Posts published in “Techniky hackerů”

Videokurz Digitální Sebeobrany

Published 15. 3. 2021

Série videí o soukromí a bezpečnosti v digitálním prostoru.

0-day vulnerability in WhatsApp

Published 15. 5. 2019

0-day vulnerability in WhatsApp

WhatsApp (owned by Facebook) has released an update that patches the vulnerability that allowed attackers to install malicious software.

Be careful with Chrome on your Android phone

Published 6. 5. 2019

New type of attack uses the features of Chrome on Android phones, which hide the address bar when the user scrolls the page down. The address will reappear when you…

Brute-force attack – demo

Published 19. 12. 2018

Brute-force attack – demo

Jak funguje tzv. brute-force útok? Můžete si ho vyzkoušet.

Try the simple hacker’s trick

Published 11. 12. 2018

Try the simple hacker’s trick

One of the attackers’ goals is to deceive the user in such a way that he runs a malicious program on his own computer. Today, most common users know that…

38% of users use the same password for two different services.
21% of users only modify an existing password for a different service.
12% of users generates passwords.
1.2% of users have unique passwords for different services.
0.004% of users use unique generated passwords for different services.
70% of users use leaked passwords for additional services for at least 1 year.
40% of users have used leaked passwords for additional services for more than 3 years.
Passwords with the same base can be algorithmically found in 30% of cases in 10 attempts (or 46.5% of cases in 100 attempts).
In 87% of cases, users modify the end part of the password.
In 11% of cases, users modify the beginning part of the password.
85% of e-shop users have the same or modified passwords on other e-shop accounts
62% of mail server users have identical or modified passwords on other email services.