User-mediator monitoring and controlling access to electronic content

A method of a user-mediator mediating (monitoring and controlling) access to an electronic content, comprising:

• receiving, by a mediator computing device of the user-mediator, a second share SKG2 from an owner server of an owner, wherein a first share SKG1 is provided to a member server of a member of a group by the owner;
• wherein the group is created by the owner server generating a group public key PKG and a group secret key SKG;
• wherein the member is added by owner server to the group by generating the first share SKG1 from the group secret key SKG and a public key of the member, and the second share SKG2 from the group secret key SKG and a public key of the user-mediator;
• wherein a supplicant publishes an electronic content for the group, comprising the supplicant encrypting the electronic content to the group public key PKG, wherein the electronic content includes a header and a payload;
• and
• wherein the member obtains the encrypted electronic content;
• further comprising;
• the user-mediator receiving a request, by the member, for mediation, comprising the user-mediator receiving a dispatch of the header of the encrypted electronic content from the member;
• determining, by the user-mediator, whether the member is eligible to decrypt the electronic content, if eligible, the user-mediator responding to the request for mediation with a member accessible header, wherein the member accessible header includes the header after application of SKG2;
• wherein the member obtains a secret based on SKG1 and the member accessible header;
• and
• wherein the member decrypts the payload of the electronic content using the secret.