In this study I have compared the speeds of three basic encryption algorithms on audio files: RSA, PlayFair and Noble Prime encryption. This was a small research study in 2002 of Algorithms class.

The Algorithm

Download RSA audio encryption source from here.

Download Playfar audio encryption source from here.

Download Noble prime audio encryption source from here.

Sample audio file is here.

Sample Execution Results

              RSAWAVE Encryption

Command: RSAWAVE e 23 11 23 anna.wav anna2.wav

RSAWAVE    copyright by Chasan CHOUSE

bps  : 8

Mode : 1

Elapsed time: 2.8022

               RSAWAVE Decryption

Command: RSAWAVE d 23 11 23 anna2.wav anna3.wav

RSAWAVE    copyright by Chasan CHOUSE

bps  : 8

Mode : 1

Elapsed time: 2.8022

               PLAYWAVE   Encryption 

Command: PLAYWAVE e metalmoney anna.wav anna2.wav

PLAYWAVE    copyright by Chasan CHOUSE

bps  : 8

Mode : 1

Elapsed time: 0.2198

                PLAYWAVE   Decryption 

Command: PLAYWAVE d metalmoney anna2.wav anna3.wav

PLAYWAVE   copyright by Chasan CHOUSE

bps  : 8

Mode : 1

Elapsed time: 0.2198

                 EDWAVE   Encryption 

Command: edwave e anna.wav ann2.wav

EDWAVE    copyright by Chasan CHOUSE

bps  : 8

Mode : 1

 Selected Noble Prime: 2939

Elapsed time: 0.1648
 

                EDWAVE   Encryption  

Command: edwave d anna2.wav ann3.wav

EDWAVE    copyright by Chasan CHOUSE

bps  : 8

Mode : 1

Selected Noble Prime: 2939

Elapsed time: 0.1648

Conclusion

Table 1. shows the difference between RSA, PlayFair and Noble Prime encrypt/decrypt .

File Name :  anna.wav

Size           :  828.934 bytes

Play Time  : 18,794 seconds.

Mode         :  PCM  44100 Hz  8 bit Mono (Unsigned)

                                                           Table 1.

Findings:  

-         Edwave  : If the encrypted audio is listened, it can be seen that there is only noise.

-         Rsawave :  This algorithm is added 80 % noise in audio. Original sound is a little bit recognizable.

-         Playwave : This algorithm is added a little bit of noise. Almost everything is heard. Can't be used in audio encryption.

At the end we can say the fastest algorithm is Noble Prime Encryption.