Patent
Encryption method, decoding method and apparatus, and information recording medium
Seiji Higure,Wataru Iba,Toshio Kuroiwa,Takayuki Sugawara,Kenjiro Ueda,健二朗 上田,誠司 日暮,渉 猪羽,隆幸 菅原,俊夫 黒岩 +9 more
- 22 Oct 2001
7
TL;DR: In this paper, an encryption key generator uses a plurality of pieces of information to generate a encryption key and decodes the encryption information to be used as the base for the encryption key.
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Abstract: PROBLEM TO BE SOLVED: To provide an encryption method, etc, capable of improving security more than in the conventional manner SOLUTION: A encryption key generator 27 uses a plurality of pieces of information to generate a encryption key A unitization device 23 unitizes input information, an encryption control information recorder 24 attaches encryption control information for specifying a plurality of pieces of information to be the base for a encryption key, and an encryptor 25 encrypts the encryption control information In decoding unitized encryption information, encryption control information held in each unit is used to specify the information to be the base for a encryption key for the unit, a encryption key is generated from the information to be the base for the encryption key for the unit, and the encryption key is used to decode the encryption information COPYRIGHT: (C)2003,JPO
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Citations
Patent
Encryption method, encryption apparatus, data storage distribution apparatus and data delivery system
Sumie Nakabayashi,Kazuhito Yaegashi,Munemitsu Kuwabara,Hirotake Usami +3 more
- 09 Sep 2005
TL;DR: In this article, a data delivery system for encrypting and decrypting the data to be encrypted by using a random number sequence generated by the random number generating portion for generating the random numbers sequence uniquely decided from an input parameter.
44
Patent
Information recording medium, data processing method, and computer program
Yoshikazu Takashima,Satoshi Kitani,Jun Yonemitsu,Katsumi Muramatsu,Tomoyuki Asano +4 more
- 11 May 2004
TL;DR: In this paper, a configuration for preventing each entity code stored in information recording media from being leaked is presented, where the data setting location in program map table (PMT) is controlled such that these entity codes will not overlap the seed area that provides key generating information.
27
Patent
Transport stream encryption device and its editing device and method for use therein
Yuichi Sakai
- 30 Sep 2004
TL;DR: An encryption device, comprising: detection portion for detecting a TS header, PES header, a sequence header, GOP header, and a sequence end code for a transport stream not encrypted; and encryption portion for encrypting the transport stream except the TS header as mentioned in this paper.
10
Patent
Encrypting device of transport stream, and editing device, and methods for them
Yuichi Sakai,祐一 酒井 +1 more
- 30 Sep 2003
TL;DR: In this article, an encrypting device is provided with a detecting means for detecting a TS (transport stream) header of an unencrypted transport stream, PES (packetized elementary stream), sequence header, GOP (group of picture) header and sequence end code.
3
Patent
Encryption device, decryption device, encryption method, decryption method, and program
TL;DR: In this paper, the authors proposed a method to prevent the leakage of an initialization vector and thereby improve cipher strength in encryption by a ciphertext block chain chain mode, where an encryption device according to the present invention, in performing encryption by CBC mode, generates a prescribed plaintext block from second and subsequent plaintext blocks in accordance with a content indicated by initialization vector generation instruction information and encrypts plaintext data by utilizing the generated initialization vector.
1
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