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37 views

Is it secure to use ciphertext feedback with RC4?

Consider the following modification of RC4 to give some "ciphertext feedback" ...
24 views

Relationship between public key and private key [closed]

Relationship between public key and private key p = fffffffffffffffffffffffffffffffffffffffffffffffffffffffefffffc2f n = FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364140 ...
179 views

Does complicating a flawed algorithm make it secure?

It's a basic question I guess, but I don't know the answer and I don't think that anyone asked it. Suppose I built a system, it relies on MD5 for security, suddenly I read am article on how easy are ...
44 views

How is a group element converted into a key?

I've only just started research on cryptography so I apologize if this is a basic question or I'm getting terms confused. I'm researching braid group cryptography and currently looking at the ...
16 views

How do i password encrypt arbitrary string, JavaScript client-side [closed]

We need a JS library for client-side symmetric password encryption. Should be a simple password, protecting a data string. Preferrably AES symmetric type. Long explanation: I was looking into Veness ...
17 views

Vigenére Cipher with Numbers in PHP [closed]

How can i also encrypt/decrypt numbers using the Vigenére cipher? Code: ...
13 views

P2P Encryption on 512, [closed]

First of all TY I need to know if anyone knows if 512 could be configured for a P2P point. ONLY the 2 points, nothing else.
11 views

Advantages of the general digraph trust model over the strict hierarchical model

Are there any advantages of using reverse certificates and the general digraph trust model over the strict hierarchical trust model as described here: In the digraph model each CA can generate ...
73 views

Are all encryption tools made equal?

I'd like to encrypt work-related data backups stored on an external drive. The backups contain proprietary company information and trade secrets. My current backup program, Comodo Backup, allows me ...
31 views

4k views

Why can't I reverse a hash to a possible input?

I'm going to provide “proof” why a hash function can be reversed, and I hope you can tell my why I'm wrong So, a hash function can be implemented as a series of logic gates. All logic gates can be ...
3k views

Cryptanalysis to reverse engineer a hash?

I understand this may not be the best place to ask a question like this, but I believe that this community may be the best/only place I can ask such a question. I have inputs and outputs from an ...