"Shed?" Don't mean to insult anyone, but aren't there dozens of words that infer far more security than "shed?" Even words that wouldn't violate any licensing or copyright? It kinda sounds the opposite of high tech / security, not something that instills confidence.
Kinda sounds like a redneck saying, "I'm gonna lock you up in th' wood shed, boy."
Other than going in a direction that doesn't draw on 'True' or 'Crypt' at all, general theme(s) of something new / updated and / or something inferring 'strong' or 'secure' could be used.
CryptoMax (Crypto is a universally used term / word)
UberSafe (or UberVault).
I could easily come up with 25 that instill more confidence & "professionalism" than 'shed' (that would not violate (realistic) naming rights.
In business, just because a company's name includes a very common word (say, "Hut") doesn't mean no other company can ever use a very common, dictionary word - in any shape, form or fashion.
Yeah, years ago Radio Shack sued Auto Shack (now Auto Zone) over name infringement. Those were 2 giants, though.
But how many companies have "hut" in their names? (a lot).
How many contain something about "hobby?" But Hobby Lobby doesn't sue them all (probably couldn't).