Update README.md

KEINOS · Aug 12, 2024 · ca50c0b · ca50c0b
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Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/README.md b/README.md
@@ -131,7 +131,8 @@ rawKey := key.Secret.Bytes()
 This package supports [ECDH](https://en.wikipedia.org/wiki/Elliptic-curve_Diffie%E2%80%93Hellman) key agreement protocol for the TOTP secret key generation (deriving TOTP secret from ECDH [shared secret](https://en.wikipedia.org/wiki/Shared_secret)).
 
 ```go
-// Pre-agreement between Alice and Bob.
+// Pre-agreement between Alice and Bob. commonCtx can be any string but consistent
+// between Alice and Bob.
 commonCurve := ecdh.X25519()
 commonCtx := "example.com [email protected] [email protected] TOTP secret v1"