Collaborate Disseminate
For example, lets say there are two people named, Bob, and Jim.
Bob wants to send Jim a long secret message, and he decides to use a OTP to encrypt his message. Both Bob and Jim know a secret password but it’s only 8 charac… Continue reading Is this adaptation of using a One Time Pad safe?
Our application needs to generate secure keys for long term storage on AWS using openssl. But I’ve seen some instance where entropy falls dangerously low on AWS machines and this doesn’t appear to be 100% safe. People have reported low e… Continue reading How can you securely generate keys on AWS?
Is it better to create a separate SSH key for each host and user or just using the id_rsa key for all hosts to authenticate? Could one id_rsa be malpractice for the privacy/anonymity policies?
having one ssh-key for all hosts:
~/.ssh/id_rs… Continue reading Best Practice: ”separate ssh-key per host and user“ vs. ”one ssh-key for all hosts“
Knowledge of a CA private key would allow MitM attackers to transparently supplant any certificates signed by that private key. It would also allow cyber criminals to start forging their own trusted certificates and selling them on the bla… Continue reading How do certification authorities store their private root keys?
As someone who knows little about cryptography, I wonder about the choice I make when creating ssh-keys.
ssh-keygen -t type, where type is either of dsa,rsa and ecdsa.
Googling can give some information about differences be… Continue reading SSH key-type, rsa, dsa, ecdsa, are there easy answers for which to choose when?
What exactly does the “key signing” mean?
So for example I have a private/public GPG key so that people could send me encrypted e-mail, because they know my public key. But: what does key signing mean in this example? E.g.: “a third perso… Continue reading What does key signing mean?
I would like to know if generating a PGP key with a number of bits higher than 4096 is possible and if so how?
Continue reading Generate a PGP key with more than 4096 bits?
I am generating a 2048-bit safe prime for a Diffie-Hellman-type key, p such that p and (p-1)/2 are both prime.
How few iterations of Rabin-Miller can I use on both p and (p-1)/2 and still be confident of a cryptographically … Continue reading How many iterations of Rabin-Miller should be used to generate cryptographic safe primes?