Skype users can now make encrypted voice calls and text chats. The end-to-end encryption used by Skype means that your chats are encrypted from one end to the other, ensuring eavesdroppers can’t intercept your messages or listen into your conversation. It has taken a while for Skype to offer the feature, but it’s better late than never.
However, be aware that encryption is an OPTION. Unfortunately, the default remains the same as it has always been: unencrypted. Your calls are not encrypted unless you manually choose the option to encrypt the call. If you want a truly private and secure video call or messaging, use Signal or Wire.
If you really do want to use Skype, check out the article at https://www.makeuseof.com/tag/skype-end-to-end-encryption/.