[memracom]

Judging by the phone numbers, I would say that this is likely to be some form of elliptic curve cryptography with domain parameters different from the NIST and GOST standards.

I don't personally have the depth of experience with elliptic curves to go about cracking this crypto, but others have cracked elliptic curve algorithms. Perhaps one of those people will find this tidbit useful in narrowing the field.

Also, I would expect that at least some of the plain text is Unicode, probably the plane from 0400-04FF.