Linked Questions

3 votes
2 answers
450 views

Idea for user/pass hashing to prevent rainbow tables, would it work?

I'm very new to cryptography (and security in general, for that matter), but I had an idea that I'm sure is very flawed, but is worth asking. If a computer user, online account, etc, needs to verify a ...
tkbx's user avatar
  • 181
3 votes
2 answers
715 views

Hash based code obfuscation?

The code if(str1 == "abc") {} can be converted to if(hash(str1) == 0x8732e) {} // assume hash("abc") == 0x8732e to ...
Infinite's user avatar
  • 133
5 votes
1 answer
686 views

Why don't we use bcrypt and scrypt together?

Everyone is comparing bcrypt to scrypt. Bcrypt is proven, lots of cryptoanalysis and no vulnerabilities so far, but uses very low memory. While scrypt uses a lot of memory, but it's too early in its ...
Zoltan Zaikosz's user avatar
2 votes
2 answers
968 views

Is it worth hiding an AES encrypted text string in a PNG image for better security?

I need advice as to whether it is worth the extra "security" and processing of an AES encrypted text string to be hidden in a PNG image as opposed to an AES encrypted text string to be saved in a read-...
DaNCh's user avatar
  • 23
2 votes
1 answer
622 views

Extension of a password hashing algorithm using Fibonacci

I am right now taking a class named Applied Cryptography and our final project is to create a password hashing method using at least one existing algorithm and then add additional steps to make it ...
Yatiac's user avatar
  • 121
4 votes
1 answer
358 views

salting with password hash to improve security?

Would something like the following improve security (against rainbow attacks, not brute force)? Assume that $P$ is a user-chosen password, and the objective is to obtain a hash $H$ for password ...
nonchip's user avatar
  • 153
0 votes
1 answer
285 views

Capital passphrases with rainbow tables?

I'm currently trying to learn how rainbow tables work for a personal project of mine, but I am a little bit confused on how passphrases can be found. Here are the steps that seem do this, from the ...
DecanalGossypine27's user avatar
3 votes
1 answer
154 views

Can the salting function complexity improve the hash robustness?

I'm quite novice in security, and all examples I saw seem to salt the password by concatenating it, or by applying a simple binary OR or XOR. So the hash is based on "salt + password", "salt | ...
Xavier Portebois's user avatar
2 votes
1 answer
145 views

Tips on conceiving safe software messaging platform

I have a personal project in mind in which I plan to use cryptography in order to let the users be confident in the fact that, even if all data get's stolen, it would be virtually impossible to crack ...
Berzemus's user avatar
  • 175
1 vote
1 answer
122 views

How to take SHA-1 safely for my particular case?

Let me ask about my toy passwords generator program X5 which I want to improve. X5 uses a secret key and a public key to generate a password.Where any public key is supposed to be known to hackers in ...
seven_swodniw's user avatar
0 votes
1 answer
57 views

Is there a crypto function that would take 1 second to run?

Short version of the question: what if we encrypt or decrypt by running SHA-256 one million times repeatedly, beginning with the initial "phrase" or "object", so that the operation ...
nonopolarity's user avatar

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