How much does it take to hack a mobile network?
Is electronic government secure
in the era of WikiLeaks and Anonymous?

Is SCADA hacking a Hollywood fiction
or the nowadays reality?
Internet banking: is there any chance to win
over the fraudsters?

Cyber-crimes, cyber-espionage, cyber-war: where do we draw a borderline?


Monday, July 30, 2012

'Free-of-Charge' Tariff. Hacking Coin-Operated Telephone at PHDays

Due to the fact that Positive Hack Days is a forum devoted to the issues of practical IT security, the competitive program contained competitions of practical nature (for example, a contest related to searching information hidden in the Internet and hash cracking).

One of the competitions, where not only your head but hands could work, was a contest named 2600, in the course of which the participants had an opportunity to demonstrate their skills in phreaking and to hack a coin-operated telephone. Any visitor of Positive Hack Days could partake in the competition. The participants were to call a predefined number from a coin-operated telephone using tokens as the means of payment and then extract the used token and give it back to the organizers.

Everyone could get ready for the competition by reading this excellent blog post [RU].

To make this contest possible, an old payphone made in 1990s was bought. It did not work properly – a connection could be established without coins. To fix it, we screw a coin-box, compatible with modern coins in the denomination of two Russian rubles, onto the device.

We had to connect the telephone to an office telephone switch to check its workability – everything functioned perfectly. Then we bought a very simple telephone switch to make the coin-operated telephone work properly during the forum as well and connected these two devices on the platform of the Digital October Center.

The participants were provided with special tokens with PHDays symbols and a small hole. The PHDays token weighed as a coin in denomination of two Russian rubles.

A beautiful model was sitting next to the telephone at the forum to explain the contest rules and technical details of freaking as it is done in Russia. Her assistance was especially useful when foreign participants of the forum studied the strange device and tried to understand why a blue box did not work upon pulse dialing. Of course, there always was a crowd of people wishing not only to participate in the competition but to chat with the beauty as well :)

The winners received prizes and gifts – everything as it should be done :)The competition aroused much interest and was even covered on CNewsTV [RU]:

The 2600 competition will be certainly held at Positive Hack Days next year!


  1. Talking about hacking, I must confess that I know how to track someone's phone without them knowing. Just read and you will know this, too.

    1. Hi after reading your blog I have finally found some knowledge which
      I was looking for so long for that reason Thanks..

      سیاوش قمیشی

  2. Wow actually i loved your blog man..Thanks for sharing awesome content..

  3. Hi after reading your blog I have finally found some knowledge which
    I was looking for so long for that reason Thanks..

  4. Any translation apps or tools for biblical texts? I know there are alternative grammar apps and online translators, but I need something for my Religious Studies course. One of the articles I used to write my essay today is Biblical Theology by Reformed Theological Seminary PhD David Frame. The professor wants to adopt some ideas from other countries like universal healthcare and free or cheap college. The professor doesn't want to give everyone the same income like a traditional socialist. It's sad that you can't research him and determine this on your own. I've followed him since 2016, he is one of very few educators out there fighting for the American students' rights.

  5. We are the best writing company providing Writing Service Online papers over 15 years, we have been operational as we have assisted thousands of students with their Pre Written Research Paper.

  6. Due to the fact that Positive Hack Days is a forum devoted to the issues of practical IT security, the competitive ... login

  7. Nice post! Thank you for posting. I used to buy custom research papers online. I hate writing tasks. For this reason I use research paper writing services.

  8. Trend Micro is the popular antivirus program available in the Market that protects your device from Dangerous Viruses and Unauthorized Access. It is compatible with multiple devices like PC, Mac, Smartphones, windows, and laptop. Trend Micro Antivirus+ Security is excellent malware protection, especially against ransomware. It includes additional protections with its Pay Guard feature, spam filters, and safe browsing tools.

  9. I visited your website today and found it very interesting and well done.

    Industrial Cleaning Service Hickory

  10. Memory foam, cool gel foam, Bonnell spring, and hybrid mattresses are the most comfortable mattresses. How to find best matress?

  11. This gadget is very useful for students, and they can get benefits through it. I think, this is a positive step towards success in education field. Assignment writing services.


  12. I am actuaⅼly ԁelighted to read tһis webpage posts wһich includes tons of valuable facts, thanks for provіding such statistics.
    Thanks for sharinhg!

  13. Thank you for sharing this excellent post with us glad to see this kind of positive info you are so good and amazing with your work nice keep it up.
    Pay For Essay Online
    Essay writing price
    How to Find a Legitimate Write My Essay Website
    Can I Hire Someone To Write My Essay

    I was searching for up to date advice on this subject for a few days.
    Now I’m satisfied as I have finally reached your post.

  14. - McAfee LiveSafe 2020 Crack: It is powerful and all-in-one security software. Furthermore, it offers all kinds of protection for digital systems such as Mac OS and Windows PC. So, it prevents your PC from many attackers as well as online Moreover, it assists to secure smart-phone and tabs from virus attacks. Redeem and activate McAfee using the activation code on In case you're a current user, again activate the account by navigating to

  15. We appreciate it and continue your great work! Very informative and helpful these days.

    Painters In Sherwood Park

  16. We have a big family of write my essay
    today who have a vast understanding of the English language and rules related to it. All of them are holding higher degrees with distinctions in their respective fields. Our highly professional writers are experts in writing styles such as MLA, Harward, APA, etc. They know how to structure an essay or write my essay for me research paper by following the rules of the English Language.

  17. There are so many facets about this profession,assignment for mba students about being a chef my partner and The thrill a person knows whether he's an athlete, or into business or whatever job.

  18. It did not work properly – a connection could be established without coins. To fix it, we screw a coin-box, compatible with modern coins in the denomination of two Russian rubles, onto the device.

  19. Hey! I was just exploring and came across your site. The articles and blogs were quite interesting to read. I am from technological field. If someone is interested to read about Antivirus software, then do visit my site or

  20. We are really grateful for your blog post카지노사이트 for giving a lot of information

  21. Nice one! Thank you for sharing this post. 바카라사이트Your blog posts are more interesting and impressive.

  22. This is one of the best website I have seen in a long time thank you so much.

  23. Your blog is really nice. Its sound really good

  24. It's remarkable that you have actually published a best post on this neighborhood. You're a guy of terrific capability. I'm attempting so difficult to have this composing capability like you. Provide me some suggestions. You'll be my educator. 카지노사이트

  25. I have actually gone to many internet sites yet I have actually never ever seen such a fantastic web site. Your writing is so ideal. Exactly how can I make such an excellent message? Let me recognize just how. I assume I can have a good day thanks to your writing.