Link please?

I haven't yet seen anything indicating that Gavin used a laptop provided by Mr. Wright to perform the verification of the cryptographic proof.

Andresen says an administrative assistant working with Wright left to buy a computer from a nearby store, and returned with what Andresen describes as a Windows laptop in a “factory-sealed” box. They installed the Bitcoin software Electrum on that machine. For their test, Andresen chose the message “Gavin’s favorite number is eleven.” Wright added his initials, “CSW,” and signed the message on his own computer. Then he put the signed message on a USB stick belonging to Andresen and they transferred it to the new laptop, where Andresen checked the signature.