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One-time signature scheme

Define one-time signature scheme?

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The one-time signature scheme permits the signature of only a single message by using a specified piece of private (and public) information. One benefit of such a scheme is that it is usually quite fast. Though, the scheme tends to be unwieldy whenever employed to authenticate multiple messages since additional data requires to be generated to both sign and confirm each new message. By disparity, with conventional signature schemes such as RSA.   

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