Identity-based cryptosystems and signature schemes
Proceedings of CRYPTO 84 on Advances in cryptology
A new signature scheme based on the DSA giving message recovery
CCS '93 Proceedings of the 1st ACM conference on Computer and communications security
Proxy signatures for delegating signing operation
CCS '96 Proceedings of the 3rd ACM conference on Computer and communications security
Introduction to cryptography: principles and applications
Introduction to cryptography: principles and applications
Handbook of Applied Cryptography
Handbook of Applied Cryptography
Convertible authenticated encryption scheme
Journal of Systems and Software
ICICS '97 Proceedings of the First International Conference on Information and Communication Security
New directions in cryptography
IEEE Transactions on Information Theory
A novel anonymous proxy signature scheme
Advances in Multimedia
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Elaborating on the merits of proxy signature schemes and convertible authenticated encryption (CAE) schemes, we adopt self-certified public key systems to construct efficient proxy CAE schemes enabling an authorized proxy signer to generate an authenticated ciphertext on behalf of the original signer. To satisfy the requirement of confidentiality, only the designated recipient is capable of decrypting the ciphertext and verifying the proxy signature. A significant advantage of the proposed schemes is that the proxy signature conversion process takes no extra cost, i.e., when the case of a later dispute over repudiation occurs, the designated recipient can easily reveal the ordinary proxy signature for the public arbitration. If needed, the designated recipient can also convince anyone that he is the real recipient. In addition, integrating with self-certified public key systems, our schemes can earn more computational efficiency, since authenticating the public key and verifying the proxy signature can be simultaneously carried out within one-step.