To “show” the credential to some Resource, the user simply needs to hand over the pair (SN, signature). Assuming the Resource knows the public key (PK) of the issuer, it can simply verify that (1) the signature is valid on SN, and (2) nobody has every used that value SN in some previous credential “show”.
Final Hurdle hintThe earliest.
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Apple's budget laptop, the MacBook Neo, is here. There has been lots of hype around Apple's cheapest ever MacBook and its price point starting at $599. At that price range, it finally puts Apple's MacBook line into financial reach for many potential users who just couldn't see themselves spending $1,000 or more for a laptop.