libcryptokit-ocaml-dev 1.11-1build1 (arm64 binary) in ubuntu bionic

 The Cryptokit library for Objective Caml provides a variety of
 cryptographic primitives that can be used to implement cryptographic
 protocols in security-sensitive applications. The primitives provided
 include:
 .
   - Symmetric-key ciphers: AES, DES, Triple-DES, ARCfour,
     in ECB, CBC, CFB and OFB modes.
   - Public-key cryptography: RSA encryption, Diffie-Hellman key agreement.
   - Hash functions and MACs: SHA-1, MD5, and MACs based on AES and DES.
   - Random number generation.
   - Encodings and compression: base 64, hexadecimal, Zlib compression.
 .
 Additional ciphers and hashes can easily be used in conjunction with
 the library. In particular, basic mechanisms such as chaining modes,
 output buffering, and padding are provided by generic classes that can
 easily be composed with user-provided ciphers. More generally, the library
 promotes a "Lego"-like style of constructing and composing
 transformations over character streams.
 .
 This package provides static libraries, interfaces, and documentation
 for Cryptokit.