A checksum is a count of the number of bits in a transmission unit that is included with the unit so that the receiver can check to see whether the same number of bits arrived. If the counts match, it's assumed that the complete transmission was received. Both TCP and UDP communication layers provide a checksum count and verification as one of their services.
This was last updated in June 1997
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Adobe Reader X uses Microsoft's sandboxing technology to block potentially dangerous processes from executing beyond the confines of the software.
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Microsoft repaired four vulnerabilities in its Forefront Unified Access Gateway and a critical flaw in Microsoft Office.
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Download the entire October 2010 issue of Information Security magazine here in PDF format.
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