encrypting Encrypting string

[toufik 2]

what 's the best way to encrypt a string .?,
and to it password for example 

[David Heffernan 2353]

It depends on what your usage is

[toufik 2]

2 minutes ago, David Heffernan said:

It depends on what your usage is

i want to encrypt serial  number 

[David Heffernan 2353]

It doesn't much matter what the thing is that you encrypt. What matters is who encrypts it, and who has knowledge of the key or keys used to encrypt and decrypt. That's what I mean by usage. 

 

As for how you do it, convert the text to binary using a well defined encoding, e.g. UTF8, and encrypt that. Encryption algorithms work with binary data not text. 

[toufik 2]

3 minutes ago, David Heffernan said:

It doesn't much matter what the thing is that you encrypt. What matters is who encrypts it, and who has knowledge of the key or keys used to encrypt and decrypt. That's what I mean by usage. 

 

As for how you do it, convert the text to binary using a well defined encoding, e.g. UTF8, and encrypt that. Encryption algorithms work with binary data not text. 

thanks for  replay i will try to get into it thank  s again 

[FPiette 385]

There are a huge number of encryption methods. The best depends on the context you say nothing about.

As a start, see this article which is really a very basic encryption method.

For a more advanced solution, look for example at this source code on github.

[David Heffernan 2353]

4 minutes ago, FPiette said:

As a start, see this article which is really a very basic encryption method.

Nothing there is useful. Hard to get past the basic sin of treating a string as if it were a byte array. 

[corneliusdavid 220]

12 hours ago, toufik said:

what 's the best way to encrypt a string .?,
and to it password for example 

You mention passwords (and then serial numbers). Instead of encrypting, do you just want to hash it and store the hash, which can't be decrypted? This is often done with passwords (or a serial number that is entered for verification) where you don't ever need to decrypt the stored value, just generate a hash each time it's entered and compare the entered hash to the stored hash.

[Anders Melander 1815]

11 hours ago, David Heffernan said:

Nothing there is useful. Hard to get past the basic sin of treating a string as if it were a byte array.

Not that what you say aren't true, but look at the screenshots. It's Delphi 7 so strings are basically byte arrays.

[David Heffernan 2353]

19 minutes ago, Anders Melander said:

Not that what you say aren't true, but look at the screenshots. It's Delphi 7 so strings are basically byte arrays.

Fair enough. Let's just switch to PHP then and be done with it. Bruh. 

[toufik 2]

thank you all for help 
@FPiette you helped a lot thanks again .....

Edited December 30, 2021 by toufik

[Kim Madsen 4]

Here is a blog post about exactly that.

https://components4developers.blog/2017/09/01/encryption-of-a-string/

 

[toufik 2]

16 hours ago, Kim Madsen said:

Here is a blog post about exactly that.

https://components4developers.blog/2017/09/01/encryption-of-a-string/

 

great components ,,not free tho ^^ thanks for reply 

[Kim Madsen 4]

15 hours ago, toufik said:

great components ,,not free tho ^^ thanks for reply 

kbmMW Community Edition is free and contains what you need.

[Foersom 5]

15 hours ago, toufik said:

great components ,,not free tho ^^ thanks for reply 

Delphi Encryption Compendium, version 6.x, can do everything and is free.
https://github.com/MHumm/DelphiEncryptionCompendium

Edited January 1, 2022 by Foersom

[toufik 2]

11 hours ago, Foersom said:

Delphi Encryption Compendium, version 6.x, can do everything and is free.
https://github.com/MHumm/DelphiEncryptionCompendium

thanks i will give it a try