I was just curious to know if pega has any specific security guidelines for banking system. Being part of Pega CoE in my current organization, I am being asked the same question so if there are specific security standards (for e.g. some security certificates need to be installed before calling pega apis) for banking, we can plan it for implementing the same.
Security is such as broad topic, hard to imagine there are any general guidelines, at least I am not aware of any. As for Pega API, Pega recommends accessing APIs using TLS 1.2. This means your other client applications would need to install SSL client certificates most likely.