| dc.description.abstract | eHealth	and	mHealth	systems	are	getting	more	popular	today;	yet,	vulnerabilities	are	much	higher	when	the	sensitive	medical	data	being	transferred	through	public	networks.	Therefore,	it	is	essential	to	have	a	digital	identification	and	authentication	mechanism	to	authenticate	peers	in	a	digital	world.	Especially,	it	will	help	to	avoid	attacks	such	as	man-in-the-middle	attack.	Although	the	digital	certificates	can	solve	this	issue,	it	has	not	been	used	by	the	general	public	yet	to	protect	their	digital	data.	This	is	mainly	due	to	their	limited	knowledge	in	IT	and	the	complexity	of	the	process.	Thus,	it	is	required	to	have	a	simple	security	tool	to	support	encryption,	digital	signature,	digital	authentication,	and	integrity	verification.	However,	we	have	developed	a	digital	certificate	management	system	to	facilitate	all	these	features	including	creating	asymmetric	key	pairs,	generating,	signing,	chaining	and	revoking	certificates,	and	signing	and	verifying	digital	contents.	Because	it	is	a	Java	based	application,	it	is	platform	independent;	thus	portable.	In	backend,	it	uses	OpenSSL	library.	Moreover,	it	is	capable	of	managing	present	RSA	based	certificates	as	well	as	the	novel	Elliptic	Curve	(EC)	based	certificates.	Thus,	it	is	more	robust,	future-proof	and	well-suited	for	mobile	devices.	However,	a	usability	test	was	performed	to	evaluate	its	usability,	efficiency	and	the	effectiveness.	47	undergraduate	and	postgraduate	students	were	voluntarily	attended	for	the	test	and	their	responses	were	critically	analysed.	Compare	to	the	conventional	command	line	based	method,	100%	of	user	satisfaction	has	been	gained	by	the	developed	tool.	In	conclusion,	it	is	a	simple,	free	and	open	source	software	for	the	public	to	secure	their	digital	data. | en_US |