Hi,
I would like to enrypt and decrypt a simple line of text, with a
private(symmetr ic) key.
I have tried searching in the System.Cryptogr aphy class, but I can't
find a simple way of doing this job.
Can someone recommend me an easy way on how to do it.
Thanks in Advance
14  6566 
"Xarky" <be*********@ya hoo.com> wrote in message
news:bc******** *************** **@posting.goog le.com... Hi,
I would like to enrypt and decrypt a simple line of text, with a
private(symmetr ic) key.
I have tried searching in the System.Cryptogr aphy class, but I can't
find a simple way of doing this job.
Can someone recommend me an easy way on how to do it.
Thanks in Advance
There is a Microsoft way to do this. However you can also do it
naively, since every character is representable by an ascii number,
your line of text evaluates to a line of numbers, on which you can
let loose some algorithm to scramble it.
Zach <wa**********@a ll.here> wrote: "Xarky" <be*********@ya hoo.com> wrote in message
news:bc******** *************** **@posting.goog le.com... Hi,
I would like to enrypt and decrypt a simple line of text, with a
private(symmetr ic) key.
I have tried searching in the System.Cryptogr aphy class, but I can't
find a simple way of doing this job.
Can someone recommend me an easy way on how to do it.
Thanks in Advance
There is a Microsoft way to do this. However you can also do it
naively, since every character is representable by an ascii number,
your line of text evaluates to a line of numbers, on which you can
let loose some algorithm to scramble it.
No, *not* every character is representable by an ascii number. ASCII
has no Unicode values over 127, whereas there are *loads* of Unicode
characters over 127...
--
Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
"Jon Skeet [C# MVP]" <sk***@pobox.co m> wrote in message
news:MP******** *************** *@msnews.micros oft.com... Zach <wa**********@a ll.here> wrote: "Xarky" <be*********@ya hoo.com> wrote in message
news:bc******** *************** **@posting.goog le.com... Hi,
I would like to enrypt and decrypt a simple line of text, with a
private(symmetr ic) key.
I have tried searching in the System.Cryptogr aphy class, but I can't
find a simple way of doing this job.
Can someone recommend me an easy way on how to do it.
Thanks in Advance
There is a Microsoft way to do this. However you can also do it
naively, since every character is representable by an ascii number,
your line of text evaluates to a line of numbers, on which you can
let loose some algorithm to scramble it.
No, *not* every character is representable by an ascii number. ASCII
has no Unicode values over 127, whereas there are *loads* of Unicode
characters over 127...
Oh dear, the OP is talking about "a simple line of text".
Xarky,
Check out any of the classes that derive from
System.Security .Cryptography.S ymmetricAlgorit hm.
Regards,
Joakim
Xarky wrote: Hi,
I would like to enrypt and decrypt a simple line of text, with a
private(symmetr ic) key.
I have tried searching in the System.Cryptogr aphy class, but I can't
find a simple way of doing this job.
Can someone recommend me an easy way on how to do it.
Thanks in Advance
"Jon Skeet [C# MVP]" <sk***@pobox.co m> wrote in message
news:MP******** *************** *@msnews.micros oft.com... Zach <wa**********@a ll.here> wrote: "Xarky" <be*********@ya hoo.com> wrote in message
news:bc******** *************** **@posting.goog le.com... Hi,
I would like to enrypt and decrypt a simple line of text, with a
private(symmetr ic) key.
I have tried searching in the System.Cryptogr aphy class, but I can't
find a simple way of doing this job.
Can someone recommend me an easy way on how to do it.
Thanks in Advance
There is a Microsoft way to do this. However you can also do it
naively, since every character is representable by an ascii number,
your line of text evaluates to a line of numbers, on which you can
let loose some algorithm to scramble it.
No, *not* every character is representable by an ascii number. ASCII
has no Unicode values over 127, whereas there are *loads* of Unicode
characters over 127...
--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
If thew OPs line of text is in Unified Canadian Aboriginal Syllabics
this is where he will find the unicode http://www.geocities.com/Athens/Acad.../fontset.htm#a
Zach <wa**********@a ll.here> wrote: No, *not* every character is representable by an ascii number. ASCII
has no Unicode values over 127, whereas there are *loads* of Unicode
characters over 127...
Oh dear, the OP is talking about "a simple line of text".
So are you 100% positive that a "simple line of text" can't contain any
non-ASCII characters? That's a view which is very much biased towards
the English-speaking world.
Basically, assuming that ASCII is good enough for text files is a
recipe for disaster unless you have specifications which you can
guarantee won't change to allow "real" text. (It's usually good enough
for header names, but not always header values, for instance.)
There are perfectly good ways of encrypting text without making such
assumptions - just using UTF-8 instead of ASCII to convert the text
data into binary data would be my suggestion.
--
Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
I have written an article that may help you: http://www.dalepreston.com/Blog/Arch...0_Archive.html
DalePres
MCAD, MCDBA, MCSE
"Xarky" <be*********@ya hoo.com> wrote in message
news:bc******** *************** **@posting.goog le.com... Hi,
I would like to enrypt and decrypt a simple line of text, with a
private(symmetr ic) key.
I have tried searching in the System.Cryptogr aphy class, but I can't
find a simple way of doing this job.
Can someone recommend me an easy way on how to do it.
Thanks in Advance
DalePres <don-t-spa-m-me@lea-ve-me-a-lone--.com> wrote: I have written an article that may help you:
http://www.dalepreston.com/Blog/Arch...0_Archive.html
Unfortunately that makes the same mistake that Zach did - assuming that
all text is ASCII.
I suggest using UTF-8 instead. Just use Encoding.UTF8.G etBytes instead
of Encoding.ASCII. (I'm also not sure why you're using Encoding.ASCII
in one place and manually creating an instance of ASCIIEncoding in
another.)
Also note that the call to Substring at the end isn't required if you
do things properly - don't assume that the decrypted data is the same
length as the encrypted data, but read the whole of the stream instead.
(Also don't assume that a single call to Stream.Read will do everything
you want it to. See http://www.pobox.com/~skeet/csharp/readbinary.html
for more on this.)
--
Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
Thanks for the good ideas.
DalePres
"Jon Skeet [C# MVP]" <sk***@pobox.co m> wrote in message
news:MP******** *************** *@msnews.micros oft.com... DalePres <don-t-spa-m-me@lea-ve-me-a-lone--.com> wrote: I have written an article that may help you:
http://www.dalepreston.com/Blog/Arch...0_Archive.html
Unfortunately that makes the same mistake that Zach did - assuming that
all text is ASCII.
I suggest using UTF-8 instead. Just use Encoding.UTF8.G etBytes instead
of Encoding.ASCII. (I'm also not sure why you're using Encoding.ASCII
in one place and manually creating an instance of ASCIIEncoding in
another.)
Also note that the call to Substring at the end isn't required if you
do things properly - don't assume that the decrypted data is the same
length as the encrypted data, but read the whole of the stream instead.
(Also don't assume that a single call to Stream.Read will do everything
you want it to. See http://www.pobox.com/~skeet/csharp/readbinary.html
for more on this.)
--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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