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METHOD, CONTENT OWNER DEVICE, COMPUTER PROGRAM, AND COMPUTER PROGRAM PRODUCT FOR DISTRIBUTING CONTENT ITEMS TO AUTHORIZED USERS
METHOD, CONTENT OWNER DEVICE, COMPUTER PROGRAM, AND COMPUTER PROGRAM PRODUCT FOR DISTRIBUTING CONTENT ITEMS TO AUTHORIZED USERS
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机译:用于将内容项分配给授权用户的方法,内容所有者设备,计算机程序和计算机程序产品
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摘要
Disclosed is, among other things, a method for distributing content items to authorized users. The method comprising: a content owner device (190), COD, obtaining a first content item (196a); the COD (190) obtaining a first tag associated with the first content item (196a); the COD (190) obtaining a first content key, CK1, for said first content item (196a); the COD (190) encrypting the first content item (196a) using CK1, thereby producing a first encrypted content item; the COD (190) using at least the first tag and a key derivation function, KDF, to derive a first derived key, DK1; the COD (190) encrypting CK1 using the DK1, thereby producing a first encrypted content key, ECK1; and the COD (190) transmitting information to a content server (108), the information comprising: the first encrypted content item and the first tag.
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