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Questions tagged [length-extension]

A length extension attack on a hash or message authentication code function, which allows extra information to be added to the input message without changing the output value.

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Is it possible to prevent length extension attacks

Is it possible to prevent length extension attacks without using any other hash algorithm than SHA-1?
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Is there a proof-of-work scheme vulnerable to length extension attack?

I wonder is there an example of proof of work scheme that uses a hash function and requires the hash function to be immune to length extension attack? I mean the scheme, that becomes easy to solve if ...
CaptainRR's user avatar
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Backwards Length Extension Attack

Can SHA 256 be modified to make it vulnerable to length extension attack both by appending text to the front and adding text to the end?
thecat's user avatar
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How the Baretto Naehrig rules for computing a sextic extension having the exact same order as the prime curve were computed?

For example, EIP197, I have $Y^2 = X^3 + 3$ having order $q$ equal to 21888242871839275222246405745257275088548364400416034343698204186575808495617 It’s the ...
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