Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2011-03-29
2011-03-29
Moazzami, Nasser (Department: 2436)
Cryptography
Video cryptography
Video electric signal modification
C380S240000, C380S242000
Reexamination Certificate
active
07916867
ABSTRACT:
A content receiving apparatus, capable of resuming transmission of a content without assigning a new key even when transmission of the content is suspended, is provided. A content receiving apparatus is an apparatus which receives contents. The content receiving apparatus includes: a key exchange unit which exchanges, with a content transmitting apparatus for transmitting a content, a key which is to be used in encrypting a content and which is valid only for a prescribed period; a reception unit which receives the content encrypted by using the key; a detection unit which detects when a time during which the key is not used reaches a prescribed time; and a transmission unit which transmits, to the content transmitting apparatus, information for not making the key invalid, when it is detected that the time during which the key is not is used has reached the prescribed time.
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Ayaki Yasushi
Okamoto Yuuki
Tanabe Takumi
McDermott Will & Emery LLP
Moazzami Nasser
Panasonic Corporation
Shehni Ghazal
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