Abstract: A device (3400) for processing an encrypted data stream (3401), wherein the device (3400) comprises a decrypting unit (3402) for generating a decrypted data stream (3403) from the encrypted data stream (3401), a detecting unit (3404) for detecting position information of at least one intra-coded frame in the decrypted data stream (3403), and a replacement unit (3405) for replacing, based on the detected position information, portions of the encrypted data stream (3401) by corresponding portions of the decrypted data stream (3403).

Abstract: A device (3200) for processing an encrypted data stream (3201) in a cryptographic system, in which decryption data (3204) are provided for decrypting each segment (3202) of the encrypted data stream (3201) for reproduction of the decrypted data stream, wherein the device (3200) comprises a first determining unit (3209) for determining, in case of switching from a first reproduction mode (1501) of reproducing the data stream (3201) to a second reproduction mode (1502) of reproducing the data stream (3201), a current position of reproduction within the data stream, and a second determining unit (3210) for determining a starting position for starting reproduction in the second reproduction mode (1502) based on the determined current position.

Abstract: The invention describes an apparatus, system and related method that allow a guest user to create a private personal virtual channel. The apparatus includes a user interface (8) whereby an authorized apparatus user can make an invitation to a guest user. The authorized apparatus user can also set expiry conditions (19). The apparatus can exchange guest user specific data (2, 3, 4) via user interface (8), via a data carrier (18), or via a network (17) with an equivalent apparatus in the system. The private user specific data (2, 3, 4) is concealed using a concealment unit (14). A control unit (13) works in combination with a processing unit (11) and the concealment unit (14) to conceal recorded content based upon guest user preferences and presents the concealed recorded content to the guest user alone as a continuous sequence of content via display (15) emulating a traditional broadcasted channel.

Abstract: A device (3000) for processing an encrypted data stream (3001), wherein decryption messages are provided for decrypting each segment (1403) of the encrypted data stream (3001), wherein each decryption message comprises a number of decryption elements, wherein the device (3000) comprises a detection unit (3002) for detecting the number of decryption elements per decryption message, and a determining unit (3003) for determining a position for providing the decryption messages in relation to the sequence of the segments (1403), based on the detected number.