Thread: text-based rpg help

>>signed wrapping is undefined behavior and may or may not work the way you expect it to.
To echo Vicious: Wow, didn't know that.

Glad to learn something new

**EDIT**
Err, hmm... I was thinking that the novel would be the operating code, not just something appended at the end of the file

By the way, good grammar and an immersive plot will score extra points

Originally Posted by MMD_Lynx

heh...that's useful. that's kinda how i was gonna encrypt it. but i was gonna reverse it too
like "Hello, world!" would be "!dlrow ,olleH"

you could also use simple XOR encryption, and have the user create a password that will be mixed with another 128 bits to create the key... for example:

user password: PASSWORD
random key (128 chars): v5r6a48e78c618a697re81...
user password and key (key): PvA5SrS6WaO4R8De78c618a697re81...

when the program puts data into the database, you can use that key to encrypt it:

out<<data^key;

then when the user enters their password, you can extract it from the key to check if it's right... then if it is... do the same you did to encrypt it:

in>>data;
data=data^key;

the main problem with mixing the key and password is that when they want to change the password, you have to then decrypt and reencrypt everything in the file so their new password will still be valid... for example:

old password: PASSWORD
new password: ADMINISTRATOR
old key: PvA5SrS6WaO4R8De78c618a697re81...
new key: AcD1M8IeNrI6SaT1RtA8TrO6R54cvr5a64r861a...

in>>data
data=data^old key;
out<<data^new key;

this method is fairly secure, with the biggest security issue being having the password integrated with the key in that way. you may even consider not having the password integrated with the key at all, but stored somewhere else, also encrypted with a different key.

here's some code to get you started: http://www.cprogramming.com/cgi-bin/...ategory&CID=12