When referring to Transport Layer Security (TLS), the cryptographic protocol securing internet communications, older versions such as TLS 1.0 and TLS 1.1 are officially deprecated and considered outdated or insecure by modern cybersecurity standards. However, the current active versions—specifically TLS 1.2 and TLS 1.3—are entirely contemporary, highly robust, and represent the global cryptographic baseline required for safeguarding data privacy across web browsers, secure APIs, and corporate networks. Conversely, if referring to Tiziana Life Sciences (TLSA), its proprietary nasal immunotherapy pipeline represents cutting-edge clinical research rather than outdated technology.