Using any of them to send official papers is still not a smart idea. The messaging program Signal gained a lot of attention in March because many White House officials, including Vice President JD Vance, used it to discuss a military action in Yemen with one another (and, incidentally, a journalist). Even if you shouldn’t discuss government actions like these on Signal or any other encrypted messaging service, it is one of the most privacy-focused messaging apps available to the general public.
Encrypted messaging apps offer end-to-end encryption, which ensures your messages aren’t readable to anyone besides their intended recipient. Some other chat apps such as Google Messages and iMessage also provide end-to-end encryption, but these apps generally require you to be using a specific mobile platform (iOS or Android).Although encrypted RCS messaging may eventually be available on iOS and Android, you can now interact with individuals on any platform by using encrypted messaging applications like Signal, Telegram, and WhatsApp.
Signal has the strongest privacy safeguards out of the three. The key differences between these applications are what information they gather and how transparent they are; Signal is superior to Telegram and WhatsApp. However, keep in mind that phishing and other similar attacks may compromise even applications with strong security standards and privacy rules, so it’s crucial to remain on guard no matter which messaging app you use.
What you should know about these encrypted texting applications is as follows.
only gathers your phone number.
Several privacy features on the device
Open-source software supported by the charity Signal Foundation
Signal is suggested by publications including The Guardian, The Wall Street Journal, and The Washington Post as a safe way to communicate with their correspondents. And with good cause. All of your communications are encrypted, including group messaging, chats, and phone conversations. Instead of using a static key for encryption, it employs Forward Secrecy to encrypt each message using a unique key. This implies that a person would need to discover a new key in order to read a second message, even if they managed to obtain an encrypted message and decrypt the first one.
Compared to the other messaging applications on our list, and perhaps the majority of apps, Signal gathers the least amount of personal information about you. All this software does is get your phone number. Nothing more. Although it is linked to your phone number, Signal does have access to the date of account creation and the most recent time you connected to its servers. Having an account is not necessary, although you may provide the app extra details if you’d like.
Signal has already been subpoenaed by government organizations for user data. Signal hasn’t been able to offer specific user information for these requests, although other applications might be able to. There isn’t much information to work with because the program can only tell you when an account was created and when it last linked to its servers.
Signal can’t sell, rent, or monetize your data like other applications since it can’t access it. Rather, the nonprofit Signal Foundation provides funding for Signal. According to the most current statistics available, ProPublica reports that contributions and grants accounted for the majority of the foundation’s financing in 2023, which totaled to almost $22.7 million. Major contributors do support Signal, as reported by Reuters in 2022 when Twitter co-founder Jack Dorsey declared he would give the organization $1 million year.
You can take control of your privacy using Signal’s on-device safeguards. To prevent your contact from learning your IP address, you may configure the app to erase messages after a predetermined period of time, such as 30 seconds, and route your calls through a Signal server. Additionally, the software makes it simple to utilize a proxy address in order to access Signal if, for whatever reason, you are unable to connect to the service via your Wi-Fi or mobile data in your region or nation.
Another unusual feature on this list is that Signal is open-source. This implies that anybody may view and examine the code that powers Signal and make sure the application is operating as intended.Given Signal’s lofty claims about what data it collects and doesn’t, as well as its level of privacy, this is significant. However, this guarantees that Signal is keeping its word and enables users to criticize the software if it behaves inappropriately.
Signal is the obvious option for safe, private messaging and phone conversations when all those factors are taken into account.
Signal is available for free download from the Google Play Store or the Apple App Store.
A hybrid of a message board and a messaging app
may gather your information; only end-to-end encrypted secret talks
provides a premium tier with additional features.
Although Telegram lacks Signal’s extensive privacy safeguards, it does contain a few features that may appeal to some users.
Telegram is a messaging app that runs on the cloud and keeps the data it needs to work. Additionally, Telegram states that it gathers and keeps certain of your metadata, such as IP addresses. In 2024, the business amended its privacy statement to state that it will provide law enforcement with some of your data upon request.
“We’ve made it clear that the IP addresses and phone numbers of those who violate our rules can be disclosed to relevant authorities in response to valid legal requests,” Pavel Durov, Telegram’s CEO, posted in September.
With that change in place, Telegram fulfilled 900 requests for information from US authorities in 2024, impacting 2,253 people, according to Telegram’s own in-app transparency report.
If the possibility of Telegram giving your data to law police wasn’t worrisome, the business has had data breaches in the past that have allowed that information to get into the wrong hands. For instance, the online data of around 42 million Iranian Telegram users was compromised in 2020. Chinese agencies used a Telegram bug in 2019 to reveal the identity of demonstrators in Hong Kong.
If you’re still interested in Telegram, one of its main advantages over other messaging applications like Signal is that, like Discord, it can serve as a message board for big groups of people. It provides public channels that broadcast news on sports, video gaming, and other topics.For instance, you may view posters and trailers for upcoming films and TV series on the @entertainment channel.
Nevertheless, such public routes are not end-to-end encrypted. While Telegram claims that all content submitted in public groups and channels is encrypted during storage and transmission to its servers, everyone on Telegram may access these public channels without the need for an encryption key. Therefore, your posts on that channel are essentially public knowledge if you are the owner or administrator.
End-to-end encryption is available in Telegram’s secret chats, but there is a catch. These conversations are limited to the devices of origin, which is your phone.
“This way you can always be sure that they are safe for as long as your phone is safe in your pocket,” explains Telegram.
However, this also implies that Telegram’s desktop and browser versions do not support secret chats. Therefore, it is possible for someone who is not the intended recipient to intercept and read such conversations.
