====== Cipher Block ======

The Cipher Block lets you encrypt and decrypt messages using an innovative <del>ripped off from OpenEnder</del> method - item stacks! Your unique items will create the key used for encryption.

===== Recipe =====

**NOTE:** The stone bricks can be any type of stone bricks.

{{ :wiki:computronics:cipherblock_recipe.png |}}

===== Usage (Computer API) =====

==== Setting the key ====

The key is derived from the six item stacks in the Cipher Block's inventory. Remember that the item stacks need to be identical every time you want to encrypt/decrypt a message with the same key.

==== ComputerCraft/OpenComputers ====

^ Command ^ Description ^ Usage ^
| encrypt(plaintext) | Encrypts a plaintext message. | Returns a base64-encoded, encrypted message. |
| decrypt(encrypted_message) | Decrypts a base64-encoded, encrypted message. | Returns the original plaintext message. |

==== NedoComputers ====

^ Address ^ Read ^ Write ^
| 0x00, 0x02 ... 0x1E | 32 bytes (16 words) of memory. | 32 bytes (16 words) of memory. | 
| 0x20 | 1 on error, 0 on success | 1 - encrypt the 32 bytes of memory, 2 - decrypt the 32 bytes of memory |

===== Usage (RedLogic/Project: Red) =====

Send a bundled cable signal on the side marked in red - the encrypted data will come out on the side marked in blue. To decrypt, repeat the same process - send the encrypted data on the side marked in red, get the decrypted data on the side marked in blue.