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Changes between Version 2 and Version 3 of ServerCertificate

v2	v3
2	2
3	3	== Brief explanation ==
4		The certificate of JOSM's site is invalid because it's self signed. This means that the certificate is good, but it hasn't been acknowledged by any of the certification authorities currently present in the world. To do so, JOSM would have to pay a fee to get a certificate signed by any of those authorities, but since JOSM is a free association of volunteers, no money is available to pay for a valid certificate. So the certificate has been signed by themselves, which is already a form of validation, since the JOSM people are very trustworthy, or better, it has been self signed.
	4	The certificate of JOSM's site is called invalid because it's self signed. This means that the certificate is good, but it hasn't been acknowledged by any of the certification authorities currently present in the world. To do so, JOSM would have to pay a fee to get a certificate signed by any of those authorities, but since JOSM is a free association of volunteers, no money is available to pay for a valid certificate. So the certificate has been signed by themselves, which is already a form of validation, since the JOSM people are very trustworthy, or better, it has been self signed.
5	5
6	6	Certificates by acknowledged authorities are trusted automatically. Self-signed certificates must be accepted individually. After they have been accepted they offer the same level of security.