Tagged Questions

A type of encryption where the same key is used to encrypt and decrypt the message.

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1answer
22 views

PHP MYCRYPT - RIJNDAEL_128 with Mcrypt CBC gives the different encryption string everytime

I am back again with a PHP+RIJNDAEl_128+CBC. I am successful in encryption and decryption to the raw string. But the only problem I am facing is I get the DIFFERENT ENCRYPTION string every time. ...
-1
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0answers
39 views

Why does this simple java encryption program not work? RESOLVED [closed]

EDIT: The code works now with no changes. Bizarre. I am currently working my way through Stanford's CS106A Programming Methodology class and have just passed a lesson during which the teacher ...
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1answer
20 views

Encrypting data symmetrically and asymmetrically

As far as I have learned so far, asymmetric encryption is too costly for long data. Additionally, from a technical perspective, it's not even possible to encrypt arbitrarily large portions of data ...
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1answer
17 views

What symmetric encryption algorithms implemented in both of c# and php do not requires fixed lenght of input data?

Currently I use AES and have a problem, if user choose to decode unencrypted file, my prog always ends up with exception, even when try catch placed and running out of debugger. public static byte[] ...
0
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1answer
83 views

RSA and AES encryption

I am looking at the feasibility for using Chrome apps for the front end of some applications I am working on. (As an aside, if anyone has any thoughts on this - put it in the comments) I would be ...
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0answers
26 views

No IV for one off symmetric file encryption [migrated]

My question is (hopefully, for somebody) a simple one; but my project is holding as I'm not sure. I read on SO that generating encryption keys without an IV is a bad idea, so is using a constant IV ...
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2answers
88 views

SQL Server symmetric key is lost, how to decrypt the data?

We are in a situation where symmetric key and certificates are deleted, Is there any way can we decrypt the data? We tried decrypting the data with same script which was used for creating the master ...
0
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1answer
271 views

AESManaged File Encryption and Decryption and prepending initiaization vector

I am trying to encrypt/decrypt bytes - I have done a lot of reading about the Key and IV for the AES algorithm using the AESManaged class in System.Security.Cryptography. I read James Johnson's ...
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2answers
50 views

Asynchronous vs. Synchronous Encryption Key and is SSL required for my app?

I'd like to secure the payload of a (local-notwork) TCP connection against attackers who snoop traffic. This payload only gets send in the direction from the client to the server. As my ...
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0answers
25 views

Using password salt as IV in password-based encryption

I need to write a simplified encryption API that can easily deal with symmetric encryption, either by using a random generated key or a password-derived key. The password generation is performed with ...
-3
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0answers
29 views

Encryption help needed, USD10,000 prize [closed]

If you're good at discrete math problems, then please help us find a weakness in our algo. You could earn a nice chunk of change if you can crack it, but even just finding significant weaknesses would ...
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3answers
45 views

Base64 encrypted Allowed Characters

I'm using Base64 encryption for encryping user id field in Java. String abc = new String(Base64.encodeBase64("Actualuseridfield")); I want to know whether the string abc above will contain the ...
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0answers
23 views

Implementation of PhoneStateListener

I need to implement the following things in my app: 1.) To listen for phone calls - means when call arrives, my app should pause in between and go to background, and the Calling screen appears. Once ...
0
votes
1answer
18 views

PKCS#11 Soft Token for supporting symmetric function

For testing my codes, I need a PKCS#11 soft token which support symmetric functions like AES, DES, ... Which PKCS#11 soft token support at least one symmetric function?
0
votes
1answer
71 views

AES ciphertext pass as parameter C++ cryptopp

I am trying to write 2 different functions to encrypt and decrypt the data using AES in cryptopp. I want to pass the ciphertext as a parameter to the decryption function. However on the decryption ...

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