Research on Private Transactions in IOTA
https://blog.iota.org/research-on-private-transactions-in-iota-cd546751e2c4After completing a security audit, an IOTA token mixer will be publicly released, hopefully within a month, with private beta testing currently being finalized. It makes the first step towards improving the anonymity and fungibility of IOTA, and can form the foundation of trustless solutions in the future.
To elaborate on the drawbacks of the current mixer: with the lack of enforced timestamps in IOTA, such a service cannot yet be trustless. A malicious service administrator could take the funds from a user. We have mitigated this slightly by having the mixer issue a signed contract to the user. And once IOTA has enforced timestamps, developments towards a trustless model can be made. The previous network upgrade brought with it a new transaction structure (see below), and in the next IRI release, these timestamps will be enforced in a first roll-out on the testnet...........