On the Joint Security of Encryption and Signature, Revisited
On the Joint Security of Encryption and Signature, Revisited
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DOI:
10.1007/978-3-642-25385-0_9
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发表时间:
2011-12
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影响因子:
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通讯作者:
K. Paterson;Jacob C. N. Schuldt;Martijn Stam;S. Thomson
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文献类型:
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作者:
K. Paterson;Jacob C. N. Schuldt;Martijn Stam;S. Thomson
We revisit the topic of joint security for combined public key schemes, wherein a single keypair is used for both encryption and signature primitives in a secure manner. While breaking the principle of key separation, such schemes have attractive properties and are sometimes used in practice. We give a general construction for a combined public key scheme having joint security that uses IBE as a component and that works in the standard model. We provide a more efficient direct construction, also in the standard model.