音楽コンテンツの超流通とセキュリティ
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1 Superdistribution and the Security of Music Content PHS UAC Universal istribution with Access Control UAC UAC de PC C Abstract Major record companies now provide various lectronic Music istribution (M) services over the Internet. In Japan, M services have been started through mobile phone networks. Fujitsu provides its Universal istribution with Access Control (UAC) as a security infrastructure for superdistributed, highly value-added content, for example, music belonging to a major record company. As a result of UAC, the hit chart was recently distributed by M before being distributed on C. If the spread of broadband networks and remote file exchange applications eventually make it possible for remote users to share and make instant bulk copies of digital content, mechanisms such as UAC that can provide open, flexible, and strong content protection technology are expected to become more important. This paper introduces a UAC-based service called Keitaide-Music (music on your mobile) and describes how the interoperability between mobiles supporting Keitaide-Music and PCs can be realized. UAC UAC RM FUJITSU.52, 5, p (09,2001) 473
2 PHS ( ) UAC Universal istribution with Access Control UAC de PC PC UAC UAC UAC (1) UAC UAC-MB Universal istribution with Access Control - Media Base UAC-MB 1 SSL Secure Socket Layer 2 3 SMI Secure igital Music Initiative (2) PC KIOSK -1-1 Replay TRM TRM 1 TRM 2TRM 3TRM 4 CRL 5TRM 6 CRLTRM PC TRM FUJITSU.52, 5, (09,2001)
3 TRM Tamper Resistant Module TRM PC TRM PC TRM TRM TRM TRM TRM TRM TRM TRM TRM TRM UAC-MB UAC UAC-MB UAC-MB UAC-MB UAC-MB-1 UAC-MBTRM TRM 記録メディア 再生許諾 メディア TRM デコーダ TRM 蓄積媒体 ダウンロード 再生システム 証明書 証明書 暗号化コンテンツ 配信システム 認証局 : 暗号化コンテンツ流通経路 TRM TRM TRM UAC-MB TRM UAC-MB TRM UAC-MB TRM TRM TRM CRL Certificate Revocation List CRL CRL TRM CRL PKIX Public Key Infrastructure X.509 (3) TRM 1 ACm CRL ライセンス ( 復号鍵 ) : ライセンス配信 移動 再生許諾経路 -1 UAC-MB Fig.1-UAC-MB basic service model FUJITSU.52, 5, (09,2001) 475
4 2 ACp 3 CRL TRM TRM -1 TRM -1 1 TRM TRM TRM TRM TRM TRM 2 TRM TRM TRM TRM 35-2 TRM TRM TRM 配信システム端末記録メディアデコーダ コンテンツ 暗号鍵 TRM 認証 証明書 TRM 認証 証明書 再生システム 復号鍵 セッション鍵共有 セッション鍵共有 ACm ACp CRL 復号鍵 ライセンス 個別公開鍵 個別秘密鍵 : 平文の経路 : 暗文の経路 : 二重暗号化文の経路 :TRM : 共通鍵暗号処理 : 共通鍵復号処理 : 公開鍵方式暗号処理 : 公開鍵方式復号処理 -2 Fig.2-Basic secure transformation of license. 476 FUJITSU.52, 5, (09,2001)
5 TRM TRM TRM TRM ACm ACp CRL TRM TRM CRL TRM 1 TRM 2 TRM ACm TRM TRM 2 2TRM UAC-MB TRM レベル 2 コンテンツ レベル 1 コンテンツ 平文コンテンツ : コンテンツ :TRM( メディア / デコーダ ) レベル 2TRM ( レベル 1 コンテンツと平文のみ ) レベル 1TRM TRM なし ( 平文のみ ) : ライセンスを配信 移動 許諾可能な方向 -3 Fig.3-Access control by content protection level. 112 Triple S163 (4) ,024 RSA Rivest Shamir Adelman RSA 1 RSA 2 RSA SCF UAC (1) SCF Super Content istribution Format SCF SCF UAC-MB TRM 4 CRL 5 6 TRM de UAC-MB UAC-MB SCF I SoundMarket FUJITSU.52, 5, (09,2001) 477
6 de de 1 UAC-MB 2 de de 5de PFU de de (5) SoundMarket -4 PHS 64 kbps PFU 1 UAC-MB MP3 MPG1 Audio Layer 3 2 PHS 配信システム コンテンツプロバイダ 再生端末 (PHS) デコーダ TRM 記録メディア PHS 網 受付サーバ 課金サーバ ルータメニューサーバ 配信サーバ コンテンツ受入ライセンス配信コンテンツ配信トランザクション管理課金処理配信実績収集 FireWall コンテンツ管理サーバ プロバイダ登録 コンテンツ受入 コンテンツ登録 配信実績分析 ルータ コンテンツ生成ツール コンテンツ送信ツール 暗号化コンテンツ暗号化ライセンスメニューデータ試聴データコンテンツ情報 課金実績送付 : データ交換経路 LAN ルータ 試聴サーバ LAN CRL 登録 運用管理サーバ ( 監視サーバ ) CRL 認証局 認証システム 失効リスト発行 -4 de Fig.4-Whole compositions of Keitaide-music distribution system. 478 FUJITSU.52, 5, (09,2001)
7 PIAFS PHS Internet Access Forum StandardTCP/IP UAC-MB 3 CRL CRL 4 CRL CRL UAC-MB UAC-MB UAC-MBI I B 3 B PHS de UAC-MB 2TRM MMC Secure Multi MediaCard 2TRM TRM UAC-MB TRM UAC-MB UAC-MB PC UAC-MB PC PC de PHS PC (6) de PC PC de FUJITSU.52, 5, (09,2001) 479
8 1 PHS PC 2 C-ROM 3 C MP3 PC PCPC MMC -5 MMC 64 M 20 MMC PC C-ROMSCF MMCPHS C-ROM 45 PC C MP3 SCF SMI MMC PHS PCPHS PC MMC 1 2 PC 2 MMC TRM1 PC TRM de MP3 データ 音楽 C C-ROM 超流通 C-ROM コンテンツプロバイダ PC MP3 テ ータ取込み 音楽データ取込み PCソリューションアプリケーションプログラム SCF 取込み KdM 再生端末対応 PHS セキュアセキュア MMC ライセンス コンテンツ購入 ダウンロードした楽曲のバックアップ チェックアウト / コピーバックアップ リストア リーダセキュアセキュアライタ MMC -5 PC Fig.5-xample of PC solution. 480 FUJITSU.52, 5, (09,2001)
9 MMC UAC 1 UAC 2 3 UAC 4 UAC 5 AV UAC-MB TRM UAC-MB SoundMarket UAC C UAC UAC UAC SMI Portable evice Specification-Part 1-Version July 1999 SCUR IGITAL MUSIC INITIATIV 3 FUJITSU Vol.48 No.2 p FUJITSU Vol.50 No.4 p de de Part1 Version deuac-mb Part 1 Version UAC-MB FUJITSU.52, 5, (09,2001) 481
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