[agar]

Little known fact: in the late '00s, PGP Corp had developed a free standalone "Viewer" to decrypt email if you didn't have the full PGP email product installed (the onboarding process walked you through initial key generation and publication on a keyserver).

The decryption process showed the encrypted PGP Message block and used a similar Sneakers-inspired animation to transform it into your plaintext email. It was incredibly cool and I remain sad that the product never saw the light of day.