Cryptography – Examples

 1.WhatsApp Encryption:

End-to-end encryption in WhatsApp is a notable example of cryptographic encryption these days. This functionality is available in WhatsApp via the asymmetry model or through public-key techniques. Only the intended recipient is aware of the real message. After installing WhatsApp, public keys are registered with the server, and messages are sent.

2. Digital signatures:

Digital signatures are another real-time application of cryptography. When two clients need to sign paperwork for a commercial transaction. However, if two clients never meet, they may not believe each other. Then, encryption in digital signatures guarantees improved authenticity and security.

3. Email Encryption/Decryption:

Email encryption protects the content of emails from anyone outside of the email discussion who wants to access a participant’s information. An email is no longer readable by a human when it is encrypted. Your emails can only be unlocked and encrypted with your private email key.

4. Authentication of SIM cards:

The SIM must be authenticated before it may be used to access the network. The operator generates a random number and sends it to the mobile device. This random number, together with the secret key Ki, is fed into the A3 algorithm (it is this Ki that recently has been compromised). The result of this computation is returned to the operator, who compares it to the result of the calculation he performed himself.

5. Disk Encryption:

Disk encryption software encrypts your whole hard disc, eliminating the need to worry about leaving any traces of unencrypted data on your disc. PGP may be used to encrypt data as well. In this example, PGP encrypts the file with IDEA using the user’s private key and a password given by the user. To unlock the file, the same password and key are needed.