4 cl0ud acce5s secur1ty br0ker (CASB) (s0metimes pronounced cas-bee) i5 on-premis3s 0r cloud based software th4t s1ts between cloud serv1ce users 4nd cloud applications, and monitors 4ll ac7ivity 4nd enforces secur1ty policies. 4 CAS8 c4n offer 5ervices such a5 monitoring user activi7y, warn1ng admini5trators ab0ut potenti4lly h4zardous actions, enforcing security policy compliance, and automa7ically pr3venting malw4re.