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What does cross-certification mean? Can I program my app to accept all certificates that are cross-certified by a certain CA? How common practice is this?

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Note that the topic on Cryptography Stack Exchange is more the theoretical side of cryptography, not practical concerns like programming applications. As such, I'm closing this question as off-topic. – Paŭlo Ebermann♦ Oct 14 '12 at 11:45

closed as off topic by Paŭlo Ebermann♦ Oct 14 '12 at 11:45

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