That's not better. Between two banks block chain adds nothing. Either side could alter it just as easily as they could alter a regular transmission, and more easily than they could for a signed encrypted transmission

You need many nodes to make block chain immutable

You only need a sender and receiver to make signed data packets immutable

[–] neatchee@lemmy.world 1 points 1 day ago* (last edited 1 day ago)

You've misunderstood. They're not using this for inter-bank transfers. They're using it for inter-branch/intra-bank communication. And most major banks - certainly the ones investing in blockchain - have hundreds to thousands of branches.

Not to mention signing+encryption and blockchain are not mutually exclusive. You can have signed and encrypted blocks on a chain