Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Patent
1998-03-12
2000-04-11
Swann, Tod R.
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
713 1, 713200, 707204, 39518204, H04L 900
Patent
active
060498749
ABSTRACT:
A system backs up computer files to a remote site via modem, LAN, WAN, or other network device 16. Files of a user computer that are found in a common library at the remote site initially are not copied to the remote site, whereas files not in the library are copied to the remote site and potentially automatically added to the library when a sufficient number of computers contain the files. Then, periodically or continuously if the user is online via the modem, the user computer determines which blocks have been changed, and the user computer transmits only changed blocks to the remote site. The blocks are gathered in "chunk" files, and when a chunk file reaches a predetermined size, it is transmitted to the remote site for updating the back up version of the respective file. The process then resumes identifying changed blocks. In addition to flagging the changed block for transfer, the process resynchronizes the local data file with the backed up version using a two-step comparison, first comparing the first two characters in the block with a pre-stored character set, and then, if the first comparison results in a match, comparing a digital signature of the changed block with a pre-stored signature. If either comparison results in a mismatch, the test is repeated using, as the first byte of the test block, the next byte in the sequence. Novel encryption procedures are also disclosed.
REFERENCES:
patent: 3711863 (1973-01-01), Bloom
patent: 3715734 (1973-02-01), Fajans
patent: 4361832 (1982-11-01), Cole
patent: 4377000 (1983-03-01), Staab
patent: 4491934 (1985-01-01), Heinz
patent: 4558302 (1985-12-01), Welch
patent: 4616315 (1986-10-01), Logsdon et al.
patent: 4641274 (1987-02-01), Swank
patent: 4654819 (1987-03-01), Stiffler et al.
patent: 4686620 (1987-08-01), Ng
patent: 4727509 (1988-02-01), Johnson et al.
patent: 4792896 (1988-12-01), Maclean et al.
patent: 4807182 (1989-02-01), Queen
patent: 4819154 (1989-04-01), Stiffier et al.
patent: 4881075 (1989-11-01), Weng
patent: 4893307 (1990-01-01), McKay et al.
patent: 4910666 (1990-03-01), Nibby, Jr. et al.
patent: 4914576 (1990-04-01), Zelley et al.
patent: 5008936 (1991-04-01), Hamilton et al.
patent: 5043871 (1991-08-01), Nishigaki et al.
patent: 5051947 (1991-09-01), Messenger et al.
patent: 5060185 (1991-10-01), Naito et al.
patent: 5133065 (1992-07-01), Cheffetz et al.
patent: 5155845 (1992-10-01), Beal et al.
patent: 5163148 (1992-11-01), Walls
patent: 5193154 (1993-03-01), Kitajima et al.
patent: 5202982 (1993-04-01), Gramlich et al.
patent: 5210866 (1993-05-01), Milligan et al.
patent: 5212772 (1993-05-01), Masters
patent: 5212784 (1993-05-01), Sparks
patent: 5235601 (1993-08-01), Stallmo et al.
patent: 5239637 (1993-08-01), Davis et al.
patent: 5239647 (1993-08-01), Anglin et al.
patent: 5239659 (1993-08-01), Rudeseal et al.
patent: 5241668 (1993-08-01), Eastridge et al.
patent: 5263154 (1993-11-01), Eastridge et al.
patent: 5274802 (1993-12-01), Altine
patent: 5274807 (1993-12-01), Hoshen et al.
patent: 5276860 (1994-01-01), Fortier et al.
patent: 5276865 (1994-01-01), Thorpe
patent: 5278838 (1994-01-01), Ng et al.
patent: 5293613 (1994-03-01), Hayden et al.
patent: 5295258 (1994-03-01), Jewett et al.
patent: 5321832 (1994-06-01), Ianaka et al.
patent: 5347653 (1994-09-01), Flynn et al.
patent: 5357607 (1994-10-01), Sathi et al.
patent: 5367698 (1994-11-01), Webber et al.
patent: 5375232 (1994-12-01), Legvold et al.
patent: 5404508 (1995-04-01), Konrad et al.
patent: 5416840 (1995-05-01), Cane et al.
patent: 5435004 (1995-07-01), Cox et al.
patent: 5438671 (1995-08-01), Miles
patent: 5446871 (1995-08-01), Shomler et al.
patent: 5448718 (1995-09-01), Cohn et al.
patent: 5454099 (1995-09-01), Myers et al.
patent: 5475834 (1995-12-01), Anglin et al.
patent: 5479654 (1995-12-01), Squibb
patent: 5495533 (1996-02-01), Linehan et al.
patent: 5497483 (1996-03-01), Beardsley et al.
patent: 5506986 (1996-04-01), Healy
patent: 5513314 (1996-04-01), Kandasamy et al.
patent: 5513351 (1996-04-01), Grantz
patent: 5515502 (1996-05-01), Wood
patent: 5546534 (1996-08-01), Malcolm
patent: 5548750 (1996-08-01), Larsson et al.
patent: 5559991 (1996-09-01), Kanfi
patent: 5564037 (1996-10-01), Lam
patent: 5566331 (1996-10-01), Irwin, Jr. et al.
patent: 5574906 (1996-11-01), Morris
patent: 5584023 (1996-12-01), Hsu
patent: 5586322 (1996-12-01), Beck et al.
patent: 5594900 (1997-01-01), Cohn et al.
patent: 5596706 (1997-01-01), Shimazaki et al.
patent: 5604862 (1997-02-01), Midgely et al.
patent: 5606693 (1997-02-01), Nilsen et al.
patent: 5615364 (1997-03-01), Marks
patent: 5623662 (1997-04-01), McIntosh
patent: 5640561 (1997-06-01), Satoh et al.
patent: 5649089 (1997-07-01), Kilner
patent: 5649196 (1997-07-01), Woodhill et al.
patent: 5659614 (1997-08-01), Bailey, III
patent: 5659743 (1997-08-01), Adams et al.
patent: 5664186 (1997-09-01), Bennett et al.
patent: 5668986 (1997-09-01), Nilsen et al.
patent: 5668991 (1997-09-01), Dunn et al.
patent: 5671350 (1997-09-01), Wood
patent: 5673381 (1997-09-01), Huai et al.
patent: 5675725 (1997-10-01), Malcolm
patent: 5708820 (1998-01-01), Park et al.
patent: 5713024 (1998-01-01), Halladay
patent: 5765173 (1998-06-01), Cane et al.
patent: 5778395 (1998-07-01), Whiting et al.
patent: 5794254 (1998-08-01), McClain
patent: 5799141 (1998-08-01), Galipeau et al.
patent: 5864853 (1999-01-01), Kimura et al.
Bolt Thomas B.
McClain Fred W.
Coddington Trevor Quick
Fairbanks Systems Group
Rogitz John L.
Swann Tod R.
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