The encrypted memo field of Zcash could lend itself to some interesting use-cases outside of transaction processing. https://electriccoin.co/blog/encrypted-mem

The encrypted memo field of Zcash could lend itself to some interesting use-cases outside of transaction processing. https://electriccoin.co/blog/encrypted-memo-field/ https://electriccoin.co/blog/encrypted-memo-field/ It looks like this capability is being expanded with in-band secret distribution: https://zips.z.cash/protocol/canopy.pdf https://zips.z.cash/protocol/canopy.pdf