Encrypted stream processing circuit and method of processing encrypted stream
AssigneeSony Corporation
InventorKaoru YANAMOTO
Life of this patent
Estimating the term…
Abstract
An encrypted-stream processing circuit includes: a decryption mechanism decrypting an encrypted stream; a stream-data processing mechanism separating a plurality of packets included in a stream decrypted by the decryption mechanism in accordance with a packet identifier identifying the packet, and creating a partial stream by extracting a part from the stream under the control of a CPU (Central Processing Unit); and an encryption mechanism encrypting the partial stream, wherein the decryption mechanism, the stream-data processing mechanism, and the encryption mechanism are included in a packaged integrated circuit, and are connected to the CPU through a bus.
Claims6
An encrypted-stream processing circuit comprising:
- decryption means for decrypting an encrypted stream;
- stream-data processing means for separating a plurality of packets included in a stream decrypted by the decryption means in accordance with a packet identifier identifying the packet, and creating a partial stream by extracting a part from the stream under the control of a CPU (Central Processing Unit);
- and
- encryption means for encrypting the partial stream,
- wherein the decryption means, the stream-data processing means, and the encryption means are included in a packaged integrated circuit, and are connected to the CPU through a bus.
A method of processing an encrypted stream, the method comprising the steps of:
- decrypting an encrypted stream;
- separating a plurality of packets included in a stream decrypted in accordance with a packet identifier identifying the packet, and creating a partial stream by extracting a part from the stream under the control of a CPU (Central Processing Unit);
- and
- encrypting the partial stream,
- wherein the individual steps of processing are performed in a packaged integrated circuit connected to the CPU through a bus.
An encrypted-stream processing circuit comprising:
- a decryption mechanism decrypting an encrypted stream;
- a stream-data processing mechanism separating a plurality of packets included in a stream decrypted by the decryption mechanism in accordance with a packet identifier identifying the packet, and creating a partial stream by extracting a part from the stream under the control of a CPU (Central Processing Unit);
- and
- an encryption mechanism encrypting the partial stream,
- wherein the decryption mechanism, the stream-data processing mechanism, and the encryption mechanism are included in a packaged integrated circuit, and are connected to the CPU through a bus.
Dependencies are inferred from the claim text.