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Dec
18
awarded  Yearling
Apr
29
awarded  Commentator
Apr
29
comment Certificate == signed public key
In addition, the word "plaintext" is used in contrast with "ciphertext", that we do not have in the case of signatures. To answer your question, the message is not part of the certificate, while the public key used to verify the signatures is.
Apr
29
comment Certificate == signed public key
This is NOT a secure signature scheme. If you have two messages signed, you can compute a signature of their product simply multiplying their signatures.
Mar
18
comment How to verify a number encrypted with an unknown key
Why do you need this system? What problem are you trying to solve?
Jan
24
comment How to find an element of high-order in an RSA group?
Choose a random element. Since its order must divide the group order, if it is not 2 or 4, then it must be as big as the smallest between p and q. However, I do not know about how difficult the discrete log is in such group
Jan
24
comment How to find an element of high-order in an RSA group?
If you choose a SAFE rsa modulus (one written as (2p+1)(2q+1) with p,q,2p+1,2q+1 all primes) the order of the group is 4pq and is relatively easy to find elements of high order
Jan
22
awarded  Custodian
Jan
22
reviewed Reviewed Discrete logs on elliptic curve with embedding degree 3 with the 'MOV' attack
Jan
22
awarded  Critic
Jan
22
comment Two files encrypted with related data versus one file
Thanks for the suggestion! I briefly updated the answer to include that, feel free to expand and edit it if you wish. =)
Jan
22
revised Two files encrypted with related data versus one file
added 73 characters in body
Jan
22
comment Two files encrypted with related data versus one file
You are right. AES itself is just a (trapdoor) permutation. I think the way AES is used in Truecrypt (XTS mode) is IND-CPA.
Jan
22
answered Two files encrypted with related data versus one file
Dec
31
awarded  Supporter
Dec
31
awarded  Teacher
Dec
31
answered Difference between symmetric and asymmetric hash function?
Dec
29
awarded  Student
Dec
29
awarded  Editor