Tagged Questions
0
votes
1answer
80 views
Preimage resistance hash in digital signature
I'm studying about preimage resistance property of the hash functions.
In particularly I'm reading as the missing of this property can be fatal in digital signatures that use RSA.
Further details:
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1
vote
1answer
42 views
When making public key fingerprints - is a sha1 hash still a good idea?
I'm thinking about trying to save some space (and readability) when referencing 2k and 4k public keys (millions of them) by storing the fingerprint in some places instead of the full public key.
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0
votes
2answers
132 views
Physical Level Encryption
What types of algorithms that are capable of signing a message are out there that run on a physical level, e.g. lacking the infrastructure of a standard PC, no memory, processor or motherboard in the ...
2
votes
4answers
203 views
Tamper-proofing log files
Problem Overview
I want to securely store log files so the contents are secret, and they can't be modified without detection.
The files will be encrypted using authenticated encryption (AES in GCM ...
2
votes
2answers
143 views
How can mega store my login details and still be secure?
I understand how Mega's encryption works. For a quick summary of all those in the future looking for an answer on this... here is how it works:
Upon first signing up for an account you make a ...
1
vote
1answer
190 views
“Signing” with public key
For this question, the following caveats and assumptions hold:
There exists a 2048-bit RSA key pair used exclusively for signing/verification
The private key is kept completely private
There exists ...
3
votes
3answers
506 views
Why hash or salt when signing?
I've seen an example of how to sign using RSA. Besides the signing itself (s = m^d mod n) it also hashes and adds an IV.
Why is that needed?
3
votes
2answers
2k views
Difference between “Signature Algorithm” and “Signature Hash Algorithm” in X.509
What's the difference between the "Signature Algorithm" and the "Signature Hash Algorithm" found in an X.509 certificate? Why does it need a "Signature Hash Algorithm"?
Edit:
I'm creating the ...
