38 Years of the Digest ... founded August 21, 1981
Copyright © 2019 E. William Horne. All Rights Reserved.

The Telecom Digest for Sun, 26 Jan 2020
Volume 39 : Issue 26 : "text" format

Table of contents
Re: Does anyone remember this payphone trick?Jay Hennigan
How to FBI-proof your encrypted iPhone backupsMonty Solomon
The Crime-Fighting App That Caused a Phone-Hacking Scandal in ItalyMonty Solomon
Please send posts to telecom-digest.org, with userid set to telecomdigestsubmissions, or via Usenet to comp.dcom.telecom
The Telecom Digest is made possible by generous supporters like Dave Garland
---------------------------------------------------------------------- Message-ID: <2020012413335386529-nobody@example.com> Date: 24 Jan 2020 13:33:53 -0800 From: "Jay Hennigan" <nobody@example.com> Subject: Re: Does anyone remember this payphone trick? On 2020-01-22 19:12:40 +0000, Naveen Albert said: > Technically, the dial tone provided by a COCOT is not from the CO. The > COCOT plays its own dial tone and completes the call once a number is > dialed. COCOTs don't let you get at the CO dial tone. You can hear the > DTMF digits in the background once you've dialed the number and > inserted the proper deposit. 0 and star numbers are also programmed > to toll-free numbers. The COCOT itself is programmed to call home to > the payphone provider every couple of days or so. > > There are a number of ways I've discovered in the past few years that > make it possible to phreak COCOTs, too, particularly PTS ones, but > they're not nearly as exciting as the old ways. > > I'm currently putting the finishing touches on virtual coin trunks for > coin-first, post-pay (WECo and AE) and dial-tone first pre-pay > operation. Surprised by how well they work, but also appreciative of > just how many moving components there are with real trunks and how > they operate together! Another strange thing about many COCOTs is that the DTMF digits played to the handset were scrambled while making the call. They sound like real DTMF tones, but the digits heard in the handset don't match the digits dialed. Calls completed as expected, but the audible feedback was rather confusing espeically when calling a familiar number. Do you know why this was done? I can't think of a valid reason. Once the call completed, the actual dialed digits would be played both over the line and through the handset. Things like voicemail, IVR, etc worked as expected. ------------------------------ Message-ID: <BE36388D-DCDB-48CB-9B53-52E7D42F8055@roscom.com> Date: 23 Jan 2020 14:44:58 -0500 From: "Monty Solomon" <monty@roscom.com> Subject: How to FBI-proof your encrypted iPhone backups How to FBI-proof your encrypted iPhone backups By Barbara Krasnoff If you're an iPhone user who is steadfast about retaining your privacy, you're probably not very happy about the recent news that Apple is retaining the ability to decrypt most of what's in an iCloud backup at the request of government entities, such as the FBI. In that case, you may want to pay attention to the adage that sometimes the best ways are the old ways. While it's more convenient to use iCloud to back up your phone, you can back up your iPhone to your Mac or Windows computer and retain full control of your data backups. https://www.theverge.com/2020/1/23/21076813/back-up-iphone-computer-how-to-mac-pc-icloud-data-fbi-encryption ------------------------------ Message-ID: <723DB433-322B-4A6A-8ABD-8443D8048D2F@roscom.com> Date: 25 Jan 2020 13:10:23 -0500 From: "Monty Solomon" <monty@roscom.com> Subject: The Crime-Fighting App That Caused a Phone-Hacking Scandal in Italy The Crime-Fighting App That Caused a Phone-Hacking Scandal in Italy ESurv employees allegedly spied on unwitting Italian citizens. By Ryan Gallagher January 16, 2020 https://www.bloomberg.com/news/features/2020-01-16/the-crime-fighting-app-whose-developers-allegedly-went-rogue ------------------------------ ********************************************* End of telecom Digest Sun, 26 Jan 2020
Helpful Links
Telecom Digest Archives The Telecom Digest FAQ