Download Dynamic Secrets in Communication Security by Sheng Xiao, Weibo Gong, Don Towsley (auth.) PDF
By Sheng Xiao, Weibo Gong, Don Towsley (auth.)
Dynamic secrets and techniques are continuously generated and up-to-date from messages exchanged among conversation clients. whilst dynamic secrets and techniques are used as a supplement to present safe communique platforms, a stolen key or password might be speedy and instantly reverted to its mystery prestige with out disrupting verbal exchange. "Dynamic secrets and techniques in verbal exchange defense" provides distinctive safety houses and alertness reviews for this know-how. Password robbery and key robbery now not pose severe defense threats whilst events usually use dynamic secrets and techniques. This publication additionally illustrates dynamic mystery established protection scheme promises impersonation assaults are detected no matter if an adversary steals a user’s password or their secret is misplaced. Practitioners and researchers operating in community safeguard or instant communications will locate this e-book essential reference. "Dynamic secrets and techniques in verbal exchange protection" can be a priceless secondary textual content for advanced-level scholars in laptop technological know-how and electric engineering.
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Sample text
3). 2 Dynamic Secrets in the Wireless LAN Link Layer 41 Suppose k1 and k2 are two key values such that k2 = k1 ⊕ s(t). The adversary maintains a short, error-free eavesdropping session and deduces s(t) from the eavesdropped data frames. Suppose the same plaintext x is encrypted by both k1 and k2 . This situation can occur in practice such as when x represents a repetitive control command. The corresponding ciphertexts c1 and c2 will be c1 = ek1 (x) c2 = ek2 (x) = ek1 ⊕s(t) (x). 5) Because the adversary can decrypt x without knowing either k1 or k2 ds(t) (c1 ⊕ c2 ) = ds(t) (es(t) (x)) = x.
Advances in cryptographic research can also uncover new weak keys. In a practical implementation, the compatibility between the updated key and the encryption and decryption algorithms used in the wireless LAN communications needs to be considered. Therefore we use Algorithm 4 for dynamic key updates. The algorithm first stores the potential key update value in a variable ktmp and test if ktmp is a weak key for cryptographic algorithms and protocols based on k(t). If ktmp coincides with a known weak key value, the algorithm would skip a key update.
This time Bob successfully receives m 2 and properly acknowledges it. Alice receives the acknowledgment frame for m 2 and sends m 3 . Bob receives the first transmission of m 3 . However, Bob’s acknowledgment frame for m 3 is corrupted by wireless randomness. Alice could not confirm the delivery of m 3 . Therefore Alice resends m 3 after a timeout. Once Alice receives the corresponding acknowledgment frame of m 3 , she then sends m 4 . Frames m 4 and m 5 are delivered without retransmissions. Their acknowledgment frames also arrive Alice without problem.