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Cryptography

Questions tagged [encryption]

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Encryption is the process of transforming plaintext using a cipher into ciphertext to make it unreadable to anyone except those possessing the key. Decryption is the process of transforming that ciphertext back into plaintext, using the key.

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File number is: EFTA00579440 You can look this up on the DOJ's official website. I initially thought it was a 2FA since it's 32 words but that doesn't explain the 4 word subject title. Also the word &...
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I am a layman in this field, so forgive me if this is not correct. The framework I thought of involves every website having two public keys and two private keys. Call public keys p and q, and the ...
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I have read article about getting the inverse element in the Galois field($2^8$) using subfields GF($2^4$) and GF($2^2$): GF ($2^2$) by adjoining a root W of $x^2+x+1$ over GF(2); GF ($2^4$) by ...
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Given a symmetric key block cipher with an $n-$bit blocklength with $n-$bit key (in ECB mode) let $N=2^n.$ Is there a known time memory tradeoff with $T=M=O(\sqrt{N})$? Edit: Thinking a little further,...
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Note: A live, public implementation of this reconstructed RSA challenge (with a solver leaderboard) is available here: https://rsa-challenge.rf.gd I am attempting to faithfully recreate the historical ...
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Respected mathematicians, I would like to know if there is any GitHub repository that accurately converts SHA-family algorithms into SAT problems. So far, I found the SAT encoder by Saeed Nejati to be ...
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In MariaDB it is possible to apply data-at-rest encryption using a plugin called file_key_management. This plugin uses a plain text file containing one ore more keys which are ids assigned like this (...
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Construct a public-key encryption scheme which is CPA secure but not circularly secure, relying only on the existence of public-key encryption schemes. This is a problem from my cryptography course ...
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I have been using lifted ElGamal for my binary choice encryption into an exponent $g^m$, where m=0 or m=1. After ciphertext aggregation and decryption I got a message as $g^{m1+m2+m3+...+mn}$ and I ...
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This question is purely to satisfy my curiosity - I'm not attempting to implement my own encryption, I'm just curious. Let's say Alice and Bob establish a communication channel, and the first thing ...
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I want to know what is the complexity of the lattice-reduction algorithm (used agains CKKS encryption algorithm) named Block Korkine-Zolotarev (BKZ) algorithm (Curtis et al., 2019)? ref: https://...
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I am engaged in the translation of encrypted files. I have several files encrypted in the same way. The files consist of two parts: 48 byte header example - ...
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Is there any respected mathematician who can correctly transform the double SHA proof-of-work (used in Bitcoin mining) into a satisfiability (SAT) problem, ensuring that the CNF conversion is done ...
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I'm working in an insurance company. Beyond meeting regulatory compliance requirements, is there really any need to enforce hsm in Azure Key Vault (premium tier). The risk of exposure seems ...
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I know that Sieve Algorithms are good attacks against CKKS Encryption Techniques. I want to know the exact expression of the complexity of the Sieve Algorithm attacks, according to Miklós Ajtai, Ravi ...
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