Secure web access has a remarkable growth. Users would like to exploit the advantages of the Internet for online banking, for e-commerce or they simply would like to protect their information e.g. with using a secure web mailer. Https is a simple http traffic on top of a security protocol (e.g. SSL, TLS) is used for serving this need. This paper gives detailed analysis of https traffic to aid traffic dimensioning or traffic modelling and even to assist investigation of traffic flow confidentiality.