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How I Found a 20-Year-Old Linux Kernel Bug
Robert O'Callahan. Christian. Kiwi. Software guy. All content human-authored unless otherwise noted.
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Facebook activated my dormant account and won’t let me deactivate it
Zet Casino 2026: tysiące gier, bonus powitalny, wpłaty BLIK i krypto, wypłaty w minutach oraz polskie wsparcie 24/7. Sprawdź naszą ofertę.
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Someone Created a Tor Hidden Service to Phish My Tor Hidden Service
SMS Privacy is available as a Tor hidden service, and it turns out ~10% of users actually use it that way. This post details what I found when somebody created a phishing site of my Tor hidden service.
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Suicide Linux
You know how sometimes if you mistype a filename in Bash, it corrects your spelling and runs the command anyway?* Such as when changing directory, or opening a file. I have an idea: Suicide Linux. Any time - any time - you type any remotely incorrect command, the interpreter cr...
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Who is Anna-Senpai, the Mirai Worm Author?
On September 22, 2016, this site was forced offline for nearly four days after it was hit with “ Mirai ,” a malware strain that enslaves poorly secured Internet of Things (IoT) devices like wireless routers and security cameras into a botnet for use in large cyberattacks. Roughly a week after that assault, the…
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Microsoft Issues WanaCrypt Patch for Windows 8, XP
Microsoft Corp. today took the unusual step of issuing security updates to address flaws in older, unsupported versions of Windows — including Windows XP and Windows 8 . The move is a bid to slow the spread of the WanaCrypt ransomware strain that infected tens of thousands of Windows computers virtually overnight this…
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Important security vulnerabilities in OpenVPN
UPDATE: OpenVPN fuzzers now released. Summary I’ve discovered 4 important security vulnerabilities in OpenVPN. Interestingly, these were not found by the two recently completed audits of Open…
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Don't Take Security Advice from SEO Experts or Psychics
As best I understand it, one of the most effective SEO things you can do is to repeat all the important words on your site down the bottom of the page. To save it from looking weird, you make the text the same colour as the background so people can'
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The design of Chacha20
Chacha20 is a secure, fast, and amazingly simple encryption algorithm. Let's take a look.
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How to break a Captcha system in 15 minutes with Machine Learning
Let’s hack the world’s most popular Wordpress CAPTCHA Plug-in
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LastPass: Security done wrong
Disclaimer: I am the author of Easy Passwords which is also a password manager and could be considered LastPass competitor in the widest sense. Six month ago I wrote a detailed analysis of LastPass security architecture. In particular, I wrote:
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Duck Duck Go: Illusion of Privacy (2013)
There have been several articles in the press recently about users flocking to DuckDuckGo in the wake of the recent NSA snooping revel...
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Avast Antivirus Remote Stack Buffer Overflow with Magic Numbers
Blog about anti-virus software vulnerabilities.
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PuTTY 0.68 has been released
Home | FAQ | Feedback | Licence | Updates | Mirrors | Keys | Links | Team Download: Stable · Snapshot | Docs | Privacy | Changes | Wishlist
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Maybe Skip SHA-3
In 2005 and 2006, a series of significant results were published against SHA-1 [ 1 ][ 2 ][ 3 ]. These repeated break-throughs caused something of a crisis of faith as cryptographers questioned whether we knew how to build hash functions at all. After all, many hash functions from the 1990's had not aged well [ 1 ][ 2…
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Tales of SugarCRM Security Horrors
This is the personal website of Egidio Romano, a very curious guy from Sicily, Italy. He's a computer security enthusiast, particularly addicted to webapp security.
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From Markdown to remote code execution in Atom
Recently I took a look at Atom, a text editor by GitHub. With a little bit of work, I was able to chain multiple vulnerabilities in Atom into an actual Remote Code Execution. The vulnerabiliti…
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Building Safe AI: A Tutorial on Homomorphically Encrypted Deep Learning
A machine learning craftsmanship blog.
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How to confirm a Google user’s specific email address
I reported an issue to Google, which allows an attacker to confirm whether someone is logged in to any one of a list of specific Google accounts.
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Securing a laptop for travel to China
We're all impatiently waiting on quantum-proof asymmetrical crypto algorithms to become commonplace. Until that happens, we must all live with the assumption that all currently used asymmetric crypto will be trivially decryptable once quantum computers become powerful enough. This is probably the reason why government…
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I can no longer recommend MailChimp
MailChimp doesn’t seem to think double opt-in is a good idea for mailing lists anymore.
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Formal Verification: The Gap Between Perfect Code and Reality
Thanks to Vlad Brown and Drawings Team for Russian and Uzbek translations. In Fall 2017, I took MIT’s 6.826, Principles of Computer Systems, taught by Turing Award-winner Butler Lampson, Nickolai Z
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