Themis

General purpose cryptographic library for storage and messaging for Swift, Obj-C, Android, desktop Java, С++, Node.js, Python, Ruby, PHP, Go, Rust. Hides cryptographic details. Made by cryptographers for developers.

Crypto systems

Themis is an open-source high-level cryptographic services library for mobile and server platforms that provides secure data exchange, authentication, and storage protection. Themis provides ready-made building components, which simplify usage of core cryptographic security operations.

Themis provides 4 important cryptographic services:

• Secure Cell: a multi-mode cryptographic container suitable for storing anything from encrypted files to database records and format-preserved strings. Secure Cell is built around AES-256 in GCM (Token and Seal modes) and CTR (Context imprint mode).
• Secure Message: a simple encrypted messaging solution for the widest scope of applications. Exchange the keys between the parties and you’re good to go. Two pairs of underlying cryptosystems: ECC + ECDSA / RSA + PSS + PKCS#7.
• Secure Session: session-oriented encrypted data exchange with forward secrecy for better security guarantees and more demanding infrastructures. Secure Session can perfectly function as socket encryption, session security, or a high-level messaging primitive (with some additional infrastructure like PKI). ECDH key agreement, ECC & AES encryption.
• Secure Comparator: Zero knowledge-based cryptographic protocol for authentication and comparing secrets.