Telegram is a messaging app with a focus on speed and security, it’s super-fast, simple and free. You can use Telegram on all your devices at the same time — your messages sync seamlessly across any number of your phones, tablets or computers. Telegram has over 500 million monthly active users and is one of the 10 most downloaded apps in the world. With Telegram, you can send messages, photos, videos and files of any type (doc, zip, mp3, etc), as well as create groups for up to 200,000 people or channels for broadcasting to unlimited audiences. As a result, Telegram is like SMS and email combined — and can take care of all your personal or business messaging needs. Business users and small teams may like the large groups, usernames, desktop apps and powerful file sharing options.

Since Telegram groups can have up to 200,000 members, we support replies, mentions and hashtags that help maintain order and keep communication in large communities efficient. You can appoint admins with advanced tools to help these communities prosper in peace.

Public groups can be joined by anyone and are powerful platforms for discussions and collecting feedback. And if you want secrecy, try our device-specific Secret Chats with self-destructing messages, photos, and videos — and lock your app with an additional passcode. As a result, you can access your messages from several devices at once, including tablets and computers, and share an unlimited number of photos, videos and files (doc, zip, mp3, etc.).

Telegram needs less than 100 MB on your device – you can keep all your media in the cloud without deleting things – simply clear your cache to free up space. We also have a Bot API, a platform for developers that allows anyone to easily build specialized tools for Telegram, integrate any services, and even accept payments from users around the world. Just use your main mobile phone number to log in everywhere, your cloud chats will sync instantly.

Pavel supports Telegram financially and ideologically while Nikolai's input is technological. To make Telegram possible, Nikolai developed a unique custom data protocol, which is open, secure and optimized for work with multiple data-centers. Most of the developers behind Telegram originally come from St. Petersburg, the city famous for its unprecedented number of highly skilled engineers.

The Telegram team had to leave Russia due to local IT regulations and has tried a number of locations as its base, including Berlin, London and Singapore. We’re currently happy with Dubai, although are ready to relocate again if local regulations change.

While Telegram will introduce monetization in 2021 to pay for the infrastructure and developer salaries, making profits will never be an end-goal for us. Telegram's aim is to create a truly free messenger, with a revolutionary privacy policy.

Since taking back our right to privacy was the reason we made Telegram, there wasn't much we had to change. For example, your cloud chats – so that you can access them from any devices without using third-party backups, or your contacts – so that you can rely on your existing social graph when messaging people on Telegram. If you find sticker sets or bots on Telegram that you think are illegal, please ping us at [email protected] You can also use the 'report' buttons right inside our apps, see this post on our official @ISISwatch channel for details.

If you see a bot, channel, or sticker set that is infringing on your copyright, kindly submit a complaint to [email protected] To do this in the places where it is most needed (and to continue distributing Telegram through the App Store and Google Play), we have to process legitimate requests to take down illegal public content (e.g., sticker sets, bots, and channels) within the app.

For example, we can take down sticker sets that violate intellectual property rights or porn bots. User-uploaded stickers sets, channels, and bots by third-party developers are not part of the core Telegram UI. For example, if criticizing the government is illegal in some country, Telegram won't be a part of such politically motivated censorship. If you think we banned your bot, channel, or sticker set for no apparent reasons, drop us a line at [email protected]

The relevant decryption keys are split into parts and are never kept in the same place as the data they protect. As a result, several court orders from different jurisdictions are required to force us to give up any data.

Thanks to this structure, we can ensure that no single government or block of like-minded countries can intrude on people's privacy and freedom of expression. Telegram can be forced to give up data only if an issue is grave and universal enough to pass the scrutiny of several different legal systems around the world.

To this day, we have disclosed 0 bytes of user data to third parties, including governments. Another way of contacting people is to type their Telegram username into the search field – you don't need to know their phone number to do this.

Try sending them a download link via any other messaging service: email, Facebook, WhatsApp, an actual telegram — you name it. Android: Open the app menu (swipe right in chat list) > Invite Friends.

