Minor but significant nit: that each of the recipients can open.
The reason it's significant: there are encryption protocols which require some subset m < n, but generally m > 1, such that a quorum of members must assemble or cooperate to read a message. If m = n, then you indeed have a situation where all the recipients must cooperate (that is: all are present or contribute their keys) to read a message.
The reason it's significant: there are encryption protocols which require some subset m < n, but generally m > 1, such that a quorum of members must assemble or cooperate to read a message. If m = n, then you indeed have a situation where all the recipients must cooperate (that is: all are present or contribute their keys) to read a message.