אמרת

What is the primary difference between SHA-1 and SHA-256/384/512?

1

שאלה #156075

		SHA-1 is faster than the other versions
		SHA-1 produces longer hash values
		SHA-1 uses a different algorithm than the other versions
		SHA-256/384/512 provide greater security with longer hash values

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Shachar Adam 0 נקודות · לפני חודשיים

מוניטין: 126

SHA-1: It produces a 160-bit hash value and is considered less secure due to vulnerabilities discovered in its design (e.g., collision attacks). As a result, its use is generally discouraged for security-critical applications. SHA-256/384/512: These are part of the SHA-2 family and produce 256-bit, 384-bit, and 512-bit hash values, respectively. They offer greater security because their longer hash lengths make them more resistant to attacks like collisions (where two different inputs produce the same hash).

What is the first step in the SHA-512 algorithm?

1

שאלה #156076

		Append length
		Append padding bits
		Process message in 1024-bit blocks
		Initialize hash buffer

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What is the size of the hash buffer initialized in the SHA-512 algorithm?

1

שאלה #156077

		128 bits
		256 bits
		1024 bits
		512 bits (8 x 64-bit registers)

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How many rounds are performed in the heart module (F) of SHA-512?

1

שאלה #156078

		40 rounds
		64 rounds
		80 rounds
		128 rounds

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Which option is used in SSL for combining MAC and encryption?

1

שאלה #156079

		MAC-then-Encrypt
		Encrypt-then-MAC
		Encrypt-and-MAC
		None of the above

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Which option is employed by IPsec for combining MAC and encryption?

1

שאלה #156080

		MAC-then-Encrypt
		Encrypt-then-MAC
		Encrypt-and-MAC
		None of the above

מיין לפי

Which protocol uses the Encrypt-and-MAC approach?

1

שאלה #156081

		SSL
		IPsec
		SSH
		TLS

נערך לפני 4 חודשים

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Which of the following is NOT an application of asymmetric cryptography?

1

שאלה #156082

		Session set up
		Encrypting file systems
		Non-interactive applications
		Symmetric key exchange

נערך לפני 4 חודשים

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What is key escrow in the context of asymmetric cryptography?

1

שאלה #156083

		A method for data recovery where a third party holds the keys
		An approach for securely transmitting keys
		A protocol for session setup
		A technique for generating random keys

מיין לפי

In what scenario is asymmetric cryptography particularly useful?

1

שאלה #156084

		Sending emails (non-interactive applications)
		Encrypting large amounts of data
		Performing high-speed encryption
		Establishing a secure Wi-Fi connection

נערך לפני 4 חודשים

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Discuss, Learn and be Happy דיון בשאלות

What is the primary difference between SHA-1 and SHA-256/384/512?

What is the first step in the SHA-512 algorithm?

What is the size of the hash buffer initialized in the SHA-512 algorithm?

How many rounds are performed in the heart module (F) of SHA-512?

Which option is used in SSL for combining MAC and encryption?

Which option is employed by IPsec for combining MAC and encryption?

Which protocol uses the Encrypt-and-MAC approach?

Which of the following is NOT an application of asymmetric cryptography?

What is key escrow in the context of asymmetric cryptography?

In what scenario is asymmetric cryptography particularly useful?

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