https://github.com/hakandilek/keysmith

keysmith is a cross platform asymmetric cryptography showcase
https://github.com/hakandilek/keysmith

Last synced: 27 days ago
JSON representation

keysmith is a cross platform asymmetric cryptography showcase

• Host: GitHub
• URL: https://github.com/hakandilek/keysmith
• Owner: hakandilek
• License: other
• Created: 2013-04-28T17:23:16.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2015-09-10T11:11:08.000Z (about 9 years ago)
• Last Synced: 2023-03-12T17:01:44.465Z (over 1 year ago)
• Language: C#
• Homepage: http://hakandilek.github.io/keysmith/
• Size: 3.83 MB
• Stars: 2
• Watchers: 1
• Forks: 3
• Open Issues: 7
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

Awesome Lists containing this project

README

        
keysmith

========

keysmith is a cross-platform cryptography showcase with following components:

 * public-key store - Java REST service implementation developed using [dropwizard](https://github.com/codahale/dropwizard).

 * [Java Client Library](https://github.com/hakandilek/keysmith/tree/master/keysmith-client)

 * [C#/.net Client Library](https://github.com/hakandilek/keysmith/tree/master/dotnet-client)

 * [Objective-C/IOS Client Library](https://github.com/hakandilek/keysmith/tree/master/ios-client)

Keysmith introduces 3 schemes for encrypting/decrypting data:

 * Public Key Encryption

 * Secret Key (Asymmetric) Encryption

 * Hybrid Encryption combining two above

 

Public Key Encryption

----------

With public key encryption clients generate a key pair, and store the 

public key on the server. Another client encrypts a message retrieving the key 

from the server and puts this encrypted message on the server. First client

retrieves the encrypted message from the server and decrypts it using his own

private key.

With this method, message size is limited to the key size 

(keysize / 8 - padding to be exact).

![asymmetric implementation](https://raw.github.com/hakandilek/keysmith/master/asymmetric.jpg "asymmetric implementation")

Secret Key Encryption

----------

With secret key encryption model, client generates a secret key and stores it 

within the message. Other client receiving the message decrypts it using the 

enclosed secret key. There's absolutely no security.

Hybrid Encryption

----------

Hybrid implementation is a combination of the above schemes. First client 

generates a key pair and a secret key. While key from the key pair is stored on 

the server, secret key is encrypted with this public key and message is encrypted

with the secret key. Thus, the message send to the server contains encrypted 

secret key and the encrypted message. Other client receiving the message first 

decrypts the secret key with the private key, then decrypts the message with 

the secret key.

 

This method has a slight advantage over the public encryption scheme because 

there's no limitation on the message size and performing secret key encryption on 

the message has a slightly huge performance advantage. 

![hybrid implementation](https://raw.github.com/hakandilek/keysmith/master/hybrid.jpg "hybrid implementation")