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Author Archives: Abdul

What are the chances that authorities spy people’s devices?

Posted on December 31, 2019 by Abdul

I wanted to figure out whether authorities can potentially, not in terms of whether they are allowed to, spy on people’s smartphone activities such as e-mail, Whatsapp chats, and so on.

I don’t mean the FBI or NSA technique… Continue reading What are the chances that authorities spy people’s devices?→

Posted in smartphone, spyware

How to prevent sim swap to the most extent possible

Posted on November 2, 2019 by Abdul

There’s a technique called sim swap, which enables a fraudster to transfer the victim phone number to an other sim, allowing a fraudster hence to read the messages but especially to empty out their bank account by recovering … Continue reading How to prevent sim swap to the most extent possible→

Posted in simcard

How can 2FA be bypassed if I set a number which is unknown to everybody?

Posted on October 25, 2019 by Abdul

I’m asking about the risks one may face for setting 2FA using their own phone number as second step of a 2FA, in scenarios such as, for example, logging in a bank account page with 2FA that provides only that type of protect… Continue reading How can 2FA be bypassed if I set a number which is unknown to everybody?→

Posted in authentication, multi-factor

How to remove development tool on debian server

Posted on July 12, 2019 by Abdul

I am a newbie and I have read this post

https://security.stackexchange.com/questions/12113/installing-development-tools-on-production-server-security-risk

I have installed build-dep and other development tools on debian se… Continue reading How to remove development tool on debian server→

Posted in debian

Wp-cli problem, setup allow_url_fopen and open_basedir in php.ini

Posted on March 4, 2019 by Abdul

I have to set up allow_url_fopen = Off and open_basedir = /my-wp-site/

But I cannot use wp-cli if I do that.

Any solution please?

Continue reading Wp-cli problem, setup allow_url_fopen and open_basedir in php.ini→

Posted in PHP, wordpress

MAC filtering the internet traffic?

Posted on March 12, 2017 by Abdul

I was trying to build a firewall where in the access to my LAN from internet should be allowed only if it matches the predefined MAC address of the device i.e,. MAC filtering, but later i found out that MAC filtering is not p… Continue reading MAC filtering the internet traffic?→

Posted in filtering, firewalls, iptables, mac-address

Can i obtain the encrypted value back once it is Hashed?

Posted on January 22, 2017 by Abdul

Assume:

Sender encrypts the plain text and gets some output (say XYZ).
Sender applies hash on XYZ and get an output (say 0123456).
Then sender encrypt this hash output (0123456) with senders private key and send the file to… Continue reading Can i obtain the encrypted value back once it is Hashed?→

Posted in Cryptography, encryption, hash

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