You can give your friends a link with your username so that they can easily find you on Telegram even if they don't have your phone number. One check — message delivered to the Telegram cloud and your friend has been notified if he allows notifications.

People Nearby is an optional feature that allows Telegram users to explore local groups, find friends to chat with in their area, or quickly exchange contacts with people who are close. You can also choose to permanently add your profile to the list of nearby people by tapping Make Myself Visible.

After becoming visible, you can remove your profile from the list at any time by tapping Stop Showing Me. Note: People Nearby is never turned on by default – users must manually enable it. As a result, users no longer need to worry about the data accumulating in their chats over the years.

Voice Chats add a live layer of ephemeral talk to the group. Easily trace a conversation and keep communication efficient, no matter the group size. Set default permissions to restrict all members from posting specific kinds of content. Or even restrict members from sending messages altogether – and let the admins chat amongst themselves while everybody else is watching. Send and receive files of any type, up to 2 GB in size each, access them instantly on your other devices. This way, anybody can view the group's entire chat history and join to post messages.

Telegram groups are ideal for sharing stuff with friends and family or collaboration in small teams. You can make any group public, toggle persistent history to control whether or not new members have access to earlier messages and appoint administrators with granular privileges. You can also pin important messages to the top of the screen so that all members can see them, including those who have just joined.

iOS: Start a new message (tap the icon in the top right corner in Chats) > 'New Group'. Android: Tap the circular pencil icon in the chat list > 'New Group'.

Telegram Desktop: Click the menu button in the top left corner > 'New Group'. You can add administrators to help you manage your group and define their privileges with granular precision.

Android: Go to Group Info (tap the name in the header) > the pencil icon (in the top right corner) > Administrators. It is easy to migrate existing groups to Telegram by sending people an invite link.

You can share username links with friends, write them on business cards or put them up on your website. We are based on the MTProto protocol (see description and advanced FAQ), built upon time-tested algorithms to make security compatible with high-speed delivery and reliability on weak connections. Telegram’s special secret chats use end-to-end encryption, leave no trace on our servers, support self-destructing messages and don’t allow forwarding.

On top of this, secret chats are not part of the Telegram cloud and can only be accessed on their devices of origin. Telegram is open, anyone can check our source code, protocol and API, see how everything works and make an informed decision.

Telegram supports verifiable builds, which allow experts to independently verify that our code published on GitHub is the exact same code that is used to build the apps you download from App Store or Google Play. On top of that, Telegram's primary focus is not to bring a profit, so commercial interests will never interfere with our mission.

All submissions which result in a change of code or configuration are eligible for bounties, ranging from $100 to $100,000 or more, depending on the severity of the issue. This means that all data (including media and files) that you send and receive via Telegram cannot be deciphered when intercepted by your internet service provider, owners of Wi-Fi routers you connect to, or other third parties. Or from any other people that get physical or root access to your phones or computers running Telegram.

If you have reasons to worry about your personal security, we strongly recommend using only Secret Chats in official or at least verifiable open-source apps for sensitive information, preferably with a self-destruct timer. Logging in with an SMS code is an industry standard in messaging, but if you're looking for more security or have reasons to doubt your mobile carrier or government, we recommend protecting your cloud chats with an additional password. You can also set up a recovery email address that will help regain access, should you forget your password. If you do so, please remember that it's important that the recovery email account is also protected with a strong password and 2-Step Verification when possible. A user with root access can easily bypass security features built into the operating system, read process memory or access restricted areas, such as the internal storage. You can order your messages, photos, videos and files to self-destruct in a set amount of time after they have been read or opened by the recipient.

To set the timer, simply tap the clock icon (in the input field on iOS, top bar on Android), and then choose the desired time limit. The clock starts ticking the moment the message is displayed on the recipient's screen (gets two check marks).

