elaborate on t

shizhMSFT · shizhMSFT · commit d2a339224a1f · 2021-07-30T13:54:46.000+08:00
Signed-off-by: Shiwei Zhang &lt;shizh@microsoft.com&gt;
diff --git a/protocol.md b/protocol.md
@@ -110,7 +110,8 @@ same payload. The resulting signatures are encoded and transmitted, preferably
 using the recommended [JSON envelope](envelope.md).
 
 A `(t, n)`-ENVELOPE is valid if the enclosed signatures pass the verification
-against at least `t` of `n` unique trusted public keys.
+against at least `t` of `n` unique trusted public keys where `t` is
+application-specific.
 
 To verify a `(t, n)`-ENVELOPE:
 
