clef

The difference between alto and tenor clef is that the c is on a different line.

I don't really see how Clef offers any benefit, except that you can't use standard OTP with Clef.

All that a clef needs to do is to indicate (a) where the G is and (b) which octave it is in.

I feel like this is a roman à clef and I'm missing the clef.

The clefs would switch to a different line in the middle of a phrase or just change completely from a c-clef to a g or f clef.

Reading the viola clef is strictly less difficult than reading the transposing clefs used by brass and winds.

That double treble clef is called the super-treble clef and I've only ever seen it in the appendix of a book called the science of sound.

If you learned to play piano in a different notation, Western clef note sheet music would be cryptic.

With typesetting technology it should be mess important to have conductor and accompanist on the same clef.

Someone else mentioned adding another line atop the treble clef and then using the 6-line staff for both clefs.

It would put the low C one below the bass clef and the high C one above the treble clef, instead of two below and two above but only one in between.

The only sheet music I personally can't sight read is for the cello, which uses a different clef.

Oh, and there's already a notation within the standard system for your first proposal: a treble clef with "8vb" written below it.

You're implying that if someone gets hold of the phone/mirrors the storage, they can't get at the clef secret key because of the "pin".

It works though, and today you rarely see someone write "clef" instead of "clé" or "cuiller" instead of "cuillère".

What makes this better than Clef[0], which is a free app and based on a similar rudimentary RSA-signed challenge-response protocol?

FirefoxOS might be the next hot thing, and if people switch to it, they're going to switch away from Clef.

Clef actually doesn't require internet on the secondary device.