olm: olm (Implementation of the olm and megolm cryptographic ratchets) olm: olm: An implementation of the Double Ratchet cryptographic ratchet olm: written in C and C++11 and exposed as a C API. olm: olm: This library also includes an implementation of the olm: Megolm cryptographic ratchet. olm: olm: olm: See also: https://gitlab.matrix.org/matrix-org/olm olm: