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In Blockwise On-line Encryption, encryption and decryption
return an output block as soon as the next input block is received.
In this paper, we introduce Authenticated Streamwise On-line
Encryption (ASOE), which operates on plaintexts and ciphertexts as
streams of arbitrary length (as opposed to fixed-sized blocks),
and thus significantly reduces message expansion and end-to-end
latency. Also, ASOE provides data authenticity as an option.
ASOE can therefore be used to efficiently secure
resource-constrained communications with real-time requirements such
as those in the electric power grid and wireless sensor networks.
We investigate and formalize ASOE's strongest achievable notion of security, and present a construction that is secure under that notion. An instantiation of our construction incurs zero end-to-end latency due to buffering and only 48 bytes of message expansion, regardless of the plaintext-size.
Bibliographic citation for this report: [plain text] [BIB] [BibTeX] [Refer]
Or copy and paste:
Patrick P. Tsang, Rouslan V. Solomakhin, and Sean W. Smith, "Authenticated Streamwise On-line Encryption." Dartmouth Computer Science Technical Report TR2009-640, March 2009.
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