Title:
METHOD FOR PREPARING CIPHER ENVELOPE
Document Type and Number:
Japanese Patent JP3130267
Kind Code:
B
Abstract:
PROBLEM TO BE SOLVED: To obtain a method for preparing, distributing, and vending a digital document, and a method for managing access to the digital document by providing a step for enciphering one of information parts by a part enciphering key, and preparing an enciphered part to be housed in an envelope.
SOLUTION: A document part 203 can be enciphered. The enciphered document part 203 can be a 'valuable content' (for example, the chapter of a book, high resolution JPEG picture, or MPEG stream) to be purchased by a user. A non-enciphered part is a 'thesis' (for example, a book review by the others, index, summarization, or low resolution JPEG picture). The purpose of the non-enciphered part is to allow the user to attain the 'preview', 'sampling' or 'browse' of the content of the enciphered envelope before actually purchasing it.
Inventors:
Auerbach, Joshua Seth
Chow, Chee-seng
Kaplan, Marc Adam
Crigler, Jeffrey Charles
Chow, Chee-seng
Kaplan, Marc Adam
Crigler, Jeffrey Charles
Application Number:
JP1997000071388
Publication Date:
November 17, 2000
Filing Date:
March 25, 1997
Export Citation:
Assignee:
INTERNATL BUSINESS MACH CORP <IBM>
International Classes:
G06F21/22; G06F9/06; G06F13/00; G06F21/00; G06Q10/00; G06Q30/00; G07F7/12; G09C1/00; H04L9/08; H04L9/14; H04L9/32; (IPC1-7): G06F1/00; G06F9/06; G06F13/00; G06F15/00; G06F17/60; G09C1/00; H04L9/08; H04L9/14
Previous Patent: SUBSTITUTED PHENYLALKYLIMIDAZOLE DERIVATIVE
Next Patent: PRODUCTION OF BENZOTRIAZOLE
Next Patent: PRODUCTION OF BENZOTRIAZOLE