Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Central trusted authority provides computer authentication
Reexamination Certificate
2006-01-24
2006-01-24
Moise, Emmanuel L. (Department: 2137)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Central trusted authority provides computer authentication
C713S160000, C705S051000
Reexamination Certificate
active
06990578
ABSTRACT:
When electronic mail is to be sent by an off-line user to a recipient who holds a digital certificate, the sender's mail program allows the sender to compose the mail, but the mail is placed in plain text in the sender's local outbox and flagged for subsequent encryption. When the sender later connects to a mail server to send the outgoing mail, the sender's mail software, in response to the flagged mail will request the recipient's certificate from the server and use the received certificate to encrypt the mail message before it leaves the sender's workstation. In accordance with one embodiment of the invention, after using a digital certificate to encrypt a mail message, the certificate is discarded. In accordance with another embodiment, if the certificate is not available or located by the mail server, a message is sent to the sender informing him that the certificate cannot be located and the mail cannot be sent in encrypted form. At that point, the sender has an option to resend the mail in unencrypted form.
REFERENCES:
patent: 5552897 (1996-09-01), Mandelbaum et al.
patent: 5778071 (1998-07-01), Caputo et al.
patent: 5815577 (1998-09-01), Clark
patent: 5903651 (1999-05-01), Kocher
patent: 6055240 (2000-04-01), Tunnicliffe
patent: 6292895 (2001-09-01), Baltzley
patent: 6356937 (2002-03-01), Montville et al.
patent: 6381695 (2002-04-01), Kudo et al.
patent: 6430691 (2002-08-01), Di Santo et al.
patent: 6609114 (2003-08-01), Gressel et al.
patent: 2002/0161709 (2002-10-01), Floyd et al.
How to Set up the Paladin E-mail Client, www.circa.ufl.edu/handouts/softdist/paladin/paladin.html, pp. 1-6, Aug. 18, 1997.
Crocker, D., Standard for the Format of ARPA Internet Text Messages, RFC-822, IETF, pp. 1-39, Aug. 13, 1982.
PGP for Personal Privacy, v 5.5, User Guide, Nework Associates, Inc., pp. 1-150, 1998.
Ramsdell, B., S/MIME Version 3 Message Specification, RFC-2633, pp. 1-24, Jun. 1999.
How to Set up the Paladin E-mail Client, www.circa.ufl.edu/handouts/softdist/paladin.html, pp. 1-6, Aug. 18, 1997.
Crocker, D., “Standard for the Format of ARPA Internet Text Messages”, RFC-822, IETF, pp. 1-42, Aug. 13, 1982.
Beckhardt Steven R.
Conmy Douglas W.
Lorenson Elizabeth A.
O'Brien Michael R.
Fields Courtney
International Business Machines Corp.
Kudirka & Jobse LLP
Moise Emmanuel L.
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