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Cryptography Stack Exchange

Questions tagged [semantic-security]

produces ciphertext that, by itself, does not reveal information about the original message besides its length

A semantically secure encryption scheme produces ciphertext that, by itself, does not reveal information about the original message besides its length.

112 questions
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Why is encrypting a key under itself dangerous?

I'm currently self-studying to try and understand more about cryptography for work. I'm on question 2.16 on A Graduate Course in Applied Cryptography . For part a), we're given a cipher $E$ that's semantically secure and asked to create $\hat{E}$…
AeonNeo
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Can semantic security protect against key recovery attack?

Do I need to pay special attention to key recovery attack while focusing on semantic security? The book "A Graduate Course in Applied Cryptography" by Dan Boneh and Victor Shoup doesn't focus on key recovery attack while talking about semantic…
drawlone
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Semantic security and indistinguishability

I have two frames f1 and f2 that are each composed of several elements noted e. Note that, an element can fall into one of those two categories: an identifier or a counter. What I want is to find a property that verifies indistinguishability of…
Guillaume
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IPS systems and AES Encrypted data

I was wondering how "IPS" systems process and react to the AES encrypted data than the DES
Terri Croft
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