Secure e-mail protocols providing perfect forward secrecy

Hung–Min Sun

doi:10.1109/LCOMM.2005.01004

Secure e-mail protocols providing perfect forward secrecy

2005-01-01

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DOI：10.1109/LCOMM.2005.01004

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Electronic mail, e-mail in short, has been used to transfer various types of electronic data on internet. In order to deliver the e-mail from the sender to the receiver both efficiently and securely, the e-mail system usually employs both conventional and public key cryptographic systems. The basic protection in an e-mail system is to encrypt the bulk mail using a conventional cryptosystem with a short-term key and to protect the short-term key using a public-key cryptosystem, with the receiver's public key. However this protection cannot provide, perfect forward secrecy because once the receiver's secret key is disclosed, all previous used short-term keys will also be opened and hence all previous e-mails will be learned. Two new e-mail protocols providing perfect forward secrecy are proposed,in this paper.

Keyword:

email, network security

encryption

perfect forward secrecy

Secure e-mail protocols providing perfect forward secrecy

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