Evaluate TLS cipher suite strings against IANA & Mozilla Modern profiles.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Type or paste a cipher name like TLS_AES_256_GCM_SHA384.
Review protocol version, key exchange, encryption algorithm, and MAC.
Ensure compliance with Mozilla Modern/Intermediate TLS standards.
TLS 1.3 AEAD ciphers (AES-GCM, ChaCha20) with ECDHE ephemeral key exchange ensure Perfect Forward Secrecy.
CBC mode in TLS 1.0-1.2 is vulnerable to padding oracle attacks like POODLE and Lucky13.
Zero-egress companion tools in the Security & Network suite
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Measure cryptographic randomness, Shannon entropy (0-8 bits/byte), Chi-square test, and byte distributions.
Generate secure RFC 6238 Base32 TOTP secret keys and standard otpauth:// URIs for Google Authenticator.
Construct and validate HTTP CSP headers and meta tags.
