osx - How the OS X generate the icon phash? -

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i have tried use wireshark sniff airdrop function in os x, found there element call phash.

txt: phash=uphaxlrunb0icgy2udupw6cv5fi=

when using airdrop, appearance icon user icon if have set it. have tried change icon lot of time , open airdrop , using wireshark capture phash value, because phash value generated os x itself, correct, can use scapy change phash value record , resend it, appear icon on airdrop. think os x have method generate value, want know don't need repeat change icon , capture it.


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