Fwd: Questions about the new "hamagen" application

---------- הודעה שהועברה ---------
מאת: Adi Shamir <adi.shamir@weizmann.ac.il>
תאריך: יום ב׳, 23 במרץ 2020 ב-11:58
נושא: Questions about the new "hamagen" application
אל: mdepartment@wisdom.weizmann.ac.il <department@wisdom.weizmann.ac.il>


Hi,

I received multiple questions about the security and privacy aspects of the
new ministry of health application. The bottom line is that I highly
recommend it. There are several possible architectures one can use for such
a proximity tracing application, and the choice made by its designers
closely follows the one I recommended in an email I circulated to
policymakers about two weeks ago: no location information is uploaded from
the user's phone to any centralized governmental database, and all the
computations are carried out in a fully distributed way on the user's
phone, so that the privacy loss for non-patients is almost nonexistent. In
addition, use of this app is completely voluntary, the proximity detection
makes use of short range bluetooth transmissions, and the code is open
source so anyone can check exactly how it operates. A good summary of why
security experts are comfortable with this app can be found in:

https://www.haaretz.co.il/captain/software/1.8700078

Best personal wishes, and be safe,
Adi.
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