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Patent

Cipher communication equipment and its system

TLDR
In this paper, the authors proposed a scheme to charge a user executing cipher communication to obtain a proper cipher system in accordance with ciphering processing speeds and information for ciphering cipher intensity and charge corresponding to the selected cipher system.
Abstract
PURPOSE: To suitably charge a user executing cipher communication. CONSTITUTION: Each of an information presenting side communication terminal 10 and a user side communication terminal 10 is provided with plural ciphering devices 11 having respectively different cipher systems and a selection means 14 for selecting one of the devices 11. A key corresponding to the selected cipher system is generated by a key generating/selecting means 13. An amount corresponding to a cipher system selected by a charging means included in an information presenting center is charged to the user. Thus a proper cipher system is selected in accordance with ciphering processing speeds included in plural cipher systems or the sort of information for ciphering cipher intensity and charge corresponding to the selected cipher system can be properly executed. COPYRIGHT: (C)1997,JPO

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Patent

Certificate meter with selectable indemnification provisions

TL;DR: In this article, a system for creating and attaching a digital signature to a message is described, which includes an accounting register, a memory having stored therein a plurality of different indemnification provisions and a pluralityof different service rates each associated with a corresponding one of the plurality of differing indemnification provision.
Patent

Secret communication system and method for generating shared secret information

TL;DR: In this paper, the degree of security of an updated key in quantum key distribution is reflected in a user request in order to determine the amount of information with the possibility of being intercepted that is removed from the key information after error correction.
Patent

Encryption apparatus, encryption method, and program

Koji Suzuki, +1 more
TL;DR: In this article, a key length deciding apparatus has a configuration provided with a protective strength acquiring means (S4) for acquiring protective strength information representing the information to be protected by encryption, and a key size computing means (103) for computing the length of a key to be used in encryption of the information on the basis of the protection strength information.
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Storage system, data moving method and management computer

TL;DR: In this article, the authors propose a storage system where a storage device having a data area 120 and allowing access from a host computer is selected as a moving destination of the data, and the data movement is executed, or the cipher calculation method applied to cipher calculation of the cipher data is updated to the other method by processing inside the device and is newly stored.
Patent

Information transmission apparatus and method, information reception apparatus and method, and information-providing system

TL;DR: In this paper, an information transmission apparatus for encrypting and transmitting first data and second data is described, including an encryption element for deriving a second key from a first key by using an irreversible function.