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| bio | website | |
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| age | ||
| visits | member for | 1 year, 6 months |
| seen | May 12 at 19:53 | |
| stats | profile views | 0 |
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May 8 |
revised |
What length should the padding be when encrypting or signing with RSA? deleted 29 characters in body; edited title |
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May 5 |
accepted | What length should the padding be when encrypting or signing with RSA? |
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May 5 |
comment |
What length should the padding be when encrypting or signing with RSA? Oh.. and thank you very much for your answer! |
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May 5 |
comment |
What length should the padding be when encrypting or signing with RSA? @JohnDeters I don't care if two identical messages yield the same output. I'm trying to implement a licensing system. (See my comments to fgrieu's answer and my other recent question on the site .) And I'm mainly concerned with signing. |
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May 5 |
comment |
What length should the padding be when encrypting or signing with RSA? a) I should calculate a separate padding (is that the term instead of salt?) for each computer (in a random-like manner). And perhaps add a really-random part to it. b) The padding should be at least $256 + (2/3) n$ bits (which, if $n$ is 2048 - would leave me with a maximum of 426 bits (=53 bytes) for the computer-id (or its hash). Did I understand correctly? |
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May 5 |
comment |
What length should the padding be when encrypting or signing with RSA? So... I understand from your answer that in the signature scheme where (as a licensing system) I'm signing a user's computer's hardware-id and returning it to the user's computer - having my application on that computer verify that the returned value is indeed the signed hardware-id: the following will be true: |
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May 3 |
comment |
What length should the padding be when encrypting or signing with RSA? @fgrieu I'm converting a byte array to a BigInteger but first concatenating a new byte array to the end of the original one (before converting to BigInteger) and using that as $m$ in $m^d \bmod n$. |
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May 3 |
comment |
What length should the padding be when encrypting or signing with RSA? @fgrieu concatenation. $(m+salt)^d \bmod n$ - Thanks. I was looking for that formatting. |
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May 3 |
comment |
What length should the padding be when encrypting or signing with RSA? @fgrieu m^d mod n VS (m+salt)^d mod n |
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May 3 |
revised |
What length should the padding be when encrypting or signing with RSA? deleted 23 characters in body; edited title |
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May 3 |
asked | What length should the padding be when encrypting or signing with RSA? |
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Aug 10 |
comment |
What is the length of an RSA signature? OK, I found the answer to that one here: stackoverflow.com/a/2922135/939213 - Yes, the modulus itself is 2048. |
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Aug 10 |
accepted | What is the length of an RSA signature? |
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Aug 10 |
awarded | Commentator |
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Aug 10 |
comment |
What is the length of an RSA signature? Thanks. And when we say 2048 bit encryption - Do we mean that N itself is 2048 bit? |
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Aug 10 |
comment |
What is the length of an RSA signature? But since the signature is $m^d \bmod n$ - It seems that the length can even be $0$. Or are you referring to a system that will pad it as an extra feature? |
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Aug 10 |
asked | What is the length of an RSA signature? |
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Apr 30 |
accepted | How to sign a message using RSA? |
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Apr 30 |
comment |
How to sign a message using RSA? Thanks. As for BigInteger - See this in .NET 4.0. |
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Apr 30 |
comment |
Why hash or salt when signing? Thanks for the answer. |
