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mikeazo
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202 votes
Accepted

How much would it cost in U.S. dollars to brute-force a 256-bit key in a year?

2 votes

How to deduce enigma settings given a partial plaintext?

26 votes
Accepted

Why do we need special key-wrap algorithms?

4 votes

Is Blowfish strong enough for VPN encryption?

28 votes

Why is $H(k\mathbin\Vert x)$ not a secure MAC construction?

4 votes

Is it feasible to build an index of prime factors?

1 vote
Accepted

uniquely identify a symmetric key

13 votes
Accepted

AES in ECB mode weakness

5 votes

How exactly would someone crack a private key passphrase?

6 votes

If Bob steals Alice's private key, how exactly would he read her encrypted documents?

8 votes
Accepted

How does one scale encryption strength upwards from 256-bit?

14 votes

Google is using RC4, but isn't RC4 considered unsafe?

8 votes

What is the difference between a stream cipher and a one-time-pad?

11 votes
Accepted

Would the ability to efficiently find Discrete Logs have any impact on the security of RSA?

0 votes

How can I prevent a message replay with RSA?

6 votes

Could one construct a cipher that is secure for friendly parties to use but insecure for hostile parties?

1 vote
Accepted

Is a changing public truecrypt container secure?

3 votes

How do I construct a 256-bit hash function from 128-bit AES?

1 vote

ANSI X9.31: the purpose of the date/time vector in the PRNG?

13 votes
Accepted

What is the most practical fully homomorphic cryptosystem?

7 votes

Time Capsule cryptography?

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