Unfortunately, there is no bulletproof way of detecting screenshots on certain systems (most notably, some Android and Windows Phone devices). After all, nobody can stop a person from taking a picture of their screen with a different device or an old school camera. After the secure end-to-end connection has been established, we generate a picture that visualizes the encryption key for your chat. Always compare visualizations using a channel that is known to be secure — it's safest if you do this in person, in an offline meeting with the conversation partner.

The problem of restoring access to your chat history on a newly connected device (e.g. when you lose your phone) does not have an elegant solution in the end-to-end encryption paradigm. Other apps ignore the need for backups altogether and leave their users vulnerable to data loss.

Meanwhile, the separate entity of Secret Chats gives you full control over the data you do not want to be stored. We are convinced that the separation of conversations into Cloud and Secret chats represents the most secure solution currently possible for a massively popular messaging application. On Telegram, you can send messages in private chats and groups without making your phone number visible.

By default, your number is only visible to people who you've added to your address book as contacts. Note that people will always see your number if they know it already and saved it in their address book. You may create another Telegram account on the second number as well, for example, if you want to keep work and personal chats separated.

Android, Telegram Desktop: Go to Settings > … (in the top right corner) > Log out. Note that logging out does not trigger remote deletion of your secret chat messages on your partner's device — to do that, choose 'Clear History' first. All groups and channels that you've created are orphaned and left without a creator but admins retain their rights. As was just mentioned above, all your data will be flushed from our system: all messages, groups, and contacts associated with your account will be deleted.

This means we can't help you unless you have access either to the phone number or to Telegram itself on any of your devices. First and foremost, you need to contact your phone provider, so that they block your old SIM and issue a new one with your number. Wait till you receive your new SIM with the old number, log in to Telegram, then go to Settings > Devices (or Privacy & Security > Active Sessions) and terminate your Telegram session on the old device.

Common thieves usually throw out the SIM card immediately (the phone is harder to locate this way), then wipe the devices and sell them, so there isn't much risk for the data in case of regular petty theft. Note that inactive Telegram accounts self-destruct automatically after a period of time — 6 months being the default setting. They can't access your last seen status and don't see your phone number (unless you decide to give it to them yourself). Naturally, any bot should be treated as a stranger — don't give them your passwords, Telegram codes or bank account numbers, even if they ask nicely.

In this case, you'll see 'has no access to messages' in the group members list next to the bot. Some bots need more information to work, so developers may disable the privacy mode.

As for Secret Chats, you don’t need the server-side code to check their integrity – the point of end-to-end encryption is that it must be solid regardless of how the servers function. In a post on his channel, Pavel Durov explained why Telegram hasn't published the server code, even as a publicity stunt.

The encryption and API used on Telegram's servers are fully documented and open for review by security experts. To enable you to run your own Telegram server while retaining both speed and security is a task in itself.

Don't forget about our Bot API that lets you build cool stuff on our platform. Both started out as unofficial applications by two different developers and vary in design and functionality.

Telegram for macOS supports many platform-specific features, such as the MacBook Pro Touch Bar, gesture navigation, integration with the Mac's Share menu and more. Telegram Lite is a lightning-fast app, optimized for work-related tasks and handling large communities.

It offers a three-column interface, perfect for multitasking and quick access to media, files and links shared in your chats. Telegram is officially available in English, Spanish, German, Dutch, Italian, French, Arabic, Portuguese, Korean, Malay, Russian and Ukrainian on most platforms, and we are gradually expanding the list of languages built into the apps. If you're looking to go beyond suggestions for individual phrases and would like to help us maintain the official translation to your language on a continuous basis, you can contact @TelegramAuditions. Please include a hashtag with the English name of your language (e.g. #Albanian) and a few links to phrases on this platform with your translation suggestions or comments.

