The phrase "a separate key" is correct and usable in written English.
It can be used when referring to an additional or distinct key that is not part of a larger set or system.
Example: "To access the secure area, you will need a separate key that is only issued to authorized personnel."
Alternatives: "an individual key" or "a distinct key".
By shifting into that mode (by hitting a separate key, like the pound sign or volume button), users can reduce the number of times they have to look at the screen to confirm what they type.
That has led to a new "two-person rule" for downloading classified data, akin to the two guys who would sit in nuclear silos, each with a separate key needed to launch a missile.
Moreover, it can communicate with other nodes by means of a separate key predistribution scheme.
A separate key predistribution using the same scheme of Section 3 is done for all the supernodes belonging to all the groups. .
For security authentication verification, the input image bonded with an RPM and a separate key phase mask (identical RPM) are fractional Fourier transformed with same orders independently.
For image encryption, an input image bonded with a random phase mask (RPM) and a separate key phase mask (another RPM) are fractional Fourier transformed independently.
To enhance message security in the network initialization phase, instead of using the individual key directly, each sensor node can derive a separate encryption key and a MAC key from the individual key [21].
If the necessary key is not in the collection, a request goes to the separate Key Recovery Service, which tries to obtain it.
Some scientific calculators have a separate on/off key, while others integrate it with the "AC" (all clear) key.
Until they realise they have to purchase a separate Allen key.
Each file in the "User Partition", which is basically everything that isn't part of the operating system, is encrypted with a separate individual key.
