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Telegram - secure, free messaging

telegram.org

71–80 of 231 posts

Re: Telegram - secure, free messaging

#71
Wow, there are so many cryptography experts with world names in this thread!

And interesting why you think that it's not possible to read most of cryptography/cryptanalysis books and check common mistakes of implementation afterward? Do you really think that this is THAT hard?

Your scepsis would be understandable if they used OWN cryptoalgorithm. However their protocol is based on well known strong crypto.

Re: Telegram - secure, free messaging

#73
post #7

From their FAQ: > Q: How secure is Telegram? > Very secure. We are based on a new protocol, MTProto, built by our own specialists from scratch, with security in mind. At this moment, the biggest security threat to your Telegram messages is your mother reading over your shoulder. We took care of the rest. Oh good, a bunch of randoms have rolled their own crypto. I stopped reading at this point.

"Oh good, a bunch of randoms have rolled their own crypto. I stopped reading at this point." An ad-hominem attack. This is Hacker News and their work is open, how about making a statement after researching the actual code instead?

In this case, even if you remove the ad-hominem attack (a bunch of randoms), a valid point remains: implementing crypto is already notoriously difficult, let alone designing cryptographic protocols.

Re: Telegram - secure, free messaging

#74
post #7

From their FAQ: > Q: How secure is Telegram? > Very secure. We are based on a new protocol, MTProto, built by our own specialists from scratch, with security in mind. At this moment, the biggest security threat to your Telegram messages is your mother reading over your shoulder. We took care of the rest. Oh good, a bunch of randoms have rolled their own crypto. I stopped reading at this point.

"Oh good, a bunch of randoms have rolled their own crypto. I stopped reading at this point." An ad-hominem attack. This is Hacker News and their work is open, how about making a statement after researching the actual code instead?

You're assuming that the average HN is in a position to audit crypto code.

We use well audited crypto primitives with formal proofs because they're known safe, or at least orders of magnitude safer than whatever these fools cooked up.

tl;dr provide proof or gtfo. We're not here to audit you.

Re: Telegram - secure, free messaging

#75

Earlier quoted context omitted.

MTProto's author is Nikolai Durov: http://en.wikipedia.org/wiki/Nikolai_Durov He is one of most legendary math/programming champions of all time.

He's done nothing in crypto, and he's rolled his own protocol. That's historically been recipe for disaster regardless of how many honors you hold. Colin Percival is similarly decorated, along with being a cryptographer (he's the FreeBSD security officer): http://www.daemonology.net/papers/ ... yet even his crypto app Tarsnap was broken for over a year before he noticed, due to a typo during an innocent-looking refac…

And the only reason the critical bug was found is because it was open source. This, as far as I can see, isn't.

Looks like the programme is open source: http://telegram.org/source

Re: Telegram - secure, free messaging

#76
post #7

From their FAQ: > Q: How secure is Telegram? > Very secure. We are based on a new protocol, MTProto, built by our own specialists from scratch, with security in mind. At this moment, the biggest security threat to your Telegram messages is your mother reading over your shoulder. We took care of the rest. Oh good, a bunch of randoms have rolled their own crypto. I stopped reading at this point.

Also, they store everything to their cloud. Very secure indeed!

Re: Telegram - secure, free messaging

#78

Earlier quoted context omitted.

MTProto's author is Nikolai Durov: http://en.wikipedia.org/wiki/Nikolai_Durov He is one of most legendary math/programming champions of all time.

He's done nothing in crypto, and he's rolled his own protocol. That's historically been recipe for disaster regardless of how many honors you hold. Colin Percival is similarly decorated, along with being a cryptographer (he's the FreeBSD security officer): http://www.daemonology.net/papers/ ... yet even his crypto app Tarsnap was broken for over a year before he noticed, due to a typo during an innocent-looking refac…

It looks like TextSecure encrypts your actual texts, for which you still pay, while Telegram also takes care of delivery, for free, and does it faster and better than SMS (which should be pretty darn easy, what with SMS doing such a very bad job indeed).

Re: Telegram - secure, free messaging

#79
post #65

People here are complaining a lot about this app, and rightfully so. However, this is definitely the best encrypted communications app there is for ios and therefore also the only app that is cross platform and able to reach a wide audience. I know they didn't do it completely right, but it definitely seems to be the best option that is currently available.

An "encrypted communications app" that is not using secure encryption is worse than an unencrypted one - the users get a fake feeling of security, and might reveal sensitive information to whoever is listening.

Regarding real security, have a look at ChatSecure, which is available for iOS and Android, uses standard encryption protocols (XMPP with TLS, OTR), is open source, and was developed by the Guardian Project (who have a track record of developing security software):

https://itunes.apple.com/de/app/id464200063

https://play.google.com/store/apps/details?id=info.guardianp...

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