In contrast to Signal, which allows you to schedule messages to be deleted after minutes or even seconds, Telegram only allows you to pick a one-day timeframe for automated message deletion.Additionally, Telegram has an intriguing self-destruct option that can erase your contacts, messages, and account after a predetermined period of inactivity, which can range from one to 24 months.
CNET Senior Editor Moe Long stated that open-source applications may offer transparency and enable users to examine code for weaknesses. Telegram’s client apps, such as Signal, are open-source. But according to a 2021 article by Durov, the server codes aren’t open source.
“You don’t even need the server-side code to check the integrity of Secret Chats — they are solid regardless of how the servers function (that’s the whole point),” noted the author. The company’s cloud servers are encrypted, according to Telegram’s privacy policy, and “the encryption keys in each case are stored in several other data centers in different jurisdictions,” which means that staff members at any given data center lack the knowledge necessary to encrypt the data there.
Closed-source server code is frequently used for security, intellectual property, and other reasons. You are still putting your faith in the business to safeguard the data stored on those servers, though. Even while audits can only record such information at a single point in time, a third-party audit might assist strengthen that confidence by verifying that the data centers operate as planned.
According to Long, since messages stay safe until they are decoded on the recipient’s device, Telegram’s end-to-end encryption helps to some extent offset the company’s closed-source server code. However, your data may not be completely protected.
“Even with end-to-end encryption, some metadata could be collected,” Long stated.
Although Telegram is free, users who want access to more capabilities can upgrade to a premium tier, which costs $5 per month or $36 annually. Unlimited cloud storage, animated emoticons, and the absence of advertisements in public Telegram channels—yes, there are advertisements in public channels with more than 1,000 subscribers—are a few of these benefits.
Telegram is an excellent substitute for services like Discord, which only provides end-to-end encryption for audio and video conversations, due to its selective encrypted messaging and larger-scale chats. Be wary, though, since some of your data is still being captured when you are not utilizing hidden conversations. Telegram is available for free download from the Google Play Store or the Apple App Store.
The most popular messaging app uses the same encryption technique as Signal
gathers a ton of personal info
Free, but Meta owns and runs it
According to Exploding Topics, WhatsApp is the most widely used private messaging service on this list, with around 2 billion monthly users. Because WhatsApp is so widely used, it’s more likely that the people you’re conversing with have it, which means that your conversations can be encrypted. Additionally, your conversations may not be encrypted if the other person you are speaking with does not have WhatsApp or any of the other messaging applications on this list.
Your calls and conversations are exactly as end-to-end encrypted on WhatsApp as they are on Signal since it employs the same encryption technology. However, the primary difference between WhatsApp and Signal is that, even when compared to Telegram, WhatsApp gathers a lot more user data.
WhatsApp claims that when you use the app, it automatically gathers data from you, including cookies, device and connection information, use and log information, and location data. Additionally, WhatsApp might get information about you from other users on the app.
“When other users you know use our Services, they may provide your phone number, name, and other information (like information from their mobile address book) just as you may provide theirs,” the privacy policy for WhatsApp states.
This implies that your data may still get into WhatsApp’s hands through a friend or family, even if you don’t use the program frequently and only use it to talk with them abroad once every few months.
Given that Meta owns the app, I suppose it shouldn’t come as a surprise that it gathers so much personal information about you. According to a 2024 report submitted by the Federal Trade Commission, Meta and other businesses have “troves of data, including information from data brokers and about both users and nonusers of their platforms.”
“These surveillance practices can endanger people’s privacy, threaten their freedoms and expose them to a host of harms, from identity theft to stalking,” Lina Khan, then-FTC Chair, warned.
Concerns have been raised by some regarding WhatsApp’s data security. Although this is a weakness of various messaging applications rather than a unique flaw in WhatsApp, The Intercept revealed in 2024 that governments would be able to exploit the limits of secure messaging apps by doing traffic analysis. Nearly 500 million WhatsApp users’ phone details were exposed, according to a 2023 CyberNews article. The Check Point Research team was unable to verify that the numbers belonged to WhatsApp users, though.
“WhatsApp has no backdoors and we have no evidence of vulnerabilities in how WhatsApp works,” a WhatsApp representative emailed CNET to say. “We’ve fought to hold bad actors accountable and have a track record of resolving issues that we detect. The world’s top engineers are actively working to strengthen our systems against potential attacks, and we will keep doing so.” Additionally, the spokesman stated that WhatsApp does not maintain records of who calls or messages users.
Once more, no program is completely safe, but those are some concerning tales combined with the amount of personal information WhatsApp may gather about you. The information WhatsApp gathers about you is a genuine gold mine of information that others are trying to obtain, even if your messages may be private and unreadable by anybody other than the intended receiver.
WhatsApp continues to be the most widely used encrypted messaging software worldwide in spite of the data gathering. Therefore, you should try to persuade the person you wish to speak with to use Signal if they have WhatsApp and an unprotected messaging app.
WhatsApp is available for free download from the Google Play Store or the Apple App Store.
This article is intended for general informational and educational purposes only. It does not constitute legal, security, or privacy advice, nor does it endorse or discredit any individual, organization, or product. All statements and opinions expressed are based on publicly available information and personal interpretations at the time of writing.
Mentions of specific companies, organizations, individuals, or events (including government agencies and public figures) are presented solely to provide context and do not imply any official connection, approval, or association. While we strive to ensure accuracy, we do not guarantee that all content is current or complete.
Users are encouraged to do their own research and consult official documentation or qualified professionals before making decisions regarding the use of encrypted messaging applications or data security practices.
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