A computer-implemented method for controlling reproduction of an item represented by a digital asset stored in a trusted computing environment using a reproduction device in an untrusted computing environment, in which a succession of data seg¬ments is transmitted from the trusted computing environment to the untrusted computing environment, the succession of data segments comprising segments of reproduction data, each of which includes at least one instruction for controlling the reproduction device to reproduce a portion of the item, and at least one segment of obfuscation data which has a structure identical the reproduction data but is incapable of controlling the reproduction device to reproduce a portion of the item, the method comprising: a) determining whether the next segment of data in the succession should be a segment of reproduction data or a segment of obfuscation data; b) where the next segment of data should be a segment of reproduction data, selecting and extracting an unprocessed segment of data from the digital asset to form the next segment of data; c) where the next segment of data should be a segment of obfuscation data, providing a segment of obfuscation data to form the next segment of data; d) generating a unique encryption key and encrypting the next segment of data using the unique encryption key; e) transmitting the encrypted next segment of data from the trusted computing environment; f) decrypting the encrypted next segment of data received at the untrusted computing environment; g) attempting to control the reproduction device using the decrypted data segment such that where the next segment of data is reproduction data, the reproduction device reproduces the portion of the item at the untrusted computing environment in accordance with the instructions included with the data segment, and where the next segment of data is obfuscation data, the reproduction device is unresponsive; and h) iterating steps (a) to (g) until the entire digital asset, or a desired portion of it, has been processed.

A computer-implemented method for controlling reproduction of an item represented by a digital asset stored in a trusted computing environment using a reproduction device in an untrusted computing environment, in which a succession of data seg¬ments is transmitted from the trusted computing environment to the untrusted computing environment, the succession of data segments comprising segments of reproduction data, each of which includes at least one instruction for controlling the reproduction device to reproduce a portion of the item, and at least one segment of obfuscation data which has a structure identical the reproduction data but is incapable of controlling the reproduction device to reproduce a portion of the item, the method comprising: a) determining whether the next segment of data in the succession should be a segment of reproduction data or a segment of obfuscation data; b) where the next segment of data should be a segment of reproduction data, selecting and extracting an unprocessed segment of data from the digital asset to form the next segment of data; c) where the next segment of data should be a segment of obfuscation data, providing a segment of obfuscation data to form the next segment of data; d) generating a unique encryption key and encrypting the next segment of data using the unique encryption key; e) transmitting the encrypted next segment of data from the trusted computing environment; f) decrypting the encrypted next segment of data received at the untrusted computing environment; g) attempting to control the reproduction device using the decrypted data segment such that where the next segment of data is reproduction data, the reproduction device reproduces the portion of the item at the untrusted computing environment in accordance with the instructions included with the data segment, and where the next segment of data is obfuscation data, the reproduction device is unresponsive; and h) iterating steps (a) to (g) until the entire digital asset, or a desired portion of it, has been processed.

A computer-implemented method for controlling reproduction of an item represented by a digital asset stored in a trusted computing environment using a reproduction device in an untrusted computing environment, in which a succession of data segments is transmitted from the trusted computing environment to the untrusted computing environment, the succession of data segments comprising segments of reproduction data, each of which includes at least one instruction for controlling the reproduction device to reproduce a portion of the item, and at least one segment of obfuscation data which has a structure identical the reproduction data but is incapable of controlling the reproduction device to reproduce a portion of the item, the method comprising: a) determining whether the next segment of data in the succession should be a segment of reproduction data or a segment of obfuscation data; b) where the next segment of data should be a segment of reproduction data, selecting and extracting an unprocessed segment of data from the digital asset to form the next segment of data; c) where the next segment of data should be a segment of obfuscation data, providing a segment of obfuscation data to form the next segment of data; d) generating a unique encryption key and encrypting the next segment of data using the unique encryption key; e) transmitting the encrypted next segment of data from the trusted computing environment; f) decrypting the encrypted next segment of data received at the untrusted computing environment; g) attempting to control the reproduction device using the decrypted data segment such that where the next segment of data is reproduction data, the reproduction device reproduces the portion of the item at the untrusted computing environment in accordance with the instructions included with the data segment, and where the next segment of data is obfuscation data, the reproduction device is unresponsive; and h) iterating steps (a) to (g) until the entire digital asset, or a desired portion of it, has been processed.

The invention relates to a method for producing bone treatment means, with a first step in which original 3D data of a bone or of a bone portion of a specific patient to be treated are made available, wherein a site to be treated is present inside the bone or the bone portion, with a second step involving the use of 3D data of a reference patient who has been selected according to predefined criteria, wherein the 3D data correspond to the bone or to the bone portion with the site to be treated, and with a third and reconstructive step for supplementing or completing 3D data for the reconstruction of the site to be treated, wherein a mirroring step is used in which 3D data of the specific patient to be treated, which have their origin on a mirror-symmetrical other side of the patient, are superposed, specifically at a site corresponding to the bone or bone portion, in order to obtain the combined 3D data.