Secure files
The file system includes support for secure files with the following properties:
- Created via the ATFS XPUT command or in MicroPython using a mode of * with the open() method.
- Unable to download via the ATFS GET command or MicroPython's open() method.
- SHA256 hash of file contents available from ATFS HASH command (to compare with a local copy of a file).
- Encrypted on the SPI flash.
- MicroPython can execute code in secure files.
- Sockets can use secure files when creating TLS connections.
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