Number Encryption Algorithm
Hi All
I need vb.net code to encrypt numbers to have a fixed length string of 5 characters
the following is the given data
[CODE]
Code:
Number >>> ASCII Values of string characters
==============================
3.5 >>> (0 0 96 64 0)
3.75 >>> (0 0 112 64 1)
4.4 >>> (205 204 140 64 0)
4.5 >>> (0 0 144 64 1)
4.7 >>> (102 102 150 64 1)
5 >>> (0 0 160 64 0)
5.75 >>> (0 0 184 64 1)
5.75 >>> (0 0 184 64 2)
6.05 >>> (154 153 193 64 1)
7 >>> (0 0 224 64 1)
7.2 >>> (102 102 230 64 0)
7.25 >>> (0 0 232 64 1)
7.5 >>> (0 0 240 64 1)
7.5 >>> (0 0 240 64 2)
7.75 >>> (0 0 248 64 0)
7.85 >>> (51 51 251 64 1)
8 >>> (0 0 0 65 0)
8.5 >>> (0 0 8 65 0)
8.5 >>> (0 0 8 65 0)
8.5 >>> (0 0 8 65 0)
8.6 >>> (154 153 9 65 0)
9 >>> (0 0 16 65 2)
9 >>> (0 0 16 65 1)
9 >>> (0 0 16 65 2)
9.2 >>> (51 51 19 65 1)
9.5 >>> (0 0 24 65 2)
9.5 >>> (0 0 24 65 0)
9.5 >>> (0 0 24 65 1)
9.5 >>> (0 0 24 65 0)
9.85 >>> (154 153 29 65 1)
10 >>> (0 0 32 65 5)
10 >>> (0 0 32 65 1)
10 >>> (0 0 32 65 2)
10 >>> (0 0 32 65 0)
10 >>> (0 0 32 65 2)
10.2 >>> (51 51 35 65 1)
10.25 >>> (0 0 36 65 2)
10.25 >>> (0 0 36 65 2)
10.5 >>> (0 0 40 65 1)
10.5 >>> (0 0 40 65 1)
10.5 >>> (0 0 40 65 0)
10.5 >>> (0 0 40 65 1)
10.75 >>> (0 0 44 65 1)
10.75 >>> (0 0 44 65 2)
11 >>> (0 0 48 65 0)
11 >>> (0 0 48 65 0)
11 >>> (0 0 48 65 2)
11.2 >>> (51 51 51 65 1)
11.5 >>> (0 0 56 65 2)
11.5 >>> (0 0 56 65 1)
11.5 >>> (0 0 56 65 1)
11.5 >>> (0 0 56 65 2)
11.5 >>> (0 0 56 65 1)
11.5 >>> (0 0 56 65 1)
11.5 >>> (0 0 56 65 3)
11.5 >>> (0 0 56 65 1)
12 >>> (0 0 64 65 0)
12 >>> (0 0 64 65 5)
12 >>> (0 0 64 65 1)
12 >>> (0 0 64 65 2)
12.25 >>> (0 0 68 65 0)
12.25 >>> (0 0 68 65 1)
12.3 >>> (205 204 68 65 1)
12.5 >>> (0 0 72 65 2)
13 >>> (0 0 80 65 2)
13 >>> (0 0 80 65 1)
13 >>> (0 0 80 65 2)
13.4 >>> (102 102 86 65 2)
13.5 >>> (0 0 88 65 1)
13.5 >>> (0 0 88 65 1)
13.5 >>> (0 0 88 65 0)
14 >>> (0 0 96 65 1)
14 >>> (0 0 96 65 0)
14 >>> (0 0 96 65 2)
14 >>> (0 0 96 65 2)
14 >>> (0 0 96 65 1)
14 >>> (0 0 96 65 1)
14 >>> (0 0 96 65 1)
14 >>> (0 0 96 65 1)
14 >>> (0 0 96 65 2)
14 >>> (0 0 96 65 1)
14 >>> (0 0 96 65 0)
14.25 >>> (0 0 100 65 3)
14.25 >>> (0 0 100 65 1)
14.5 >>> (0 0 104 65 2)
14.5 >>> (0 0 104 65 3)
14.5 >>> (0 0 104 65 1)
14.65 >>> (102 102 106 65 2)
15 >>> (0 0 112 65 1)
15 >>> (0 0 112 65 1)
15.5 >>> (0 0 120 65 6)
15.5 >>> (0 0 120 65 2)
15.5 >>> (0 0 120 65 1)
15.5 >>> (0 0 120 65 2)
15.75 >>> (0 0 124 65 3)
16 >>> (0 0 128 65 2)
16 >>> (0 0 128 65 5)
16 >>> (0 0 128 65 1)
16.9 >>> (51 51 135 65 2)
17 >>> (0 0 136 65 2)
17 >>> (0 0 136 65 0)
17.25 >>> (0 0 138 65 1)
17.7 >>> (154 153 141 65 1)
18 >>> (0 0 144 65 3)
18 >>> (0 0 144 65 1)
18.5 >>> (0 0 148 65 1)
18.5 >>> (0 0 148 65 1)
18.5 >>> (0 0 148 65 2)
18.5 >>> (0 0 148 65 3)
18.5 >>> (0 0 148 65 2)
18.75 >>> (0 0 150 65 2)
18.8 >>> (102 102 150 65 3)
19 >>> (0 0 152 65 0)
19 >>> (0 0 152 65 1)
19 >>> (0 0 152 65 0)
19 >>> (0 0 152 65 2)
19.02 >>> (246 40 152 65 1)
19.1 >>> (205 204 152 65 1)
19.4 >>> (51 51 155 65 1)
19.5 >>> (0 0 156 65 3)
19.6 >>> (205 204 156 65 1)
19.75 >>> (0 0 158 65 3)
19.9 >>> (51 51 159 65 1)
20 >>> (0 0 160 65 5)
20 >>> (0 0 160 65 0)
20 >>> (0 0 160 65 2)
20 >>> (0 0 160 65 1)
20 >>> (0 0 160 65 2)
20.14 >>> (184 30 161 65 1)
20.5 >>> (0 0 164 65 2)
20.5 >>> (0 0 164 65 1)
20.5 >>> (0 0 164 65 2)
20.6 >>> (205 204 164 65 1)
