Last week, a backdoor was discovered in xz-utils. The backdoor processes commands sent using RSA public keys as a covert channel. In order to prevent anyone else from using the backdoor, the threat actor implemented a cryptographic signature check on the payload. I have seen a number of people claim that this would necessarily result in an obviously invalid RSA public key, or at least one with no corresponding private key. This is incorrect, and someone nerd sniped me into proving it.| rya.nc
OSSnews24 - Riceviamo e pubblichiamo una nota di Federazione Migep e Stati Generali Oss. Nell’attuale scenario delle residenze sanitarie assistenziali (Rsa) si L'articolo “L’impiego distorto degli oss nelle Rsa: una deriva da correggere nella nuova sanità assistenziale” proviene da OssNews24.| OssNews24
Our cybersecurity experts Hally Wax, Brendan Hughes and Madison Pappas share insider strategies for making your brand stand out at RSAC 2025.| RH Strategic
About a month ago I read this excellent piece of work https://blog.benjojo.co.uk/post/auditing-github-users-keys . My first reaction was kick myself for not thinking of it before. It reminded me of this paper https://factorable.net/paper.html and associated the presentation which is pretty special. One of the major tools used in that paper was use of a batch version of the Greatest Common Divisor algorithm that can efficiently find common factors in large numbers of semi primes. Common ...| Nat McHugh
Here is a little challenge I have had some fun with recently.| Nat McHugh
This thing got long and can basically be summarised as:| Nat McHugh
In my last blog post I wrote a little crash course on RSA and how it works without looking into any specific language implementations. Today I'd like to explore the native implementations of .NET and the new RSACng class which has been introduced with .NET Framework 4.6.| Dusted Codes
With the rapid growth of the internet and the vast business which is handled over the web it is not surprising that security has become an inevitable topic for any software developer these days.| Dusted Codes
Join DirectDefense at RSA Conference 2024 in San Fransisco DirectDefense will be present at RSA Conference this year, engaging with customers to enhance| DirectDefense
RSA is a public-key encryption algorithm that uses an asymmetric encryption algorithm to encrypt data. RSA is the primary method of encrypting data-in-motion.| Encryption Consulting
The goal of cryptography is to ensure data cannot be compromised & that data is authentic, which can be accomplished through encryption and digital signing.| Encryption Consulting
The major difference between the two types of encryption is, symmetric encryption uses 1 key, whereas asymmetric encryption uses 2 keys for data transfer.| Encryption Consulting
I recently had solar panels and a battery storage system from GivEnergy installed at my house. A major selling point for me was that they have a local network API which can be used to monitor and…| rya.nc
I have created a new OpenPGP key and will be transitioning away from my old key. If you have signed my old key, I would appreciate signatures on my new key as well. I have created a transition statement that Continue reading OpenPGP 2019 Key Transition Statement→| Simon Josefsson's blog
I have created a new OpenPGP key 54265e8c and will be transitioning away from my old key. If you have signed my old key, I would appreciate signatures on my new key as well. I have created a transition statement Continue reading OpenPGP Key Transition Statement→| Simon Josefsson's blog
| The Grumpy Troll: The Grumpy Troll
If you’re like most people, there’s a good chance that it’s been years since you’ve sent an email that wasn’t cryptographically signed. You don’t use PGP, you say? Well, even if you are…| rya.nc
Sometimes hacking requires doing things that, while possible to do with some algorithm, simply aren’t supported by any existing implementation. Usually for good reason. A good example of this…| rya.nc
I only got to solve one of the three leet challenges. It was a cryptography challenge where I can brute force two parameters known to be between 0 and 1000 and then work backwards to figure out q based on a hint leaked in the output. From there, it’s simple RSA.| 0xdf hacks stuff
Let’s Encrypt (the free, automated and open certificate authority) has just announced its launch schedule. According to it, certificates will be released to the public starting from the week of September 14, 2015.| andrea.corbellini.name
A comprehensive discussion and derivation of RSA cryptography, including the generalisation to multiple primes.| Sigma Prime
I've spent the last week or so writing a plugin for my website to render LaTeX without any client-side Javascript. As a demo, I'm publishing my high-school...| ersei.net