A few weeks back, HR and financial management firm Workday.com sent a security advisory to customers warning that crooks were sending targeted malware phishing attacks at customers. At the same time, Workday is publishing on its site a list of more than 800 companies that use its services, making it relatively simple for attackers to chose their targets. This post examines whether it makes sense for software-as-a-service (SaaS) companies to publish lists of their customers when those customers are actively under siege from phishers impersonating the SaaS provider. At its most basic, security always consists of trade-offs.

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