B143） Carrier:docomo22.1 Model:MKU12J/A2)Networkonly Wifi access (without using SIM)

We are developing the iOS application which supports Universal Links and testing now.In the future, we will gradually update apple-app-site-association file to add paths.Does iOS fetch the apple-app-site-association files when the app is updated (not first install)?[Our investigation using Testflight]Version:iOS 9+Procedure:1. Upload the apple-app-site-association file to our server, and upload our iOS application (v1) to Testflight server(not AppStore).2. Download the iOS application(v1) from the Testflight server. ->iOS fetched apple-app-site-association file and Universal Links worked successfully.3. Upload the “new” apple-app-site-association file added paths to our server. and upload the our iOS application(v2) to TestFlight server.4. Update the iOS application(v2) from the Testflight server. -> iOS did not fetch apple-app-site-association file and Universal Links did not work for new added paths.