Cosmos: Add Triple DES cryptographic Algorithm

[debck]

This is a(n):

• [x] New algorithm
• [ ] Update to an existing algorithm
• [ ] Error
• [ ] Proposal to the Repository

Details:

The Triple DES algo is a symmetric key block cipher which uses the DES cipher algorithm for encryption and decryption of code

[abdouskamel]

If you know how to implement it, we will be glad to receive your contribution.

[sahnib]

I would like to work on this issue. As of now, I believe there is no implementation of DES algorithm as well in the library. I propose to start working on DES algorithm and then using the same for triple DES algorithm.

Any pointers on how to start are appreciated.

[abdouskamel]

You can write an implementation of DES in any language that you want, and add it to our cryptography section by creating a new folder called, for example, _des_cipher_. That would be a helpful contribution since, even thought DES isn't used nowadays, it's still an interesting cipher algorithm for people studying cryptography, and it is the base of Triple DES which is still in use.

[sahnib]

Awesome, I will start working on this.

[tbhaxor]

coders may take help from https://gist.github.com/eigenein/1275094