21 >>> (0 0 168 65 2)
21 >>> (0 0 168 65 2)
21 >>> (0 0 168 65 0)
21.2 >>> (154 153 169 65 1)
21.4 >>> (51 51 171 65 1)
21.5 >>> (0 0 172 65 0)
21.5 >>> (0 0 172 65 2)
21.5 >>> (0 0 172 65 2)
21.5 >>> (0 0 172 65 6)
21.95 >>> (154 153 175 65 1)
22 >>> (0 0 176 65 2)
22 >>> (0 0 176 65 1)
22.5 >>> (0 0 180 65 1)
22.5 >>> (0 0 180 65 2)
22.5 >>> (0 0 180 65 2)
22.6 >>> (205 204 180 65 3)
22.7 >>> (154 153 181 65 1)
22.75 >>> (0 0 182 65 3)
23 >>> (0 0 184 65 2)
23.18 >>> (164 112 185 65 1)
23.5 >>> (0 0 188 65 2)
23.6 >>> (205 204 188 65 1)
23.7 >>> (154 153 189 65 1)
23.7 >>> (154 153 189 65 1)
23.8 >>> (102 102 190 65 2)
24 >>> (0 0 192 65 1)
24 >>> (0 0 192 65 3)
24 >>> (0 0 192 65 1)
24.5 >>> (0 0 196 65 3)
24.6 >>> (205 204 196 65 1)
24.9 >>> (51 51 199 65 1)
25 >>> (0 0 200 65 1)
25 >>> (0 0 200 65 2)
25.5 >>> (0 0 204 65 5)
25.5 >>> (0 0 204 65 2)
25.6 >>> (205 204 204 65 1)
26 >>> (0 0 208 65 1)
26 >>> (0 0 208 65 0)
26 >>> (0 0 208 65 2)
Re: Number Encryption Algorithm
Please explain in onerous detail why, in some cases, input values, such as 14 or 11.5, have multiple potential output values.
Re: Number Encryption Algorithm
Quote:
Originally Posted by
mrnooo2000
I need vb.net code to encrypt numbers to have a fixed length string of 5 characters
Congratulations. Let us know how it goes. If you encounter a particular issue along the way, let us know and we may be able to help.
Re: Number Encryption Algorithm
it is a homework
i think the multiple values indicate that the 5th character in ignored in the encryption this what i think
Re: Number Encryption Algorithm
Quote:
Originally Posted by
mrnooo2000
it is a homework
i think the multiple values indicate that the 5th character in ignored in the encryption this what i think
Sounds like fun homework. Good luck with it.
Re: Number Encryption Algorithm
Re: Number Encryption Algorithm
This site is not intended as a code-writing service. It's your homework so you need to show that you've put some thought and effort into it. If you have no idea whatsoever then you don't really deserve any marks for the assignment. I say that not to be mean but to be realistic. You should have your notes and/or text book from your class to refer to and your teacher should be your first port of call if you can't get started. When you've done all you can and encounter a specific issue that you can't get past, that would be the time to post here and you'll find plenty of people willing to help, myself included. The question, as you've presented it, seems nonsensical. It looks like all you've presented is a lookup table.
Re: Number Encryption Algorithm
the task is a database containing data and u are asked to add new data to it
the old data is encrypted with diferrent simple algorithms
text data encrypted with cesar algorithm
numbers encrypted to new characters on basis of 2^4 or 2^5 (i think)
i just need an idea
Re: Number Encryption Algorithm
no cheats here the task is open for search an trials
really i do mybest but i'm lost i need a start
Re: Number Encryption Algorithm
Quote:
Originally Posted by
mrnooo2000
numbers encrypted to new characters on basis of 2^4 or 2^5 (i think)
How are we supposed to know if you don't? That something that you need to confirm first. That's got nothing to do with VB.NET development specifically.
