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What are these codes? Transfer ID is a random tracking number created just for this transfer. It keeps your message and any uploaded files linked together as one package. Channel fingerprint is a SHA-256 hash — a math function that turns the details of this transfer into a fixed-length code. Change even one character of the input and the code comes out completely different, so it works like a tamper seal. The note at the bottom means your files are scrambled while stored (AES-256) and while they travel over the internet (TLS).
Transfer ID 71ba6574-b165-4313-a621-04639b935d2b
Channel fingerprint 202937e23fdd10d9 174aec9cc7d3d54a cef74fad1318d875 c1781d54f5eeec44

AES-256 encryption at rest · TLS in transit · SHA-256 integrity fingerprint

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U.S. Patent 10,891,294.