Reference no: EM131480604

Consider the following threats to Web security and describe how each is countered by a particular feature of TLS, if it is.

1. (a) Brute-Force Cryptanalytic Attack: An exhaustive search of the key space for a conventional encryption algorithm.
2. (b) Known-Plaintext Dictionary Attack: Many messages will contain predictable plain- text, such as the HTTP GET command. An attacker constructs a dictionary containing every possible encryption of the known-plaintext message. When an encrypted message is intercepted, the attacker takes the portion containing the encrypted known plaintext and looks up the ciphertext in the dictionary. The ciphertext should match against an entry that was encrypted with the same se- cret key. If there are several matches, each of these can be tried against the full ciphertext to determine the right one. This attack is especially effective against small key sizes (e.g., 40-bit keys).
3. (c) Replay Attack: Earlier SSL handshake messages are replayed.
4. (d) Man-in-the-middle attack: An attacker interposes during key exchange, acting as the client to the server and as the server to the client.
5. 5
6. (e) Password sniffing: Passwords in HTTP or other application traffic are eaves- dropped.
7. (f) IP spoofing.
8. (g) IP Hijacking: An active, authenticated connection between two hosts is disrupted and the attacker takes the place of one of the hosts.
9. (h) SYN Flooding.