Many of the more efficient __________ signature schemes have the drawback that the signer must keep a record of the exact number of previously signed messages, and any error in this record will result in insecurity.

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The Answer of Many of the more efficient __________ signature schemes have the drawback that the signer must keep a record of the exact number of previously signed messages, and any error in this record will result in insecurity.

Many of the More Efficient __________ Signature Schemes Have the Drawback