Tagged Questions

0
votes
3answers
206 views

Brute forcing ssh keys

My problem is a common one: I deleted my SSH key, and forgot to set rm to point to a .trash file. I have the public key, and I need to get in this server. I am not doing this on anyone else's server. ...
6
votes
1answer
240 views

Is it secure to transfer an RSA public key by email?

I've set up my VPS'ssh server to accept only key-based identification: I disabled password-based connection. As a consequence I am connecting from home with an RSA key generated prior to password ...
1
vote
4answers
301 views

SSH: reusing public keys and known-man-in-the-middle

Usually, people recommend to use a single private-public key pair everywhere (if we're not talking about a possibility of compromising the private key): Best Practice: “One per-user ssh key” or ...
2
votes
1answer
122 views

What dangers are there in storing my private key on different servers?

This question is specifically concerned with storing keys in the cloud, and is somewhat applicable. But I've got a laptop and a desktop computer at home - I'm the admin on both of those systems, and ...
1
vote
2answers
703 views

Creating user specific authentication methods in SSH

I have configured sshd on an Ubuntu server to use key authentication and it is working fine. I had to disable password authentication for key authentication to work. Server is always accessed via ...
6
votes
4answers
561 views

can ssh passwordless public key authentication be ok if combined with a VPN?

Having a debate with a coworker about the merits & faults of public key authentication with ssh. I'm basically wondering what all the possible merits and faults are, especially in regards to ...
10
votes
3answers
733 views

What's the common pragmatic strategy for managing key pairs?

I have a small number of different workstations (plus client devices like iPhone) that I use for to connecting to numerous servers using SSH. Originally when I learned about PKI, I created a single ...
6
votes
3answers
1k views

How can I convert my encypted PGP secret key for use performing SSH authentication?

I wish to covert my PGP key (RSA) to be used performing SSH authentication. After some searching, I found openpgp2ssh, which appears to be an appropriate tool. Everything works swimmingly for my ...
72
votes
3answers
44k views

RSA vs. DSA for SSH authentication keys

When generating SSH authentication keys on a Unix/Linux system with ssh-keygen, you're given the choice of creating a RSA or DSA key pair (using -t type). What is the difference between RSA and DSA ...
23
votes
6answers
1k views

Is using a public-key for logging in to SSH any better than saving a password?

Using a public/private key pair is fairly convenient for logging in to frequented hosts, but if I'm using a key pair with no password, is that any safer (or less safe) than a password? The security ...
13
votes
3answers
1k views

What are the chances to generate the same ssh key?

I could generate ssh keys on the client like (without password): ssh-keygen -b 8192 -t rsa -f /home/THEUSER/.ssh/id_rsa -P '' -v and copy the generated id_rsa.pub to the server: ssh-copy-id -i ...