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Over Dozen Popular Email Clients Found Vulnerable to Signature Spoofing Attacks

Over Dozen Popular Email Clients Found Vulnerable to Signature Spoofing Attacks

April 30, 2019Swati Khandelwal
A team of security researchers has discovered several vulnerabilities in various implementations of OpenPGP and S/MIME email signature verification that could allow attackers to spoof signatures on over a dozen of popular email clients. The affected email clients include Thunderbird, Microsoft Outlook, Apple Mail with GPGTools, iOS Mail, GpgOL, KMail, Evolution, MailMate, Airmail, K-9 Mail, Roundcube and Mailpile. When you send a digitally signed email, it offers end-to-end authenticity and integrity of messages, ensuring recipients that the email has actually come from you. However, researchers tested 25 widely-used email clients for Windows, Linux, macOS, iOS, Android and Web and found that at least 14 of them were vulnerable to multiple types of practical attacks under five below-mentioned categories, making spoofed signatures indistinguishable from a valid one even by an attentive user. The research was conducted by a team of researchers from Ruhr University Bochum and
GnuPG Flaw in Encryption Tools Lets Attackers Spoof Anyone's Signature

GnuPG Flaw in Encryption Tools Lets Attackers Spoof Anyone's Signature

June 15, 2018Swati Khandelwal
A security researcher has discovered a critical vulnerability in some of the world's most popular and widely used email encryption clients that use OpenPGP standard and rely on GnuPG for encrypting and digitally signing messages. The disclosure comes almost a month after researchers revealed a series of flaws, dubbed eFail , in PGP and S/Mime encryption tools that could allow attackers to reveal encrypted emails in plaintext , affecting a variety of email programs, including Thunderbird, Apple Mail, and Outlook. Software developer Marcus Brinkmann discovered that an input sanitization vulnerability, which he dubbed SigSpoof , makes it possible for attackers to fake digital signatures with someone's public key or key ID, without requiring any of the private or public keys involved. The vulnerability, tracked as CVE-2018-12020 , affects popular email applications including GnuPG, Enigmail, GPGTools and python-gnupg, and have now been patched in their latest available so
Here's How eFail Attack Works Against PGP and S/MIME Encrypted Emails

Here's How eFail Attack Works Against PGP and S/MIME Encrypted Emails

May 14, 2018Swati Khandelwal
With a heavy heart, security researchers have early released the details of a set of vulnerabilities discovered in email clients for two widely used email encryption standards—PGP and S/MIME—after someone leaked their paper on the Internet, which was actually scheduled for tomorrow. PGP and S/MIME are popular end-to-end encryption standards used to encrypt emails in a way that no one, not even the company, government, or cyber criminals, can spy on your communication. Before explaining how the vulnerability works, it should be noted that the flaw doesn't reside in the email encryption standards itself; instead, it affects a few email clients/plugins that incorrectly implemented the technologies. Dubbed eFail by the researchers, the vulnerabilities, as described in our previous early-warning article , could allow potential attackers to decrypt the content of your end-to-end encrypted emails in plaintext, even for messages sent in the past. According to the paper released
5 Things Google has Done for Gmail Privacy and Security

5 Things Google has Done for Gmail Privacy and Security

March 29, 2016Unknown
Over the past few years, Google has increasingly improved the online security and protections of its Gmail users. Besides two-factor authentication and HTTPS, Google has added new tools and features to Gmail that ensures users security and privacy, preventing cyber criminals and intelligence agencies to hack email accounts . 1. Enhanced State-Sponsored Attack Warnings Apple vs. FBI case urged every company to beef up the security parameters to prevent their services from not just hackers but also the law enforcement. Google for a while now has the capability to identify government-backed hackers , and notify potentially affected Gmail users so they can take action as soon as possible. Google recently announced on its blog post that it will alert Gmail users about the possibility of any state-sponsored attack by showing them a full-page warning with instructions about how to stay safe — very hard to miss or neglect. Meanwhile, the company revealed that ove
Cryptography Expert Says, 'PGP Encryption is Fundamentally Broken, Time for PGP to Die'

Cryptography Expert Says, 'PGP Encryption is Fundamentally Broken, Time for PGP to Die'

