Decryption key management scheme for software distribution syste

Details Decryption key management scheme for software distribution syste Decryption key management scheme for software distribution syste

1996-07-30

2000-06-13

Noori, Max

Cryptography

Particular algorithmic function encoding

380 25, 380 4, H04L 900

Patent

active

060758627

ABSTRACT:
A decryption key management scheme for a software distribution system utilizing the decryption key, which can enable the re-install of the software that was decrypted once by a proper procedure, without requiring a re-acquisition of the decryption key from the software vender, so that a user can freely delete and re-install the software that was properly obtained once. The decryption key is searched in a memory device of a user's computer, or acquired from a distribution source of the encrypted software when the decryption key is not found in the memory means. Then, the encrypted software is decrypted by using the obtained decryption key, and a decrypted software content is installed into the memory device, while the decryption key acquired from the distribution source is stored into the memory device, such that the decryption key stored in the memory device is utilizable in decrypting the encrypted software at a time of re-installing the encrypted software.

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