Document Type
Technical Report
Publication Date
3-28-2009
Technical Report Number
TR2009-640
Abstract
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.
Dartmouth Digital Commons Citation
Tsang, Patrick P.; Solomakhin, Rouslan V.; and Smith, Sean W., "Authenticated Streamwise On-line Encryption" (2009). Computer Science Technical Report TR2009-640. https://digitalcommons.dartmouth.edu/cs_tr/322