The use of digital signatures has seen tremendous growth in recent years and with the onset of new technologies, in particular Web-services, promises to be the dominant area in security. Corporate espionage is on the rise, and security can not be overlooked.
Ensure your system vulnerabilities are checked - Cross Site Scripting seems to be the worst offender in modern systems. Make sure your internet-facing applications are hosted on supported and patched platforms. Approach it with an outside-in, basic-first strategy for your IT department instead of focussing on obtuse things like bit-encryption levels first, ensure you can prioritize defenses against the most probably threat vectors first.