If you would be interested in answering questions about Telegram to users from your country, contact our auditions account. Telegram Passport is a unified authorization method for services that require personal identification. With Telegram Passport, you can upload your documents once, then instantly share your data with services that require real-world ID (finance, ICOs, etc. Your identity documents and personal data will be stored in the Telegram cloud using End-to-End Encryption. If you're a developer or owner of a service that requires real-life ID, kindly take a look at this manual. If the tips below don't help, check out this detailed guide on Troubleshooting Notification Issues.

Check notification priority for Telegram in Android settings, it can be called Importance or Behaviour depending on your device. If your phone uses some battery saving software, make sure that Telegram is whitelisted in that application.

For our notifications to work, you need to add Telegram to allowed apps in those devices' security settings. Force quit the app (double tap home button, then swipe up on Telegram), then relaunch and check if it helped. To delete a contact, open a chat with the person, tap the title in the top area of the chat screen to open their profile, then tap on (⋮) in the top right corner > 'Delete contact'.

This means that if you randomly contact people you don't know and send them annoying messages, you may lose the ability to do so in the future. Permission monitors on Samsung and Xiaomi can inadvertently flag and notify you that Telegram requested access to camera in the background.

Anyone can check Telegram’s open source code and confirm that the app is not doing anything behind their back. We also offer reproducible builds that can help you prove that the version you downloaded from App Store or Google Play is built from the exact same source code we publish.

Don't be afraid to DM it the number you use for Telegram, we need this info to investigate issues.

Slack vs WhatsApp: What is the difference?

Slack vs WhatsApp: What is the difference?

Apps and blogs without ads are more aesthetically pleasing, nicer to use, and make the content stand out. Can be personalised ✔ Slack ✔ WhatsApp You can personalize the appearance of the app - for example, choosing a different theme or colors.

The app is business oriented ✔ Slack ✖ WhatsApp This means that it has been designed especially for professional use.

How private are your favourite messaging apps?

How private are your favourite messaging apps?

We’ve ranked 11 companies that run the world’s most popular messaging apps – including Skype, Snapchat and Facebook Messenger – on how well they’re using encryption to protect your online privacy. WhatsApp is the only app where users are explicitly warned when end-to-end encryption is not applied to a particular chat, but Messenger does not apply end-to-end encryption as a default, and does not warn users that regular conversations use a weaker form of encryption.Score 73 / 100. However the company should do more to notify users within the apps themselves about when their information is protected through end-to-end encryption and when it is not (for example when you send a message to a non-iPhone user).Score 67 / 100.

Telegram Messenger is a messaging app with 100 million monthly active users. Google does disclose government requests for data and has taken a public stance against “encryption backdoors” which would unlock devices or apps and allow governments to access personal data.Score 53 / 100.

The Line mobile messaging service has more than 200 million active daily users, with the majority in Japan, Indonesia, Thailand and Taiwan. The app scored full marks for providing end-to-end encryption by default in all communication on their messaging apps, but does not do enough to inform users about threats to human rights, and does not publish a transparency report.Score 47/ 100. Microsoft has owned Skype since 2011, and the voice and video calling service now has 300 million active users. Despite Microsoft’s strong policy commitment to human rights, it is still using a weak form of encryption on Skype.Score 40 / 100.

Blackberry Messenger is reported to have 100 million users, and only offers end-to-end encryption as a paid subscription service. It is also calling on technology companies to clearly inform users of the level of encryption applied to their messaging services.

How Shall I Write to My Patient? Data Protection in Digital

How Shall I Write to My Patient? Data Protection in Digital

Dieser Artikel möchte Psychotherapeuten für ihre Verantwortung sensibilisieren, und es sollen darin technische Möglichkeiten dargestellt werden, die individuell sorgfältig abgewogen werden müssen, um gegebenenfalls den Datenschutz der digitalen Kommunikation in der Praxis zu verbessern. The frequency of use of e-mail (69%) and SMS or messenger apps (32%) was particularly high in psychotherapeutic practices.

