Question

What is ISCL in terms of TCP

Answer 1

It stands for Integrated Secure Communication Layer Protocols for Secure Medical Image Management Systems.

ISCL is a security layer which manages
security function between presentation
layer and TCP/IP layer. ISCL mechanism
depends on basic function of a smart
IC card and symmetric secret key
mechanism. A symmetry key for each
session is made by internal
authentication function of a smart IC
card with a random number. ISCL has
three functions which assure
authentication, confidently and
integrity. Entity authentication
process is done through 3 path 4 way
method using functions of internal
authentication and external
authentication of a smart iC card.
Confidentially algorithm and MAC
algorithm for integrity are able to be
selected. ISCL protocols are
communicating through Message Block
which consists of Message Header and
Message Data. ISCL protocols are
evaluating by applying to regional
collaboration system for image
diagnosis, and On-line Secure
Electronic Storage system for medical
images.

Some more info can be found in ISCL and DICOM Security. From what I can tell, it’s basically an SSL protocol alternative that uses smart card instead of CA (certificate authority), invented by Japanese and used in Japan. Not sure how popular it is.