JPH11298874A5 - - Google Patents
Info
- Publication number
- JPH11298874A5 JPH11298874A5 JP1998208909A JP20890998A JPH11298874A5 JP H11298874 A5 JPH11298874 A5 JP H11298874A5 JP 1998208909 A JP1998208909 A JP 1998208909A JP 20890998 A JP20890998 A JP 20890998A JP H11298874 A5 JPH11298874 A5 JP H11298874A5
- Authority
- JP
- Japan
- Prior art keywords
- encrypted
- types
- encryption
- key
- scramble
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Claims (2)
前記スクランブル鍵を使って番組データを暗号化し、暗号化番組データを出力する番組スクランブラと、
前記スクランブル鍵を暗号化するための２種類の暗号鍵を生成する暗号鍵生成手段と、
前記２種類の暗号鍵を使って前記スクランブル鍵を暗号化し、２種類の暗号化スクランブル鍵を出力するスクランブル鍵暗号手段と、
前記２種類の暗号鍵の暗号化を行ない、２種類の暗号化暗号鍵を出力する暗号鍵暗号手段と、
前記番組スクランブラから出力された暗号化番組データ、前記スクランブル鍵暗号手段から出力された２種類の暗号化スクランブル鍵、及び、前記暗号鍵暗号手段から出力された２種類の暗号化暗号鍵を多重化し、多重化情報を出力する多重化手段と、
前記多重化情報を送信する送信手段と
を備える放送送信装置。 a scramble key generating means for generating a scramble key for scrambling program data;
a program scrambler that encrypts program data using the scramble key and outputs the encrypted program data;
an encryption key generating means for generating two types of encryption keys for encrypting the scramble key;
a scramble key encryption means for encrypting the scramble key using the two types of encryption keys and outputting two types of encrypted scramble keys;
an encryption key encryption means for encrypting the two types of encryption keys and outputting the two types of encrypted encryption keys;
a multiplexing means for multiplexing the encrypted program data output from the program scrambler, the two types of encrypted scramble keys output from the scramble key encryption means, and the two types of encrypted encryption keys output from the encryption key encryption means, and outputting multiplexed information;
a transmitting means for transmitting the multiplexed information;
A broadcast transmitting device comprising :
前記多重化情報から前記暗号化番組データと前記２種類の暗号化スクランブル鍵と前記２種類の暗号化暗号鍵とを分離して出力する分離手段と、
前記２種類の暗号化暗号鍵から２種類の暗号鍵を復号化する暗号鍵復号手段と、
前記暗号化番組データと前記２種類の暗号化スクランブル鍵の内の一方の暗号化スクランブル鍵とを蓄積保管する保管手段と、
前記保管手段に蓄積保管された暗号化番組データの視聴が選択されたとき、前記暗号鍵復号手段が復号化した一方の暗号鍵を用いて、前記保管手段に蓄積保管された前記一方の暗号化スクランブル鍵の復号化を行い、また、現在の受信情報に含まれる暗号化番組データの視聴が選択されたとき、前記暗号鍵復号手段が復号化した他方の暗号鍵を用いて、現在の受信情報に含まれる他方の暗号化スクランブル鍵の復号化を行い、スクランブル鍵を出力するスクランブル鍵復号手段と、
前記保管手段に蓄積保管された暗号化番組データの視聴が選択されたとき、前記スクランブル鍵復号手段から出力された前記スクランブル鍵を用いて、前記保管手段に蓄積保管された前記暗号化番組データを復号化し、また、現在の受信情報に含まれる暗号化番組データの視聴が選択されたとき、前記スクランブル鍵復号手段から出力された前記スクランブル鍵を用いて、現在の受信情報に含まれる前記暗号化番組データを復号化して、番組データを出力する番組デスクランブラと
を備える放送受信装置。 a receiving means for receiving, from a broadcast transmitting device, multiplexed information in which encrypted program data encrypted with a scramble key, two types of encrypted scramble keys obtained by encrypting the scramble key using two types of encryption keys, and two types of encrypted encryption keys obtained by encrypting the two types of encryption keys are multiplexed;
a separating means for separating and outputting the encrypted program data, the two types of encrypted scramble keys, and the two types of encrypted encryption keys from the multiplexed information;
an encryption key decryption means for decrypting the two types of encryption keys from the two types of encrypted encryption keys;
a storage means for storing and storing the encrypted program data and one of the two types of encrypted scramble keys;
scramble key decryption means for decrypting one of the encrypted scramble keys stored in the storage means using one of the encryption keys decrypted by the encryption key decryption means when viewing of the encrypted program data stored in the storage means is selected, and for decrypting the other encrypted scramble key included in the currently received information using the other encryption key decrypted by the encryption key decryption means when viewing of the encrypted program data included in the currently received information is selected, and outputting the scramble key;
a program descrambler that, when viewing of the encrypted program data stored in the storage means is selected, decrypts the encrypted program data stored in the storage means using the scrambling key output from the scrambling key decryption means, and, when viewing of the encrypted program data included in the currently received information is selected, decrypts the encrypted program data included in the currently received information using the scrambling key output from the scrambling key decryption means, and outputs the program data;
A broadcast receiving device comprising :
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20890998A JP4058167B2 (en) | 1998-02-16 | 1998-07-24 | Storage type broadcast receiving apparatus, broadcast receiving method, transmitting apparatus, and transmitting method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3246398 | 1998-02-16 | ||
| JP10-32463 | 1998-02-16 | ||
| JP20890998A JP4058167B2 (en) | 1998-02-16 | 1998-07-24 | Storage type broadcast receiving apparatus, broadcast receiving method, transmitting apparatus, and transmitting method |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JPH11298874A JPH11298874A (en) | 1999-10-29 |
| JPH11298874A5 true JPH11298874A5 (en) | 2005-10-20 |
| JP4058167B2 JP4058167B2 (en) | 2008-03-05 |
Family
ID=26371043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20890998A Expired - Fee Related JP4058167B2 (en) | 1998-02-16 | 1998-07-24 | Storage type broadcast receiving apparatus, broadcast receiving method, transmitting apparatus, and transmitting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4058167B2 (en) |
-
1998
- 1998-07-24 JP JP20890998A patent/JP4058167B2/en not_active Expired - Fee Related
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