Patients in psychotherapy also use digital media frequently [Kalckreuth et al., 2014]. Data protection risks are particularly problematic in the psychotherapist’s professional practice, because communication between psychotherapists and their patients is subject to special confidentiality obligations and particularly high data protection requirements must be met [Kassenärztliche Bundesvereinigung, 2018a]. Anyone who also wants to offer their patients modern digital forms of communication must take additional precautions to ensure that the security and confidentiality of patient data are maintained [Jenkins, 2015].

Whether communication between psychotherapist and patient by e-mail, SMS, or Messenger is permitted under the data protection law and how secure these digital communication methods are has not yet been communicated sufficiently clearly in the training of psychotherapists [Vogel and Alpers, 2009], and there are published examples of the fact that the importance of data protection in the everyday life of health care professions is often glaringly underestimated [Ubel et al., 1995; Vigod et al., 2003]. In digital communication between psychotherapist and patient, this means that not only the content of the communication, but also the fact that such a communication is occurring, deserves protection. Since SMS or Messenger texts are usually not printed out, it is not generally possible to ensure that they are documented. The GDPR sets strict requirements for the processing of personal data, and the national data protection legislation, such as the Federal Data Protection Act (BDSG), normalizes additional requirements for lawful personal data processing. Since digital communication with patients is generally not permitted by a legal norm, the patient’s consent to the data processing is required. 7 GDPR and §51 BDSG to be effective, which means that psychotherapists must provide their patients with comprehensive information about the relevant risks of the particular digital form of communication and that consent must be demonstrable, which usually requires written consent stating the purpose of the communication.

Even if the patient has consented to being contacted by digital communication media after comprehensive information has been provided, this does not release the treating psychotherapist from taking suitable protective and security measures. Security of Digital Communication Channels.

To ensure this, psychotherapists should avail themselves of the service and maintenance of professional service providers, with whom an order-processing contract in accordance with Art. With some encryption methods, the provider of the communication service has the key and can theoretically access the content of the messages. In addition to the direct content of the message, the so-called metadata of a communication are also important, such as information about who is communicating with whom and how often. The processing and use of these metadata are also important criteria with regard to data protection, since they provide information on the communicative exchange between psychotherapist and patient and thus on a possible treatment relationship. Care is required for every digital communication between psychotherapist and patient, and there are multiple data protection risks encountered in daily practice. In addition to the explicit disclosure of data, the implicit information about the treatment relationship is also relevant.

Table 1 gives an overview of the methods presented, which are explained individually below. The user frequency of messenger apps in particular is increasing rapidly, so WhatsApp, Signal, Telegram, and Threema are presented from a legal data protection perspective.

Its content is not secured, and the service providers can read, process, and, if desired, pass it on to third parties as it makes its way over the Internet. Although in Germany the TKG says that providers may not pass on information about a communication to third parties, the regulations do not guarantee this aspect of data protection. Unencrypted e-mails are therefore in principle not suitable for communication between psychotherapist and patient.

Encrypted E-Mails. For this reason, this method is also only suitable for secure communication if both communicating parties use secure providers or can take special precautions to remain anonymous to their e-mail provider. Of course, the therapy-related content should never be communicated via SMS.

Messages sent through the most popular messenger app, WhatsApp, have been encrypted end-to-end by default since 2016 [WhatsApp Inc., 2017]; the content of the messages can therefore not be read or evaluated by the provider. The server is located in the USA, so it is possible for the US authorities to access the stored data (see above).

Users of the app give WhatsApp access to the entire address book of the smartphone being used and agree that the company or its partners (WhatsApp was acquired by Facebook in 2015) may synchronize data such as names and phone numbers. 4 GDPR, this qualifies as processing of personal data and would be regarded as a data protection violation without the consent of all(!). A psychotherapist should not make himself vulnerable in this way in his professional practice. WhatsApp is therefore not at all suitable for communication between psychotherapist and patient. We think it worth emphasizing that psychotherapists should not save the telephone numbers and contact information of their patients in the address book of a device with which they also use WhatsApp, even privately. For this reason, the use of WhatsApp in patient communications should not be considered a responsible professional ethical approach.

