# All Questions

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### PBKDF2 without salt on 16 digit password

How secure would be to use PBKDF2 without salt (or with the same salt for all) with a 16 digits passwords that are unique and randomly generated (there can't be two identical)? Assuming an adversary ...
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### Calculating $d$ in RSA?

I've looked in many places including here and can't get quite the answer... So I thought I'd post a question. I can't grasp how $d$ is calculated. Obviously the problem is that knowing $e$ and $n$ ...
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### AES Key Generation based on database guid

I am developing a .NET application spanning multiple servers who should all be able to decrypt data stored in a SQL database. My database is multi-company where each company has its own GUID. since ...
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### Questions about SSL3 POODLE Bites

I have read some articles or books (e.g., “Bulletproof SSL and TLS”) about POODLE, but they still don't answer my questions – which are: From https://www.openssl.org/~bodo/ssl-poodle.pdf, ...
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### SPDZ protocol: how expensive is it to generate the multiplicative triples?

I am currently reading the full version of the SPDZ protocol. I understand that the online phase does multiplication with computational and communication complexity $O(n)$ by using Beaver's ...
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### Does Kasisky test for Vigenère cyphers assumption always hold?

In the notes from which I'm studying I read about Kasisky test: "Key observation: Two identical segments of $l ≤ L$ plaintext letters, will be encrypted to the same $l ≤ L$ ciphertext letters." ...
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### Clarification on the origin of 01 in this oracle padding attack?

I have found what I believe to be a straightforward explanation of the oracle padding attack here: http://robertheaton.com/2013/07/29/padding-oracle-attack/ I am however getting confused by something ...
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### Will the non-colluding servers communicate in IT-PIR schemes ?

The current literature around Information Theoretic Private Information Retrieval (IT-PIR) schemes assume the existence of multiple copies of the database distributed across non-colluding servers. ...