Hashing (OCR A-Level Computer Science): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the output of a hash function called?
What is the output of a hash function called?
Hash value or hash code
What is a key property of hash functions regarding the same input?
What is a key property of hash functions regarding the same input?
Always produces the same hash output
How many bits does SHA-256 produce in its hash output?
How many bits does SHA-256 produce in its hash output?
256 bits
Why is hashing described as a one-way function?
Why is hashing described as a one-way function?
Cannot derive original data from hash
What does a tiny change in the original data produce in the hash?
What does a tiny change in the original data produce in the hash?
A completely different hash
What is stored in a system for password verification instead of the actual password?
What is stored in a system for password verification instead of the actual password?
Hash of the password
What is a collision in hashing?
What is a collision in hashing?
Two different inputs produce same hash
How many bits does MD5 produce and what is its current status?
How many bits does MD5 produce and what is its current status?
128 bits, weak
What time complexity do hash tables provide for data retrieval?
What time complexity do hash tables provide for data retrieval?
Constant time complexity
What does it indicate if recalculated and original hashes don't match for a downloaded file?
What does it indicate if recalculated and original hashes don't match for a downloaded file?
Potential corruption or tampering
What makes simple hashing vulnerable without additional security measures?
What makes simple hashing vulnerable without additional security measures?
Brute force or dictionary attacks
Why is SHA-256 preferred over SHA-1 for security-sensitive applications?
Why is SHA-256 preferred over SHA-1 for security-sensitive applications?
SHA-1 has collision vulnerabilities