News of the second Kmart credit-card breach in three years at the retailer and the number of breaches at financial institutions doubling this year over the same period 2016 should raise concerns.

In the second of two-articles, security experts provide strategies to credit unions and businesses to protect credit card data.

Last week, Sears Holdings, the parent company of Kmart, confirmed it experienced another malware-based data breach of its card processing systems, which were infected with a form of malicious code, The company did not reveal how many of its 735 Kmart locations saw signs of a breach.

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