Data in transit refers to digital information that is being transferred between locations within or across networks. It contrasts with data at rest, which is data that is stored on a hard drive, server, or in any other type of storage device, and data in use, which is being processed by applications. The security of data in transit is crucial because it is vulnerable to interception, modification, or theft by unauthorized parties. To protect data in transit, organizations commonly implement security measures such as encryption, using protocols like Transport Layer Security (TLS), Secure Sockets Layer (SSL), and Virtual Private Networks (VPNs). These technologies encrypt the data while it moves from one location to another, ensuring that even if the data is intercepted, it cannot be read or altered without the encryption key.