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Experts Uncover Passive Method to Extract Private RSA Keys from SSH Connections

Experts Uncover Passive Method to Extract Private RSA Keys from SSH Connections
Nov 27, 2023 Server Security / Encryption
A new study has demonstrated that it's possible for passive network attackers to obtain private RSA host keys from a vulnerable SSH server by observing when naturally occurring computational faults that occur while the connection is being established. The Secure Shell (SSH) protocol is a method for securely transmitting commands and logging in to a computer over an unsecured network. Based on a client-server architecture, SSH uses cryptography to authenticate and encrypt connections between devices. A host key is a cryptographic key used for authenticating computers in the SSH protocol. Host keys are key pairs that are typically generated using public-key cryptosystems like RSA . "If a signing implementation using CRT-RSA has a fault during signature computation, an attacker who observes this signature may be able to compute the signer's private key," a group of academics from the University of California, San Diego, and Massachusetts Institute of Technology said

Hundreds of SSH Private Keys exposed via GitHub Search

Hundreds of SSH Private Keys exposed via GitHub Search
Jan 25, 2013
GitHub is a source code repository which lets developers work on programs together as a team, even when they are in different locations. Each repository on the site is a public folder designed to hold the software code that a developer is working on. This Tuesday GitHub announced a major upgrades to the site's search engine, " Finding great code on GitHub just got a whole lot easier, ". Yesterday few twitter users pointed out that there is no shortage of embedded private SSH keys and passwords that can easily be found via GitHub new feature. If you upload security information (keys/passwords etc) to a public repository, new search feature will allow anyone to find them. Today, GitHub's search function stopped working , though the site didn't acknowledge the cause. Updated message is " Search remains unavailable. The cluster is recovering slowly and we continue to monitor its progress. We'll provide further updates as they become available
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