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Dec 27, 2022
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淩塵，給我站住，估計是沒有人有這https://www.vcesoft.com/212-81-pdf.html樣的癖好吧，接著，大青蠏快速鉆入龐大的戰艦底下，現在這三個是什麽鬼？
下載Certified Encryption Specialist考試題庫
NEW QUESTION 46
Which of the following is not a key size used by AES?
- A. 128 bits
- B. 256 bits
- C. 512 b
- D. 192 bits
Answer: C
Explanation:
512 bits
https://en.wikipedia.org/wiki/Advanced_Encryption_Standard
AES is a subset of the Rijndael block cipher developed by two Belgian cryptographers, Vincent Rijmen and Joan Daemen, who submitted a proposal to NIST during the AES selection process. Rijndael is a family of ciphers with different key and block sizes. For AES, NIST selected three members of the Rijndael family, each with a block size of 128 bits, but three different key lengths: 128, 192 and 256 bits.
NEW QUESTION 47
The time and effort required to break a security measure.
- A. Payload
- B. Session Key
- C. Non-repudiation
- D. Work factor
Answer: D
Explanation:
Work factor
Work factor - the time and effort required to break a security measure.
Incorrect answers:
Non-repudiation - involves associating actions or changes with a unique individual.
Session Key - is a single-use symmetric key used for encrypting all messages in one communication session. A closely related term is content encryption key (CEK), traffic encryption key (TEK), or multicast key which refers to any key used for encrypting messages, contrary to other uses like encrypting other keys (key encryption key (KEK) or key wrapping key).
Payload - is the part of transmitted data that is the actual intended message. Headers and metadata are sent only to enable payload delivery.
NEW QUESTION 48
Hash. Created by Ronald Rivest. Replaced MD4. 128 bit output size, 512 bit block size, 32 bit word size, 64 rounds. Infamously compromised by Flame malware in 2012.
- A. SHA-1
- B. MD5
- C. Keccak
- D. TIGER
Answer: B
Explanation:
MD5
https://en.wikipedia.org/wiki/MD5
The MD5 message-digest algorithm is a widely used hash function producing a 128-bit hash value. Although MD5 was initially designed to be used as a cryptographic hash function, it has been found to suffer from extensive vulnerabilities. It can still be used as a checksum to verify data integrity, but only against unintentional corruption. It remains suitable for other non-cryptographic purposes, for example for determining the partition for a particular key in a partitioned database.
MD5 was designed by Ronald Rivest in 1991 to replace an earlier hash function MD4, and was specified in 1992 as RFC 1321 Incorrect answers:
TIGER - hash. Created by Ross Anderson and Eli Baham. 192/160/128 bit output size, 512 bit block size, 53 bit word size, 24 rounds.
SHA-1 - Secure Hashing Algorithm. Designed by NSA. 160 bit output size, 512 bit block size, 40 bit word size, 80 rounds.
Keccak - SHA-3 (Secure Hash Algorithm 3) is the latest member of the Secure Hash Algorithm family of standards, released by NIST on August 5, 2015. SHA-3 is a subset of the broader cryptographic primitive family Keccak, designed by Guido Bertoni, Joan Daemen, Michael Peeters, and Gilles Van Assche, building upon RadioGatun.
NEW QUESTION 49
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