Sun Microsystems, Inc.

Oracle America, Inc.

John C Pampuch

Avril E Hodges Wilsher

Paul J Rank

Benjamin J Renaud

A method and apparatus is provided for enabling a spreadsheet program with formula support on small devices (like PDAs) while minimizing the amount of memory space used by the program and the accompanying compiled code during transfer of files from the desktop to the small devices. The user can download a spreadsheet file from the desktop to the small device via a conduit. A conduit is any 2-way communication device which connects a desktop to a small device and allows the transfer of data. Conduit software can convert the data to be transferred into a format understandable by both the desktop and PDA programs. The conduit software can also evaluate and parse the formulas and functions needed by the current file before the transfer and generate compiled code for the functions needed by the current file before transfer.

Method and apparatus for formula evaluation in spreadsheets on small devices

Methods, apparatuses and products are provided for establishing and verifying the authenticity of data within one or more data files. In accordance with one aspect of the present invention, a method for verifying the authenticity of data involves providing at least one data file which includes an identifier and a signature file which includes the identifier for the data file as well as a digital signature. The digital signature is then verified using a computer system, and the identifier in the data file is compared with the identifier in the signature file using the computer system. In one embodiment, the identifier for the data file includes at least one certificate authority, site certificate, software publisher identifier, or a site name, and verifying the authenticity of data involves setting a security level for at least one of the certificate authority, the site certificate, the software publisher identifier, and the site name.

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Morgan Hill, CA, United States of America

John C Pampuch