公开(公告)号：KR1020130046241A

公开(公告)日：2013-05-07

申请号：KR1020110110705

申请日：2011-10-27

Applicant: 국방과학연구소

Inventor： 허준범 ,  박찬일 ,  황성운 ,  김진수

IPC: H04L9/08 ,  H04L9/14

CPC classification number: H04L9/083 ,  H04L9/0869 ,  H04L9/14 ,  H04L9/3006 ,  H04L9/3073

Abstract: PURPOSE: A broadcast encryption method protecting the privacy of a receiver is provided to guarantee the privacy of a receiver about a transmitted content in a communication environment using a broadcast communication network. CONSTITUTION: An ID based broadcast encryption method comprises a system setup step, a reception key generation or distribution step, an encryption step, and a decryption step. In the system setup step, a bilinear pairing map and a master secret key are selected, a public key is generated. In the reception key generation or distribution step, a secret key about a receiver is generated or distributed. In the encryption step, a message is encoded or broadcast using the ID of a receiver so that the corresponding receiver decodes the broadcast message. In the decryption step, the broadcast message is decoded using a secret key corresponding to the receiver ID. [Reference numerals] (AA) System setup; (B1) Select a system public parameter; (B2) Select a master secret key; (B3) Open a master public key; (CC) Broadcast encryption method; (DD) Generate and distribute a reception key; (E1) Generate a secret key for a receiver; (E2) Transmit the secret key; (FF) Encryption; (G1) Select a receiver group; (G2) Generate a random number; (G3) Calculate a session key; (G4) Generate and transmit a coded message; (H1) ID confidentiality; (H2) All direction safety; (H3) Secret key and decryption computation constant; (II) Decryption; (J1) Calculate a public key using the secret key; (J2) Search a decoded message; (J3) Extract the session key; (J4) Decode the coded message

Abstract translation: 目的：提供一种保护接收机隐私的广播加密方法，以保证接收机在使用广播通信网络的通信环境中对发送的内容的隐私。 构成：基于ID的广播加密方法包括系统设置步骤，接收密钥生成或分发步骤，加密步骤和解密步骤。 在系统设置步骤中，选择双线性配对图和主秘密密钥，生成公钥。 在接收密钥生成或分发步骤中，生成或分发关于接收者的秘密密钥。 在加密步骤中，使用接收器的ID对消息进行编码或广播，使得对应的接收机解码广播消息。 在解密步骤中，使用对应于接收机ID的秘密密钥对广播消息进行解码。 （附图标记）（AA）系统设置; （B1）选择系统公用参数; （B2）选择主密钥; （B3）打开主公钥; （CC）广播加密方式; （DD）生成并分发接收键; （E1）为接收机生成密钥; （E2）发送密钥; （FF）加密; （G1）选择接收器组; （G2）生成随机数; （G3）计算会话密钥; （G4）生成并发送编码消息; （H1）身份机密性; （H2）全方位安全; （H3）秘密密钥和解密计算常数; （二）解密; （J1）使用秘密密钥计算公钥; （J2）搜索解码的消息; （J3）提取会话密钥; （J4）解码编码消息