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Fix typo in Lecture 2 #3

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2 changes: 1 addition & 1 deletion lectures/lec02.tex
Original file line number Diff line number Diff line change
Expand Up @@ -367,7 +367,7 @@ \subsection{Avoiding phishing: U2F (simplified)}
\section{Biometrics}
Biometrics are physical features like your fingerprints, your face, etc.
They are very convenient to use for authentication, since you will not forget them and cannot easily lose them.
Biometrics most useful when authenticating in person to a device, such as for phone unlock, or
Biometrics are most useful when authenticating in person to a device, such as for phone unlock, or
to grant a person access to a secure vault.
In these settings, the device performing the authentication has a ``trusted input path''
that can provide some assurance that a real human who owns that biometric is on the other end.
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