Signal also requires access to the address book during installation in order to find other users of the app and link them to the new user. It is an obstacle to communication with patients that Signal does not offer a German data privacy statement, nor does the official website provide any precise information about which metadata Signal collects and stores and how these data are used. As with WhatsApp, Telegram also requires access to the address book and stores the phone numbers and the first and last names of the contacts [Telegram, 2019a].

Synchronizing the address book is also optional with Threema, in comparison to WhatsApp and Signal. If the practitioner uses the Threema Work variant to communicate with his patients, private and professional communication can remain separate and the risk can be minimized of inadvertently passing on private information to patients or patients’ confidential information to private contacts.

The points mentioned above regarding encryption and anonymity, as well as the renunciation of the storage of metadata, make Threema a user-friendly messenger app that is acceptable for communicating clearly limited content between psychotherapist and patient. Even if it has been explicitly agreed with a patient that digital communication may only be used, for example, to make an appointment, it still happens that patients send a confidential request by e-mail, SMS, or a messenger service.

The patient’s (confidential) text should always be deleted in the practitioner’s reply. Documentation Requirements for Psychotherapists.

Alongside the detailed data protection issues, there are other aspects that need to be considered if a person wants to communicate with digital media. Great caution is generally required in digital communication between psychotherapist and patient. The services of the Federal Office for Information Security and Consumer Protection are reliable sources of information.

However, digital communication media can be used if explanations, consent, and adequate encryption are provided. Communication by unencrypted e-mail, WhatsApp, Telegram, or Signal is inadvisable in the psychotherapeutic context. Communication via encrypted e-mails (using a secure e-mail provider), SMS, or the Threema messenger app, on the other hand, can be regarded as comparatively secure for selected purposes. While there are more and more important developments in Internet-supported therapy that can use specially protected communication platforms, there is still a considerable way to go before everyday forms of communication can also be used in conventional psychotherapy [Creaner, 2015]; therapists should be warned against hasty recommendations for use, particularly in therapy with adolescents [see Borg-Laufs, 2015]. Article / Publication Details. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s).

Why Threema Instead of WhatsApp?

Why Threema Instead of WhatsApp?

By systematically collecting metadata and combining it with data from other services (e.g., Instagram), detailed user profiles can be created.

Threema, Signal, Telegram: Drei sichere Alternativen zu Whatsapp

Threema, Signal, Telegram: Drei sichere Alternativen zu Whatsapp

Und welche Vor- und Nachteile haben diese? Auch Sprachnachrichten können über Threema versendet werden.

Die Identifikation eines Nutzers erfolgt über eine achtstellige ID. Der Messenger kann also im Gegensatz zu Whatsapp ohne Angabe personenbezogener Daten genutzt werden. Außerdem ist die App werbefrei, ist allerdings nicht kostenlos zu haben.

Außerdem gibt es seit 2017 die Möglichkeit, Threema auch am Desktop-Rechner zu nutzen und nicht nur auf dem Smartphone. Der Messenger Signal ist vor allem durch Edward Snowden bekannt geworden. Im Zusammenhang mit der Aufdeckung weltweiter Überwachungs- und Spionagemethoden hatte Snowden den Messenger Signal für sicher erklärt.

Im Kern hat der Messenger ähnliche Funktionen wie Whatsapp. Die Server des Unternehmens stehen allerdings in den USA und unterliegen damit weniger strengen Datenschutzregeln wie die in Europa geltenden.

Auch der Messenger Telegram funktioniert im Prinzip wie Whatsapp. Anders als bei Whatsapp können bei Telegram sehr große Gruppenchats mit bis zu 100 Teilnehmern erstellt werden. Und es gibt noch eine nette Spielerei: Bei Telegram können Nachrichten verschickt werden, die sich nach einer gewünschten Zeit wieder von selbst löschen.

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