Abstract: A non-algebraic method of encrypting and decrypting data. A cryptographic algorithm based on the properties of certain nonlinear equations is used to encrypt and decrypt data without algebraic computations. In particular, the present invention utilizes those nonlinear equations for which the solution space includes attractors to obtain intractable quantities and then operates on clear text data and the intractable quantities to produce secure cipher text. Data needed or desirable for decryption are retained during the encryption process, thus optimizing the decryption process of the present invention.

Abstract: A system and method for imprinting a digital image with an identifier using black metamers. Black metamers provide an addition to the radiometric signature of the original digital image that is imperceptible to human vision. The identifier may include, but is not limited to, watermarks, fingerprints, textual additions, steganography and identification tags. The digital image is processed and imprinted frame by frame by adding black metamers to the fundamental metamer of selected pixels in a frame. The black metamers imprint the identifier into the digital image without changing the way in which the image is perceived visually. To verify that a copy of a digital image imprinted with an identifier has been made, the suspected copy of the digital image is stripped of all fundamental metamers to reveal only its black metamers. The presence of an identifier within the black metamers is evidence that the suspected copy is in fact a copy of a digital image.

Abstract: A system and method for copy protecting digital cinema products. Digital cinema products are protected by encryption using the encryption mode of a non-algebraic cryptographic engine (NACE) that permits digital content to be encrypted at exceptionally high data rates. Using a key ex change protocol, the user of an encrypted digital cinema product decrypts the encrypted digital cinema product using the decryption mode the NACE at data rates that allow the content to be viewed and/or displayed without the need for intermediate storage of the clear text data. To further protect the content of the digital cinema product, a black metamer imprinting engine (BMIE) is used to imprint the user's copy of the digital cinema product content with an identifier chosen by the originator.

Abstract: A non-algebraic cryptographic architecture. The non-algebraic cryptographic architecture is a logical implementation of a non-algebraic cryptographic engine (sometimes referred to as a “NACE”). The architecture uses a NACE in conjunction with cryptographic key lengths up to 2048 bits to achieve real-time encryption at speeds sufficient to permit wideband digital data to be decrypted in real time thereby obviating the need for store-and-forward. The architecture is inherently parallel and can accept extended block lengths, which are several multiples of the length of the cryptographic key.

Abstract: A digital image (27) is taken by a digital camera (12) and a serial number (22) is associated with the digital image. The digital image is encrypted by the camera using a camera key (20) to form an encrypted image (28). The encrypted image is then communicated to an authentication center (14). The authentication center associates the encrypted image with the serial number identifying the camera and an encrypted camera key (50). At a later time, a digital image is sent by a verifying entity (16) to the authorization center to determine if the digital image has been altered. The authorization center then decrypts the encrypted image, compares the digital image to the decrypted encrypted image and reports the result to the verifying entity. Also, the digital image is encrypted. The digital image is partitioned into at least one partition. A P box is applied to each partition. A first and second S box are applied to each partition.

Abstract: A digital image (27) is taken by a digital camera (12) and a serial number (22) is associated with the digital image. The digital image is encrypted by the camera using a camera key (20) to form an encrypted image (28). The encrypted image is then communicated to an authentication center (14). The authentication center associates the encrypted image with the serial number identifying the camera and an encrypted camera key (50). At a later time, a digital image is sent by a verifying entity (16) to the authorization center to determine if the digital image has been altered. The authorization center then decrypts the encrypted image, compares the digital image to the decrypted encrypted image and reports the result to the verifying entity. Also, the digital image is encrypted. The digital image is partitioned into at least one partition. A P box is applied to each partition. A first and second S box are applied to each partition.

Abstract: A digital image (27) is taken by a digital camera (12) and a serial number (22) is associated with the digital image. The digital image is encrypted by the camera using a camera key (20) to form an encrypted image (28). The encrypted image is then communicated to an authentication center (14). The authentication center associates the encrypted image with the serial number identifying the camera and an encrypted camera key (50). At a later time, a digital image is sent by a verifying entity (16) to the authorization center to determine if the digital image has been altered. The authorization center then decrypts the encrypted image, compares the digital image to the decrypted encrypted image and reports the result to the verifying entity. Also, the digital image is encrypted. The digital image is partitioned into at least one partition. A P box is applied to each partition. A first and second S box are applied to each partition.