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2. Cryptographically secure pseudorandom number generator ...

   en.wikipedia.org/wiki/Cryptographically_secure...

   In the asymptotic setting, a family of deterministic polynomial time computable functions : {,} {,} for some polynomial p, is a pseudorandom number generator (PRNG, or PRG in some references), if it stretches the length of its input (() > for any k), and if its output is computationally indistinguishable from true randomness, i.e. for any probabilistic polynomial time algorithm A, which ...

3. Facebook rolls out encrypted cloud chat backups on WhatsApp

   techcrunch.com/2021/10/14/whatsapp-now-lets...

   Users on WhatsApp will see an option to generate a 64-digit encryption key to protect their chat backups in the cloud. Users can store the encryption key offline or in a password manager of their ...

4. Replay attack - Wikipedia

   en.wikipedia.org/wiki/Replay_attack

   Illustration of a replay attack. Alice (A) sends her hashed password to Bob (B). Eve (E) sniffs the hash and replays it. Suppose Alice wants to prove her identity to Bob. . Bob requests her password as proof of identity, which Alice dutifully provides (possibly after some transformation like hashing, or even salting, the password); meanwhile, Eve is eavesdropping on the conversation and keeps ...

5. Hacker finds bug that allowed anyone to bypass Facebook 2FA

   techcrunch.com/2023/01/30/facebook-two-factor

   Mänôz found the bug in the Meta Accounts Center last year, and reported it to the company in mid-September. Meta fixed the bug a few days later, and paid Mänôz $27,200 for reporting the bug ...

6. WhatsApp's new 'secret codes' add an extra layer of privacy ...

   techcrunch.com/2023/11/30/whatsapps-new-secret...

   Image Credits: WhatsApp. WhatsApp is rolling out a new “secret codes” feature that adds another layer of privacy to your locked conversations on the messaging platform. The app launched locked ...

7. WhatsApp rolls out end-to-end encryption for chat backups

   www.engadget.com/whats-app-end-to-end-encryption...

   While WhatsApp messages have been encrypted since 2016, the app hasn’t offered end-to-end encryption of backups, which rely on iCloud or Google Drive. But with the latest update, users will be ...

8. Key (cryptography) - Wikipedia

   en.wikipedia.org/wiki/Key_(cryptography)

   Key (cryptography) A key in cryptography is a piece of information, usually a string of numbers or letters that are stored in a file, which, when processed through a cryptographic algorithm, can encode or decode cryptographic data. Based on the used method, the key can be different sizes and varieties, but in all cases, the strength of the ...

9. WhatsApp makes it easier to send messages to unsaved numbers

   www.engadget.com/whatsapp-makes-it-easier-to...

   You can try out this new feature much in the same way you would start any message. Click on the new message button on your home screen (top right for Apple devices, bottom right for Android ones ...