Secure communication in network environment is primary requirement to access remote resources in a controlled and efficient way. For validation and authentication in e-banking and e-commerce transactions, digital signatures using public key cryptography is extensively employed. To maintain confidentiality, Digital Envelope, which is the combination of the encrypted message and signature with the encrypted symmetric key, is also used. This research paper has proposed to develop a hybrid technique using Symmetric & Asymmetric key cryptography. It will also include Message authentication code to maintain integrity of message. Therefore, proposed model will not only help to maintain confidentiality and authentication of message and user but integrity of data too. Java technology has been proposed to validate the performance of proposed model in context of message length, key length, cipher text length and computational time for encryption and decryption.

Secure communication in network environment is primary requirement to access remote resources in a controlled and efficient way. For validation and authentication in e-banking and ecommerce transactions, digital signatures using public key cryptography is extensively employed. To maintain confidentiality, Digital Envelope, which is the combination of the encrypted message and signature with the encrypted symmetric key, is also used. This research paper has proposed to develop a hybrid technique using Symmetric & Asymmetric key cryptography. It will also include Message authentication code to maintain integrity of message. Therefore, proposed model will not only help to maintain confidentiality and authentication of message and user but integrity of data too. Java technology has been proposed to validate the performance of proposed model in context of message length, key length, cipher text length and computational time for encryption and decryption.

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