Hey folks,(adsbygoogle = window.adsbygoogle || []).push({});

I have a bit of a brain teaser I'm stumped on at the moment. I have an encrypted message I could use some help decrypting. The encryption algorithm is as follows: Read the plain text into 16 character blocks. Each such block will be converted to a BigInteger by treating it as a 16 digit number in a base 128 number system. (The ASCII code of a character is 7 bits.) Incomplete blocks should be padded up by blanks at the end. This will produce a sequence of

BigIntegers representing the block-by-block encoding of the plain text input. Then those BigIntegers will be encrypted by multiplying each by a BigInteger (the Key) that is supposed to be secret.

This is very straight forward and easy to implement, but decrypting a secret message without the key is my current goal. If you are up for the challenge give this a shot and keep me posted on the results.

3722413721597234206507650923983285120166901260478730869

6736638976638615758622997116823310767096086080786804802

1836714918194979944137126492369500940937915708565964527

6200450286565486196074388059858603808398976724101400303

5750288060945256026702605821838960267473373177639409286

5832816355098275829201875849607446439291341167953035910

5663374800875719056491076033940220393576824222551138258

6371670599832070641542158304833756560944630944109070063

6200450286568057203187204796088787244633533579439898834

Again, this would be divided by the secret key, and then the plain text could be derived by modding and dividing by 128 and converting into ascii.

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Encrypted Message Help

Loading...

Similar Threads - Encrypted Message Help | Date |
---|---|

Netherlands Message to President Trump | Jan 24, 2017 |

News Backdoors into encryption technology, "That's just stupid." | Apr 30, 2015 |

Do you use encryption? According to NSA = Potential Terrorist | Jul 31, 2013 |

Encryption key and encrypted text | Jul 20, 2011 |

Can anyone figure out this encryption? | Dec 5, 2005 |

**Physics Forums - The Fusion of Science and Community**