[특허]Ensuring authenticity in a closed content distribution system

Ensuring authenticity in a closed content distribution system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06F-021/00 H04L-009/08 H04L-009/16 H04L-009/32 G06F-021/60 G06F-021/10
출원번호	US-0475806 (2017-03-31)
등록번호	US-9985781 (2018-05-29)
발명자 / 주소	Princen, John Srinivasan, Pramila Blythe, David Yen, Wei
출원인 / 주소	Acer Cloud Technology, Inc.
대리인 / 주소	Sheppard, Mullin, Richter & Hampton LLP
인용정보	피인용 횟수 : 0 인용 특허 : 133

초록

A technique for maintaining encrypted content received over a network in a secure processor without exposing a key used to decrypt the content in the clear is disclosed.

대표청구항 ▼

1. A method executed by a secure processor of a secure player, the secure player comprising secure memory secured against access outside the secure player and insecure memory, the method comprising: receiving encrypted content comprising a plurality of data portions in an encrypted format;receiving a license having a first cryptographic key and a plurality of signatures, the first cryptographic key configured to facilitate first decryption of the encrypted content, and each of the plurality of signatures configured to verify validity of at least one of the plurality of data portions, the license;performing the first decryption of the encrypted content using the first cryptographic key;verifying the validity of the plurality of data portions using the plurality of signatures;generating, in response to verifying the validity, a second cryptographic key to facilitate re-encryption of the encrypted content, the second cryptographic key being independent of the first decryption key;storing the second cryptographic key in the secure memory;performing the re-encryption of the encrypted content using the second cryptographic key to obtain re-encrypted content;storing the re-encrypted content in the insecure memory. 2. The method of claim 1, wherein the plurality of data portions comprises a plurality of data chunks. 3. The method of claim 1, further comprising: determining if verifying the validity of the plurality of data portions fails;limiting access to the plurality of data portions if verifying the validity of the plurality of data portions fails. 4. The method of claim 1, wherein verifying the validity of the plurality of data portions comprises performing a run-time verification of the validity of the plurality of data portions. 5. The method of claim 1, further comprising maintaining an association between the second cryptographic key and the re-encrypted content. 6. The method of claim 1, further comprising: maintaining association data between the second cryptographic key and the re-encrypted content;storing the association data in an external storage external to the secure player. 7. The method of claim 1, wherein one or more of the first cryptographic key and the second cryptographic key is part of a cryptographic key pair used for the secure player. 8. The method of claim 1, wherein the encrypted content comprises multimedia content or game content. 9. The method of claim 1, wherein the encrypted content is received from a dynamic content server configured to dynamically create the encrypted content. 10. The method of claim 1, wherein the content is encrypted at a content server. 11. A secure player comprising: secure memory;insecure memory;a secure processor coupled to the secure memory and the insecure memory, the secure processor configured to execute a computer-implemented method, the computer-implemented method comprising: receiving encrypted content comprising a plurality of data portions in an encrypted format;receiving a license having a first cryptographic key and a plurality of signatures, the first cryptographic key configured to facilitate first decryption of the encrypted content, and each of the plurality of signatures configured to verify validity of at least one of the plurality of data portions, the license;performing the first decryption of the encrypted content using the first cryptographic key;verifying the validity of the plurality of data portions using the plurality of signatures;generating, in response to verifying the validity, a second cryptographic key to facilitate re-encryption of the encrypted content, the second cryptographic key being independent of the first decryption key;storing the second cryptographic key in the secure memory;performing the re-encryption of the encrypted content using the second cryptographic key to obtain re-encrypted content;storing the re-encrypted content in the insecure memory. 12. The secure player of claim 11, wherein the plurality of data portions comprises a plurality of data chunks. 13. The secure player of claim 11, wherein the computer-implemented method further comprises: determining if verifying the validity of the plurality of data portions fails;limiting access to the plurality of data portions if verifying the validity of the plurality of data portions fails. 14. The secure player of claim 11, wherein verifying the validity of the plurality of data portions comprises performing a run-time verification of the validity of the plurality of data portions. 15. The secure player of claim 11, further comprising maintaining an association between the second cryptographic key and the re-encrypted content. 16. The secure player of claim 11, wherein the computer-implemented method further comprises: maintaining association data between the second cryptographic key and the re-encrypted content;storing the association data in an external storage external to the secure player. 17. The secure player of claim 11, wherein one or more of the first cryptographic key and the second cryptographic key is part of a cryptographic key pair used for the secure player. 18. The secure player of claim 11, wherein the encrypted content comprises multimedia content or game content. 19. The secure player of claim 11, wherein the encrypted content is received from a dynamic content server configured to dynamically create the encrypted content. 20. The secure player of claim 11, wherein the content is encrypted at a content server.

이 특허에 인용된 특허 (133)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

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Ensuring authenticity in a closed content distribution system 원문보기

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연합인증

Ensuring authenticity in a closed content distribution system 원문보기

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