Cryptography is the practice of using mathematical algorithms to secure communications and protect information. Cryptography is used in many applications, such as online banking, secure messaging, and digital signatures. Popular cryptographic algorithms include RSA, AES, and SHA. See more Virtual reality (VR) is a technology that involves using computer-generated simulations to create a realistic and immersive experience. VR is used in many applications, such as gaming, education, and training. Popular VR platforms include Oculus, HTC Vive, and PlayStation VR.