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An Efficient Certificateless Authenticated Key Agreement Scheme: Enhancing Security in Online Transactions

As the digital transformation continues to revolutionize different industries, cybersecurity has become a critical aspect that needs attention. The increasing use of online transactions such as e-commerce, e-banking, and e-healthcare calls for effective measures to ensure the confidentiality, integrity, and availability of information exchanged over the internet.

One of the critical challenges facing online transactions is the exchange of cryptographic keys between the communicating entities. Cryptographic keys are used to encrypt and decrypt messages, and their exchange needs to be secure to avoid interception by unauthorized parties. Certificateless Authenticated Key Agreement (CLAKA) is a cryptographic protocol used to establish a secure session key between two entities without the need for digital certificates.

An efficient Certificateless Authenticated Key Agreement scheme enhances security in online transactions by ensuring the confidentiality, integrity, and efficiency of the cryptographic key exchange. The scheme involves two entities: a key generation center (KGC) and a user. The KGC generates the master secret and public parameters, while the user generates the private key and public key.

The authentication process begins when the user sends a request to the KGC to generate a session key. The KGC responds by sending a challenge message, which the user signs with its private key and sends back to the KGC. The KGC verifies the user`s signature using the user`s public key and generates the session key. The KGC sends the session key to the user, encrypted with the user`s public key, and the user decrypts the session key using its private key.

One of the main advantages of CLAKA is that it eliminates the need for digital certificates, which can be costly and time-consuming to manage. CLAKA also provides a higher level of security than traditional key agreement protocols as it uses the elliptic curve cryptography algorithm, which is resistant to attacks such as the brute force attack.

In conclusion, the adoption of an efficient certificateless authenticated key agreement scheme is crucial in enhancing security in online transactions. The CLAKA protocol provides a secure and efficient method of exchanging cryptographic keys without the need for digital certificates. With the increasing use of online transactions, it is essential to invest in robust security measures to prevent unauthorized access and protect sensitive information.