Patent ID: 7590866

Claim:
A computer-implemented method for surer-distribution of digital content from a first end-user of the digital content to a second end-user of the digital content, the method comprising: receiving encrypted digital content from a first user of the encrypted digital content, by a second end-user of encrypted digital content, the first end-user of the encrypted digital content having previously purchased rights to use the encrypted digital content and being different from the second end-user of the encrypted digital content, wherein the encrypted digital content includes usage conditions specifying one or more predetermined conditions of use for the encrypted digital content by the first end-user and the second end-user, wherein the usage conditions include store usage conditions provided by an electronic store that received the encrypted digital content from a provider of the encrypted digital content, wherein the store usage conditions include at least one of provider usage condition that has been narrowed by the electronic store without invalidating the provider usage condition; and receiving authorization from an authorization authority, by the second end-user of the encrypted digital content, for decrypting the encrypted digital content received from the first end-user of the encrypted digital content without requiring the second end-user to have purchased rights to use the encrypted digital content, wherein the authorization authority permits the second end-user of the encrypted digital content to decrypt and use at least part of the encrypted digital content independent of the rights to use the encrypted digital content purchased by the first end-user of the encrypted digital content.