This tag is used for code review questions relating to cryptographic topics such as encryption/decryption and hashing.
4
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0answers
2k views
AES CTR mode using pycrypto
I've implemented CTR mode by myself (only decryption for now), using only AES built-in functions from pycrypto. It means that I'm not supposed to use mode=AES.MODE_CTR. However, I know that using ...
3
votes
0answers
4 views
Encrypting a binary stream with RSA + AES in counter mode
I'm writing a little script that encrypts a file using the user's SSH identity.
I read the RSA private key from ~/.ssh/id_rsa (default)
Use the private key to encrypt a random 32 byte symmetric key ...
3
votes
0answers
33 views
Mifare AES-128 symmetric key diversification
I have implemented a symmetric (AES 128-bit) key diversification algorithm for Java following the NXP Notes. It works as expected but am not the best Java programmer around, I guess I have done quite ...
3
votes
0answers
76 views
MD5 hash comparison for two folders
Using this page for a starting point into comparing MD5 hash values from files in two different folders, I've put something together that outputs either Copied if ...
2
votes
0answers
174 views
Simple encryption with PHP 5.5
I want to do simple encryption using PHP 5.5. By “simple” I mean I want to use native PHP functions. I have created this code that works, can it be improved? It's to encrypt/decrypt strings and binary ...
2
votes
0answers
339 views
Encrypt texts, with saved password using pycrypto
I have the code bellow, which is supposed to be used inside a larger program.
Please see notes about the requirements below the code.
...
2
votes
0answers
110 views
Streamed encrypt then MAC construction
I've been porting python Keyczar to work under 2to3 conversion (Github). I wanted to consolidate its streaming AES encrypt/decrypt backend interface with its string decrypt/encrypt. So I wrote a new ...
1
vote
0answers
34 views
Big Integers and parallel execution with OpenMP
This is part of an implementation of Rabin-Williams signatures as described by Bernstein in Section 6 of "RSA signatures and Rabin–Williams signatures: the state of the art" using Tweaked Roots.
The ...
1
vote
0answers
132 views
Web API 2 - JWT with X509 certificate
I got my JWT generation working with X509 and wanted to ask if you would recommend any changes in respect to:
Signing certificate storing / handling.
Publishing for anonymous access public key
...
1
vote
0answers
162 views
AES encryption class
I am new to encryption and recently wanted to learn more about it. I researched how to do AES Encryption in java and assembled my own Java AES encryption class. I don't know if there are any major ...
1
vote
0answers
35 views
AES256 + HMACSHA256 'secretbox'
I aim to create a few primitives for creating AES256-then-HMACSHA256 secured session state through cookies.
What I've considered:
HMAC instead of plain sha to avoid hash extension attacks
input ...
1
vote
0answers
137 views
Is this implementation of the ECIES cipher correct?
I downloaded source code of cryptosms and implemented the ECIES cipher in my work for Java mobile.
I doubt validity of this step (full code of my method is below):
...
0
votes
0answers
187 views
Markov Encryption API in Python 2.5
The module in question provides classes used to execute Markov encryption and decryption on arrays of bytes. ME was inspired by a combination of Markov chains with the puzzle of Sudoku. This version ...
