Four of five large companies are comfortable with their Internet security, a survey finds, though half of them have adopted no e-commerce security policy.

Information Systems Audit and Control Foundation of Rolling Meadows, Ill., which commissioned the survey from the Deloitte & Touche accounting firm, reported that 81% of the 250 respondents said they are satisfied with their security practices. Only about half, however, had policies on e-commerce security, the firm said, and lack of such policies correlated with inadequate security measures.

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