August 19, 2014Wang Wei
A Senior cryptography expert has claimed multiple issues with PGP email encryption - an open source end-to-end encryption  to secure email. Before continuing, I would like to clarify that covering this topic doesn't mean you should stop using PGP encryption , instead we are bringing to you what Security researcher has argued about its fundamental implications.  PGP or Pretty Good Privacy , a program written in 1991, uses symmetric public key cryptography and hashing that allow both Privacy and Security , as well as Authenticity . Privacy and Security ensure users to exchange messages securely and Authenticity proves the origin of those messages. But PGP is a complicated multi-step process, which requires users to keep track of the public keys of other users in order to communicate. Despite clumsiness of the PGP implementation, the popular Internet giants such as Google and Yahoo! have looked forward to integrate it into their popular email services. A respected research profes
Google offers Chrome Extension for End-To-End Gmail Encryption

Google offers Chrome Extension for End-To-End Gmail Encryption

June 04, 2014Swati Khandelwal
Everything we do online, whether chatting on phone, talking via video or audio, sending messages on phones or emails are being watched by Governments and Intelligence agencies. However, many Internet giants offer encrypted environment in an effort to protect our online data from prying eyes, but still those companies can read our data stored into their servers. But, there is a great news for Gmail users. On Tuesday, Google has announced two major privacy enhancements in its Gmail and this new push for its email service will even protect our data and communication from Google itself. With the ongoing concerns about privacy and the pervasiveness of email communications, Google already provides encryption for its Gmail called Transit encryption (HTTPS). In which only the transmission of emails sending or receiving is protected by the transit encryption but not the content of the email. Few Months back, Google itself admitted that their automated systems read our email c
Google Working On End-to-End Encryption for Gmail Service

Google Working On End-to-End Encryption for Gmail Service

April 22, 2014Swati Khandelwal
Constant password breaches and Snowden revelations about Government Surveillance have raised many questions that why don’t cloud and email Services encrypt the data stored on their server?  Revelations forced the popular Internet Giants such as Google and Yahoo to contemplate on the privacy and security issues and in response companies started enhancing their encryption standard by enabling HTTPS by default and removed the option to turn it off. A few days back, Google admitted that their automated systems read your content, including incoming and outgoing emails to provide you personally relevant advertisements. That means Internet giants generally do encrypt your data, but they have the key so they can decrypt it any time they want. Encryption is mandatory in Modern Internet and web services should consider Encrypting and decrypting your data locally, so that no one can snoop on. Such cryptographic mechanism is called End-to-End Encryption , that means content of yo
How to use PGP encryption with Mozilla Thunderbird Email client

How to use PGP encryption with Mozilla Thunderbird Email client

January 13, 2014Anonymous
In my last article, we have learnt that how to encrypt our Emails using Gnu Privacy Guard . Previously we used Microsoft Outlook as a desktop mail client and a GpgOL plugin to handle encryption decryption of our communication. Since Microsoft is a US-based company, that has to follow all the laws of that contingent. Should we trust Microsoft product to save our e-mail password and data? Obviously NO!  This made me write a new article on the same topic is that today we are going to use an open source mail client i.e.  Mozilla Thunderbird , available for Windows, Mac OS X and Linux. Thunderbird Installation: Initially you need to download the Thunderbird mail client, and install it to make your email communication more secure and private. Open Thunderbird tool and configure your mail account, as shown: Installing and Configuring ENIGMAIL:  In the next step you need to install an Add-on in Thunderbird, called  ENIGMAIL . You can search and install add-on using Tools-> Add-ons
What Is PGP Encryption And How To Encrypt Your Emails

What Is PGP Encryption And How To Encrypt Your Emails

January 08, 2014Anonymous
Now that we have enough details about how the NSA's Surveillance program, running for a long time against almost each country of this planet.  Hundreds of top-secret NSA documents provided by whistleblower Edward Snowden already exposed that Spying projects like PRISM and MUSCULAR are tapping directly into Google and Yahoo internal networks to access our Emails. NSA's tactics are even capable to defeat the SSL encryption, so unsecured email can easily be monitored and even altered as it travels through the Internet. One major point on which all of us are worrying is about the privacy of communication among each other and If you're looking for a little personal privacy in your communications you will need to encrypt your messages. To avoid privacy breaches; rather I should say to make it more difficult for the NSA or British GCHQ surveillance program to read our communication, we should use PGP encryption (Pretty Good Privacy). Why we should Encrypt ou
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