Public-key cryptography and password protocols: the multi-user case
CCS '99 Proceedings of the 6th ACM conference on Computer and communications security
Public-key cryptography and password protocols
ACM Transactions on Information and System Security (TISSEC)
The quest for security in mobile ad hoc networks
MobiHoc '01 Proceedings of the 2nd ACM international symposium on Mobile ad hoc networking & computing
Password-Authenticated Key Exchange between Clients with Different Passwords
ICICS '02 Proceedings of the 4th International Conference on Information and Communications Security
Identity-Based Encryption from the Weil Pairing
CRYPTO '01 Proceedings of the 21st Annual International Cryptology Conference on Advances in Cryptology
Session-Key Generation Using Human Passwords Only
CRYPTO '01 Proceedings of the 21st Annual International Cryptology Conference on Advances in Cryptology
Efficient Password-Authenticated Key Exchange Using Human-Memorable Passwords
EUROCRYPT '01 Proceedings of the International Conference on the Theory and Application of Cryptographic Techniques: Advances in Cryptology
Toward Hierarchical Identity-Based Encryption
EUROCRYPT '02 Proceedings of the International Conference on the Theory and Applications of Cryptographic Techniques: Advances in Cryptology
Password-Authenticated Key Exchange Based on RSA
ASIACRYPT '00 Proceedings of the 6th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
Hierarchical ID-Based Cryptography
ASIACRYPT '02 Proceedings of the 8th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
An Identity-Based Signature from Gap Diffie-Hellman Groups
PKC '03 Proceedings of the 6th International Workshop on Theory and Practice in Public Key Cryptography: Public Key Cryptography
Providing Robust and Ubiquitous Security Support for Mobile Ad Hoc Networks
ICNP '01 Proceedings of the Ninth International Conference on Network Protocols
Authenticated key exchange secure against dictionary attacks
EUROCRYPT'00 Proceedings of the 19th international conference on Theory and application of cryptographic techniques
N-Party encrypted diffie-hellman key exchange using different passwords
ACNS'05 Proceedings of the Third international conference on Applied Cryptography and Network Security
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Public key authentication is necessary to prevent a valid public key of a user from being compromised by a malicious user. Namely, if it is not provided, an adversary can read all encrypted messages between a sender and a receiver by substituting the public key of the receiver with her public key. In general, a certificate issued from and digitally signed by a publicly trusted certificate authority (CA) guarantees public key authentication under the assumption that all users can get the public key of the CA to verify the validity of certificates, i.e., the signatures of the CA. The assumption is practical and widely used in the real world. However, if the CA is down by a system faults or destroyed by a terror or a war, the assumption can not be preserved. In this paper, we propose a simple and practical scheme for public key authentication without any trusted third party. The scheme basically uses a message authentication code (MAC) taking a short random value as a key to authenticate the exchanged public keys. Our scheme also can be adopted in the environments such as ad-hoc or ubiquitous in which it is hard to settle a publicly trusted authority.