Quote:
Originally Posted by
mrnooo2000
no cheats here the task is open for search an trials
Searching the web for existing information is one thing - that's to be encouraged for any developer - but posting your homework and saying "tell me how" is something else entirely.
Anyway, I've said my bit. I'll say no more unless you show that you've made some initial progress at least.
Re: Number Encryption Algorithm
the data i have posted is the resault of my effort
i was not given all these data and i came to the forum after many days of hard work
i wrore code to get numbers from the encrypted string
i was thinking that there is a known algorithm for that
Re: Number Encryption Algorithm
That's all information that should have been provided up front. There's no way that we were going to just guess all that. You need to provide a full and clear explanation of the problem. You've gone a long way to doing that now but I think there's still missing information. For instance, why did you think that that code should do as you need? Did you just pluck codepage 1256 out of thin air? Assume that we know nothing about your project (because we don't) and provide ALL the relevant information.
Re: Number Encryption Algorithm
What you've posted thus far is basically meaningless to anyone who isn't in the same class as you.
You might as well post the full wording of the actual assignment question. At this point I'm pretty much only in this thread for entertainment, and I'm assuming jmc has pretty much checked out as well, but if you post the text of the actual assignment it might pique the interest of those who can offer useful advice.
Re: Number Encryption Algorithm
there were no information supplied except the data(encrypted string characters in a database table) and gui form to show plain data
i converted encrypted string characters to their ascii values
and wrote the code to convert these acsii values to the original numbers
the goal of the exercise is to add new data to the database
Re: Number Encryption Algorithm
Just a nice tip be sure to end your Codeblock with the corresponding [/Code]
Also you just pasted a bunch of code and asked us to do it for you...It is homework. It means YOU need to do it, not us. Google is a good friend, he can help you solve a lot of tutorial related questions..
Re: Number Encryption Algorithm
Quote:
Originally Posted by
mrnooo2000
there were no information supplied except the data(encrypted string characters in a database table) and gui form to show plain data
i converted encrypted string characters to their ascii values
and wrote the code to convert these acsii values to the original numbers
the goal of the exercise is to add new data to the database
Ok, if the goal is to add new data to a database then let's focus on that. What type of database? What have you tried? What is the database table structure (Field names and data type). Or do you have that part working??
Re: Number Encryption Algorithm
Quote:
Originally Posted by
wes4dbt
Ok, if the goal is to add new data to a database then let's focus on that. What type of database? What have you tried? What is the database table structure (Field names and data type). Or do you have that part working??
the problem is not the data addition (i can manage)
the proplem is encrypting data with the same algorithm as old data
Re: Number Encryption Algorithm
Quote:
Originally Posted by
jdc20181
Just a nice tip be sure to end your Codeblock with the corresponding [/Code]
Also you just pasted a bunch of code and asked us to do it for you...It is homework. It means YOU need to do it, not us. Google is a good friend, he can help you solve a lot of tutorial related questions..
ofcourse it is my homework , and i want idea about this encryption algorithm to do it myself
i dont want any one to do it instead of me
i search for the idea only and i googled itwith no success
Re: Number Encryption Algorithm
Quote:
Originally Posted by
mrnooo2000
ofcourse it is my homework , and i want idea about this encryption algorithm to do it myself
Being asked to crack encryption methods without any clues sounds like a very strange homework assignment to me. Anyway...
Your unencrypted numbers are floating point numbers. Your encrypted data consists of 5 byte values.
In .NET, the Single Data Type is one of the Data Types that is used to hold floats. It uses just 4 bytes internally.
You can use the BitConverter.GetBytes(Single) Method to examine those 4 Byte values.
The BitConverter.ToSingle(Byte(), Int32) Method goes the other way (produces a floating point number from 4 Byte values).
Re: Number Encryption Algorithm
OP, why did you delete the code you had posted in post 11?
It is very hard to follow what the status of your issue is. Is it the case that you've figured out how to do one way of this process but are struggling with reversing the process?
The code you had posted and had deleted looked like you might have been on the right track, but since that is gone it is a mystery what exactly your issue is.
Re: Number Encryption Algorithm
Quote:
OP, why did you delete the code you had posted in post 11?
i deleted code cause i found some errors in resualts
Re: Number Encryption Algorithm
Quote:
Originally Posted by
Inferrd
Being asked to crack encryption methods without any clues sounds like a very strange homework assignment to me. Anyway...
Your unencrypted numbers are floating point numbers. Your encrypted data consists of 5 byte values.
In .NET, the Single Data Type is one of the Data Types that is used to hold floats. It uses just 4 bytes internally.
You can use the
BitConverter.GetBytes(Single) Method to examine those 4 Byte values.
The
BitConverter.ToSingle(Byte(), Int32) Method goes the other way (produces a floating point number from 4 Byte values).
yes i think that is exactly what i need
i will give it a try
