python - How to ensure that no one will access my socket? -

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i'm developing project in university need receive data set of arduino, sensor , cuhead v1.0 wifi-shield on other side of campus. need communicate thru sockets transfer data sensor server need ensure no 1 send data thru open socket. on server side, need open socket using python 3 or 2.7. on sensor side, library of cuhead wifi shield lacks important functions create secure connections. possible ensure level of security on server side? suggestions have me?

use stunnel @ both ends, traffic @ both ends goes localhost stunnel encrypts , sends other end


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