Re: Blog post explaining "What is Interledger?"

After reviewing the current protocol a spot,

executionCondition UInt256 SHA-256 hash digest of the fulfillment that will
execute the transfer of value represented by this packet. Connectors MUST
NOT modify this field. The receiver must be able to fulfill this condition
to receive the money.

maybe "Only the receiver can demonstrate knowledge of the secret,
previously shared with the sender, that allows all stages of the
transaction to complete."

I didn't notice while reading the article that it says anywhere that the
receiver has to somehow share a per-transaction secret with the sender,
before the sender invokes ILP.