16. One or more non-transitory computer-readable media having computer-executable instructions stored thereon that, when executed, cause at least one computing device to: transmit to a group of users, a first document including a data item field, the group of users including a first portion of users including a first plurality of users and a second portion of users including a second plurality of users different from the first plurality of users; receive, from a first user of the group of users, first user input accessing the first document; provide to the first user of the group of users, access to the first document and the data item field, the data item field including a first data item, wherein the first data item is a first numerical item that is visible in the first document; receive, from a second user of the group of users, second user input accessing the first document; provide to the second user of the group of users, access to the first document and the data item field, the data item field including a second data item different from the first data item, wherein the second data item is a second numerical item that is visible in the first document, wherein alternating users accessing the first document and the data item field access data items in the data item field alternating between the first data item and the second data item, and wherein users accessing the first document with the first data item in the data item field form the first plurality of users forming the first portion of the group of users and users accessing the first document with the second data item in the data item field form the second plurality of users forming the second portion of the group of users; receive data identifying a disclosure, the disclosure including one of the first data item and the second data item; responsive to receiving data identifying disclosure of the first data item, identifying users of the first plurality of users as a potential source of the disclosure; and responsive to receiving data identifying disclosure of the second data item, identifying the users of the plurality group of users as a potential source of the disclosure.
17. The one or more non-transitory computer-readable media of claim 16 , wherein the first portion and the second portion are an entirety of the group of users.