Cryptography – Key management – Having particular key generator
Patent
1995-03-07
1998-05-26
Tarcza, Thomas H.
Cryptography
Key management
Having particular key generator
380 21, 380 49, H04N 144, H04L 900
Patent
active
057579113
ABSTRACT:
An encryption communication terminal includes an encryption key table 9a for registering secret encryption keys and an encryption box 9b for storing received encrypted data. When encrypted data is received, the decryption of the received encrypted data is tried by using a secret encryption key Ki registered in the encryption key table 9a. If the encrypted data can successfully be decrypted by using the registered secret encryption key Ki, the decrypted data is printed out. On the other hand, if the encrypted data cannot be decrypted, the received encrypted data is stored in the encryption box 9b, and then a reception report is output to notify that encrypted data is stored in the encryption box 9b. This reception report lets a recipient user know that encrypted data has been received but cannot be decrypted. The recipient user may ask the transmitter about the secret encryption key Ki to decrypt the received encrypted data.
REFERENCES:
patent: 4944006 (1990-07-01), Citta
patent: 5159630 (1992-10-01), Tseng
patent: 5261003 (1993-11-01), Matsui
patent: 5420922 (1995-05-01), Lunblad
Mita Industrial Co. Ltd.
Tarcza Thomas H.
White Carmen D.
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