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NEW QUESTION: 1
A. Option A
B. Option C
C. Option D
D. Option B
Answer: B
Explanation:
SQL Injection Prevention, Defense Option 1: Prepared Statements (Parameterized Queries) The use of prepared statements (aka parameterized queries) is how all developers should first be taught how to write database queries. They are simple to write, and easier to understand than dynamic queries. Parameterized queries force the developer to first define all the SQL code, and then pass in each parameter to the query later. This coding style allows the database to distinguish between code and data, regardless of what user input is supplied.
Prepared statements ensure that an attacker is not able to change the intent of a query, even if SQL commands are inserted by an attacker.
Reference: SQL Injection Prevention Cheat Sheet
NEW QUESTION: 2
다음 중 어느 것을 구현할 때 개인 및 공개 암호화 키를 사용하는 것이 중요합니까?
A. Diffie-Hellman 알고리즘
B. 메시지 다이제스트 5 (ND5)
C. SSL (Secure Sockets Layer)
D. AES (고급 암호화 표준)
Answer: C
NEW QUESTION: 3
What are four features of WPA? (Choose four.)
A. authenticated key management using 802.1X
B. unicast and broadcast key management
C. requires AES-CCMP
D. a message integrity check protocol to prevent forgeries
E. a larger initialization vector, increased to 48 bits
F. support for a key caching mechanism
Answer: A,B,D,E
Explanation:
Explanation/Reference:
Explanation:
TKIP and the related WPA standard implement three new security features to address security problems encountered in WEP protected networks. First, TKIP implements a key mixing function that combines the secret root key with the initialization vector before passing it to the RC4 initialization. WEP, in comparison, merely concatenated the initialization vector to the root key, and passed this value to the RC4 routine. This permitted the vast majority of the RC4 based WEP related key attacks. Second, WPA implements a sequence counter to protect against replay attacks. Packets received out of order will be rejected by the access point. Finally, TKIP implements a 64-bit Message Integrity Check (MIC).
To be able to run on legacy WEP hardware with minor upgrades, TKIP uses RC4 as its cipher. TKIP also provides a rekeying mechanism. TKIP ensures that every data packet is sent with a unique encryption key.
Key mixing increases the complexity of decoding the keys by giving an attacker substantially less data that has been encrypted using any one key. WPA2 also implements a new message integrity code, MIC. The message integrity check prevents forged packets from being accepted. Under WEP it was possible to alter a packet whose content was known even if it had not been decrypted.
http://en.wikipedia.org/wiki/Temporal_Key_Integrity_Protocol
http://documentation.netgear.com/reference/fra/wireless/WirelessNetworkingBasics-3-14.html
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