John Opdenakker
@j_opdenakker
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Infosec blogger | Cyclist | Runner | Tweets might contain bad humor, sarcasm or irony | Takes your security seriously! | 🐘 @j_opdenakker @infosec .exchange
Belgium 🇧🇪
Joined June 2011
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Pinned Tweet
Will add my
#CyberSecurityAwarenessMonth
blogs to this thread.
If you like the content please retweet and feel free to share elsewhere. Help me reach ppl that are less aware about online security!
Oct. 1: Why everyone should care about online security.
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It’s password awareness Saturday. Send me a password and I tell you if it’s strong.
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To the person who stole my Microsoft Office License.
I'm gonna find you. You have my Word.
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Why are people from Norway so good at editing files in Linux?
Their ancestors are vi-kings.
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Set your wifi password to 2444666668888888
When someone asks what your password is, just tell them it’s 12345678
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Why are people from Norway so good at editing files in Linux?
Their ancestors are vi-kings.
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Where do Russian Hackers store their exploits?
/ussr/bin/
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Where do Russian Hackers store their exploits?
/ussr/bin/
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My password has been hacked again.
That's the third time I've had to increment the number at the end.
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Twitter has a new security feature, if you tweet a password it put asterisks instead.
******
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You know those silly hacker movies where they're hacking so hard they type on two keyboards at once?
Such blatant stereo-typing.
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My email password has been hacked again. That's the third time I've had to rename the cat.
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Why do Linux users always code in the dark ?
Because they don't have windows.
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It’s password awareness Friday.
Today I offer free consulting.
Send me a password and I tell you if it’s strong.
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Why are people from Norway so good at editing files in Linux?
Their ancestors are vi-kings.
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2K
Twitter has a new security feature, if you tweet a password it put asterisks instead. Try it now
******
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2K
Security by removal.
Remove all
- user accounts you no longer use
- software you no longer use on your pc
- redundant apps on your mobile devices
- unnecessary third party apps that have access other apps
- files or documents that contain sensitive information
#Infosec
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I am a programmer.
A journalist asked me what makes code bad.
I said...
No comment.
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My password has been hacked again. That's the third time I've had to change my date of birth.
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How did the hacker escape?
He used the backdoor and ransomware.
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It’s password awareness friday. Send me a password and I tell you if it’s strong.
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BREAKING NEWS: cyber security experts predict that people will still reuse weak passwords in 2022.
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My daughter called me an old man this morning.
We both laughed and laughed. Then I changed the WiFi password.
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Why do Linux users always code in the dark ?
They don't have windows.
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HTTPS & SSL doesn't mean "trust this." It means "this is private." You may be having a private conversation with Satan.
- Scott Hanselman
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Removing unused apps and data is an underrated security improvement.
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What’s your favorite Linux joke? Mine is:
Where do Russian Hackers store their exploits?
/ussr/bin/
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1K
How did the hacker escape?
He used the backdoor and ransomware.
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Why do Linux users always code in the dark ?
Because they don't have windows.
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DDoS is not hacking
DDoS is not hacking
DDoS is not hacking
DDoS is not hacking
DDoS is not hacking
DDoS is not hacking
DDoS is not hacking
DDoS is not hacking
DDoS is not hacking
DDoS is not hacking
DDoS is not hacking
DDoS is not hacking
DDoS is not hacking
DDoS is not hacking
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My password has been hacked again.
That's the third time I've had to ask my wife to change her name.
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I started to whisper and my wife asked me why I was whispering.
I told her I didn't want Mark Zuckerberg to hear us.
I laughed.
My wife laughed.
Alexa laughed.
Siri laughed.
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To me this is simply the best hacker conference poster ever!
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My password has been hacked again.
That's the third time I've had to increment the number at the end.
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I am a programmer. A journalist asked me what makes code bad. I said...
No comment
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Has anyone else bought the COVID-19 test kit from Aliexpress? I received mine today and it says I'm pregnant.
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Two wifi engineers got married.
The reception was fantastic.
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Don’t forget to increment the year in your password!
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Criminals don’t give a fuck if you’re ISO 27001 compliant
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Website/app developers: for the love of God stop preventing users from pasting passwords. 😱
It's one of the many - but probably my biggest - frustrations at account login.
#infosec
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What would be the first 3 things you'd do if a company hires you to help them improve their security?
These are mine, what about yours?
1) Asset management
2) Offsite backups for all assets (disaster recovery)
3) 2FA wherever possible
#Infosec
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Writing down unique passwords in a safely stored password book doesn’t get you hacked.
Reusing passwords does.
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How did the hacker escape?
He used the backdoor and ransomware.
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Holy shit. Researcher discovers that TeamViewer stores user passwords encrypted and finds the encryption key and initialization vector in the windows registry
#Infosec
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I’m not a elite hacker nor do I have any CVEs and that’s fine. Infosec entails so many subdomains. We’re all different people with different skills and that’s what makes it such an interesting domain.
Respect each other.
Learn from each other.
Get along and stop fighting.
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I met a guy who rapped about nothing but Linux systems.
His name was 50CentOS.
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My email password has been hacked. That's the third time I've had to rename the cat.
#LameJokeOfTheDay
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If you can't afford security you can't afford a data breach
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Criminals don’t give a fuck if you’re ISO 27001 compliant
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Posting this again because it’s so good.
“HTTPS & SSL doesn't mean "trust this." It means "this is private." You may be having a private conversation with Satan.”
- Scott Hanselman (
@shanselman
)
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If you ask people to change their password every 3 months they’ll either update the season and/or year or increment the number at the end. Don’t encourage bad password practices by forcing password changes on regular intervals.
#infosec
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Personal announcement: I’ve decided to stop with information security and become gardener.
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Reminder: writing down unique passwords in a safely stored password book doesn’t get you hacked.
Reusing passwords does.
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HTTPS & SSL doesn't mean "trust this." It means "this is private." You may be having a private conversation with Satan.
- Scott Hanselman
If you are producing
#infosec
training content please remember that anyone can buy a certificate for a website, including the criminals! HTTPS or 🔒does not mean site is trustworthy / legitimate. This tweet is mainly aimed at content vendors who still include incorrect advice.
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Programmer 1: "We have a problem"
Programmer 2: "Let’s use RegEx!"
Programmer 1: "Now we have two problems"
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Why do software developers always say 'it works on my machine'?
It's a regular expression.
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Facebook will release a mail client.
Emails will be flagged as "Mark has read"
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If you can't afford security you can't afford a data breach
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BREAKING NEWS: password reuse leads to account compromise.
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Who needs zero-days when people keep reusing crap passwords
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WE TAKE YOUR SECURITY SERIOUSLY.
ⓘ 𝗢𝗳𝗳𝗶𝗰𝗶𝗮𝗹 𝘀𝗼𝘂𝗿𝗰𝗲𝘀 𝘀𝘁𝗮𝘁𝗲 𝘁𝗵𝗶𝘀 𝗶𝘀 𝗳𝗮𝗹𝘀𝗲 𝗮𝗻𝗱 𝗺𝗶𝘀𝗹𝗲𝗮𝗱𝗶𝗻𝗴
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Criminals don’t give a fuck that you planned to roll out 2fa for your AD accounts next month
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Someone just called, sneezed and then hung up.
I am getting sick and tired of these cold calls.
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The cloud is someone else's computer but it's still your responsibility to secure it.
#infosec
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Regular reminder:
Your smartphone is the entry point to your digital life.
Secure it properly.
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The data of your customers that you don't collect and store cannot be stolen from your systems.
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I incidentally pressed F12 on a government website.
What now?
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If Facebook buys Gmail, instead of 'mark as read' the feature will be called ‘Mark has read'.
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If you care about your kids' privacy and security
DONT
- put IoT devices (webcams, baby monitors,...) in their bedroom or anywhere near them
- let them wear tracking devices like smartwatches
- share images/videos on social media that might harm them (later)
Please!
#Infosec
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Two database admins walked into a NoSQL bar.
A little bit later they walked out because they couldn’t find a table.
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encoding != encryption != hashing
You can decode, decrypt but there's no such thing like "dehashing". Hashing algorithms are one-way irriversible algorithms. Hashes can be cracked.
#Infosec
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“We have no reason to believe customer data has been affected” in a data breach notice just means “We have no clue whether customer data has been affected”.
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My password is "snowwhiteandthesevendwarves"
because they said I needed 8 characters.
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I've been using Vim for 5 years...
Mainly because I don't know how to exit it.
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Security by absence: you can’t get hacked through what you don’t have.
- Only create accounts you really need
- Only install software you really need
- regularly revise your software, accounts & 3rd party apps that have access to them and remove what you no longer use
#Infosec
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My password has been hacked.
That's the third time already that I needed to change my daughter's date of birth.
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