Linux 4.2 Adds New Public Key Encryption API, Jitter RNG
With the crypto update for Linux 4.2 comes the new Public Key Encryption API that provides an Akcipher (Asymmetric Key Interface) type. This new interface allows for asynchronous implementations that support calculations to offloaded to relevant supported hardware while still supporting the existing Linux Crypto API. That seems to be the gist of it at least.
The Crypto update for Linux 4.2 also supports the Chacha20 / Poly1305 / RFC7539 algorithms, there's a new RSA implementation, DRBG is now the default crypto API RNG, accelerated SHA-512 support on ARM64, a Jitter entropy RNG, and various other changes.
The Jitter Entropy Random Number Generator provides entropy by collecting CPU execution time jitter and is used to seed another random number generator.
The 4.2 crypto update in full can be found via this pull request.
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