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Results tagged with rsa
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user 23303
An asymmetric (e.g. public-key) cryptosystem, based on modular exponentiation with big exponents and modulus. RSA can be used both for signature and encryption with proper paddings.
5
votes
1
answer
1k
views
Use RSA keys to derive AES key
Every end point has its own RSA key pair and RSA public key from the other end point, and I would like to combine them somehow on both sides to derive the same symmetric key. … I am looking for something like ECIES-KEM but for RSA.
EDIT:
From the RSA-KEM as suggested from Wiki:
I have on endpoint A private key SK_A and public key PK_B. …
- 573
3
votes
1
answer
5k
views
RSA key pair generation and FIPS 140-2, 186-4
What's the difference in FIPS 140-2 and FIPS 186-4 in connection with RSA key pair generation? … If I understand it correctly generating RSA key pair in FIPS 140-2 compliant environment will never show the private part of the RSA key pair as it is protected by cryptographic module. …
- 573
4
votes
1
answer
3k
views
How to calculate RSA CRT parameters from public key and private exponent
Given the public key (n, e) and private exponent (d), how to calculate CRT parameters (p, q, dP, dQ, and qInv) of this RSA key pair? …
- 573
1
vote
1
answer
892
views
Where I can find a list of certified software / hardware RNGs compliant to NIST SP 800-22?
I need to use NIST SP 800-22 approved software / hardware to generate RSA key pair.
Where I can find a list of certified software / hardware RNGs compliant to NIST SP 800-22? … If I generate RSA key pair with approved software compliant to FIPS 186-x, does it mean that it is also compliant to SP 800-22? …
- 573
2
votes
1
answer
2k
views
RSA modulus (N) from public key and calculating N from p, q not equal [closed]
I have a RSA public key in the form of public exponent and modulus as follows:
String exponent = "0000000000000003";
String modulus = "D8016FFDDFBA4B144B0AB13FF01968048B2FC9AA269311D11357DC8CEDCABA232BEC118D3B05AFA2406D27BFB6602B45B80E91D4F446E4A753C251EA6EB8AB8E3F304585DD202D8B04538EB4DD1F87D9A27E1E7B34A304396BBC38EE669E823BD03C1F43698B4B3128F3770C465CE415FD0F965F3170CED1470ED777751DE59D … ";
And also I have a private CRT key of the corresponding RSA key as follows:
String p = "F401F9E76A0E65D80AA8CF0D526D8D8747E53A3E1223B143AA73F675708ED966AB96965040907CCDF3D5C77904AA0906A6941E3A9C69AEC1F99E73E6EDB07191 …
- 573
2
votes
1
answer
643
views
PKCS#7 Signed Data contains always different signature
using Bouncy Castle by the way)
The SHA256withRSA is using the SHA-256 as a message digest algorithm and EMSA-PKCS1-v1_5 for encoding the message digest before signature generation operation with the RSA … I will decrypt the signature using the RSA public key, decode EMSA-PKCS1-v1_5 and the resulting hash is different than hash of the original message. …
- 573