Downloading diagnosis keys

A regularly scheduled job is triggered to download files with batch of Temporary Exposure Keys (TEK) of positively diagnosed, called Diagnosis Keys files. Each of the batch file has unique timestamp. The timestamp that identifying when a certain Diagnosis Keys file was created is used to select only not yet analyzed files for download.

Steps:

• The application gets list of available Diagnosis Keys files from CDN
• Only files with the timestamp older than the latest successfully provided to analyze batch are selected for download
• Files are downloaded over HTTPS protocol to internal device storage

After the above steps Diagnosis Keys files are ready to provide it for exposure checking process.