What's public key number of node on Geth 1 command line?

[rchatsiri]

What's mean group of the string as the example below[1]?

QfeDAys9MPDs2XHExtc84jKGHxZg/aj52DTh0vtA3Xc=

Refer from Geth 1 command line dialogue.

private.set(65535, {privateFor ["QfeDAys9MPDs2XHExtc84jKGHxZg/aj52DTh0vtA3Xc="]})

I think is mean public key on /qdata/keys/tm.pub file. Its public key of received transaction node at Geth node number 2

[1] https://github.com/ConsenSys/quorum-docker-Nnodes