Which of the following can be implemented with multiple bit strength?
A.
AES
B.
DES
C.
SHA-1
D.
MD5
E.
MD4
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Key words: MULTIPLE BIT STRENGTH
All hash listed in here used a fixed key size other than AES (a symmetric algorithm) which uses key sizes of 128, 192, or 256 bits. Therefore AES is the only one capable of providing MULTIPLE BIT STRENGTH
• AES (a symmetric algorithm) uses key sizes of 128, 192, or 256 bits.
• DES uses a 56-bit key
• SHA produces a 160-bit hash value.
• SHA-2 has several sizes: 224, 256, 334, and 512 bit. ( but it is not listed)
Message Digest Algorithm produces a 128-bit hash
• The MD4 digest length is 128 bits
Incorrect Answers:
B: The Data Encryption Standard (DES) has been used since the mid-1970s. It was the primary standard used in government and industry until it was replaced by AES. It’s based on a 56-bit key and has several modes that offer security and integrity.
C: The Secure Hash Algorithm (SHA) was designed to ensure the integrity of a message. SHA is a one-way hash that provides a hash value that can be used with an encryption protocol. This algorithm produces a 160-bit hash value. SHA-2 has several sizes: 224, 256, 334, and 512 bit.
D: The Message Digest Algorithm (MD) creates a hash value and uses a one-way hash. The hash value is used to help maintain integrity. There are several versions of MD; the most common are MD5, MD4, and MD2. MD5 is the newest version of the algorithm. It produces a 128-bit hash, but the algorithm is more complex than its predecessors and offers greater security.
E: The MD4 Message-Digest Algorithm is a cryptographic hash function developed by Ronald Rivest in 1990. The digest length is 128 bits
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