The best solution would be a wallet for academic credentials that works like the wallets used to hold and transact Bitcoin. An alternative would be to use a paper-based system of pre-creating and sharing keys (and then destroying them). But that requires a higher level of trust in the institution that issues the certificates.
What we learned from designing an academic certificates system on the blockchain
MIT Media Lab
53316
+1 wallets; Given the risks to security and privacy of learner keys, paper is simply not a feasible strategy for anything beyond proof of concept in my opinion.