1 files changed, 3 insertions, 10 deletions

diff --git a/PROTOCOL.u2f b/PROTOCOL.u2f
index eabbd7279..375d73bbc 100644
--- a/PROTOCOL.u2f
+++ b/PROTOCOL.u2f
@@ -150,15 +150,8 @@ SSH U2F signatures
 ------------------
 
 In addition to the message to be signed, the U2F signature operation
-requires a few additional parameters:
-
-        byte            control bits (e.g. "user presence required" flag)
-        byte[32]        SHA256(message)
-        byte[32]        SHA256(application)
-        byte            key_handle length
-        byte[]          key_handle
-
-This signature is signed over a blob that consists of:
+requires the key handle and a few additional parameters. The signature
+is signed over a blob that consists of:
 
         byte[32]        SHA256(application)
         byte            flags (including "user present", extensions present)
@@ -170,7 +163,7 @@ The signature returned from U2F hardware takes the following format:
 
         byte            flags (including "user present")
         uint32          counter
-        byte[32]        ecdsa_signature (in X9.62 format).
+        byte[]          ecdsa_signature (in X9.62 format).
 
 For use in the SSH protocol, we wish to avoid server-side parsing of ASN.1
 format data in the pre-authentication attack surface. Therefore, the