#Verification Of SD-JWT Credentials

Verifier requests, holder shares selective disclosures, verifier verifies hashes and signature.

#SD-JWT Credential Verification Process

Selective Disclosure Sharing: During the verification process, the verifier asked for a certain set of claims. The selective disclosure sharing mechanism allows the holder then to only share does require claims through sending the whole SD-JWT plus the disclosures which are needed for verification. This process therefore helps with privacy by not revealing more identity information than what's specifically requested.
Disclosure Verification: The verifier, upon receiving the shared disclosures and the SD-JWT, can confirm that the shared disclosures are a part of the SD-JWT. This is done by hashing the received disclosures in the same manner as the issuer did during the issuance process.
Hash Comparison and Tamper Check: The verifier then compares the hashed values of the shared disclosures with the values present in the SD-JWT. If the hashed values match, the verifier can be confident that the shared values haven't been tampered with and are actually part of the SD-JWT.
Transfer Format: Transferring the credential from holder to verifier happens through the sharing of the SD-JWT with the concatenated disclosures which were chosen to be revealed using the ~ sign. An example of this format would be:

eyJraWQiOiI5MmJlMTAzYjRkZmY0OGYxYmE5ODc4ZGQyNmZhZjcxZSIsImN0eSI6ImNyZWRlbnRpY
WwtY2xhaW1zLXNldCtqc29uIiwidHlwIjoidmMrc2Qtand0IiwiYWxnIjoiRWREU0EifQ.eyJjcmV
kZW50aWFsU2NoZW1hIjp7ImlkIjoiaHR0cHM6Ly9yYXcuZ2l0aHVidXNlcmNvbnRlbnQuY29tL3dh
bHQtaWQvd2FsdGlkLXNzaWtpdC12Y2xpYi9tYXN0ZXIvc3JjL3Rlc3QvcmVzb3VyY2VzL3NjaGVtY
XMvVmVyaWZpYWJsZUlkLmpzb24iLCJ0eXBlIjoiRnVsbEpzb25TY2hlbWFWYWxpZGF0b3IyMDIxIn
0sImV2aWRlbmNlIjpbeyJkb2N1bWVudFByZXNlbmNlIjpbIlBoeXNpY2FsIl0sInZlcmlmaWVyIjo
iZGlkOmVic2k6MkE5Qlo5U1VlNkJhdGFjU3B2czFWNUNkakh2THBRN2JFc2kySmI2TGRIS25ReGFO
IiwiZXZpZGVuY2VEb2N1bWVudCI6WyJQYXNzcG9ydCJdLCJ0eXBlIjpbIkRvY3VtZW50VmVyaWZpY2
F0aW9uIl0sInN1YmplY3RQcmVzZW5jZSI6IlBoeXNpY2FsIn1dLCJpc3N1YW5jZURhdGUiOiIyMDI
xLTA4LTMxVDAwOjAwOjAwWiIsImNyZWRlbnRpYWxTdWJqZWN0Ijp7InBlcnNvbmFsSWRlbnRpZmll
ciI6IjA5MDQwMDgwODRIIiwiZmlyc3ROYW1lIjoiSmFuZSIsIl9zZCI6WyJuNWRYOEVpTUNoQ1hBR
0o3elZCM1duQjc4Y3lBVFp3T1hwVkpCTUdOUzhzIiwiemFxMTNsa2lHLTd2am90SFppM0psSmhwS2
JtUjFTVnV6Q3pLYVZYOUZRUSIsInhyYjdTOFZsNlctb0dMaVVQcTVlMmplVFpKVk5mYmRtNW9KNj
d0VlVQem8iLCJwT0Jmb3hmQndqQUNPbXZ4aTNUSTc0RDN4Y2FwZS1RWVlGeUNPZEpPel9VIiwiRm1
ZcmFmbWotUW9lbE1sSkQtVTN2OVgwS3hXTkZwelhwRl9McVc2dkZ0byJdLCJwbGFjZU9mQmlydGgi
OiJMSUxMRSwgRlJBTkNFIiwiZ2VuZGVyIjoiRkVNQUxFIiwiZmFtaWx5TmFtZSI6IkRPRSIsImlkI
joiZGlkOmVic2k6MkFFTUFxWFdLWU11MUpIUEFnR2NnYTRkeHU3VGhnZmdOOTVWeUpCSkdaYlNKV
XRwIiwibmFtZUFuZEZhbWlseU5hbWVBdEJpcnRoIjoiSmFuZSBET0UiLCJjdXJyZW50QWRkcmVzc
yI6WyIxIEJvdWxldmFyZCBkZSBsYSBMaWJlcnTDqSwgNTk4MDAgTGlsbGUiXX0sIl9zZF9hbGciOi
JzaGEtMjU2IiwiaWQiOiJ1cm46dXVpZDozYWRkOTRmNC0yOGVjLTQyYTEtODcwNC00ZTRhYTUxMDA
2YjQiLCJ2YWxpZEZyb20iOiIyMDIxLTA4LTMxVDAwOjAwOjAwWiIsInR5cGUiOlsiVmVyaWZpYWJs
ZUNyZWRlbnRpYWwiLCJWZXJpZmlhYmxlQXR0ZXN0YXRpb24iLCJWZXJpZmlhYmxlSWQiXSwiaXNzd
WVkIjoiMjAyMS0wOC0zMVQwMDowMDowMFoiLCJAY29udGV4dCI6WyJodHRwczovL3d3dy53My5vcmc
vMjAxOC9jcmVkZW50aWFscy92MSJdLCJpc3N1ZXIiOiJkaWQ6ZWJzaToyQTlCWjlTVWU2QmF0YWNTc
HZzMVY1Q2RqSHZMcFE3YkVzaTJKYjZMZEhLblF4YU4ifQ.5TZ1n6iDHtW3lnKA_7ofSQ-BWyvEr39L
ThGdIc1OMgUejG6JF6blGkTqcoaQABQJKq6pFgkhjrYcpDG8QcObDA~WyJXeS11VjJDa216SmJ4NGt
jeTJQWjF3IiwiZGF0ZU9mQmlydGgiLCIxOTkzLTA0LTA4Il0~WyJXeS11VjJDa216SmJ4NGtjeTJQW
jF3IiwiZGF0ZU9mQmlydGgiLCIxOTkzLTA0LTA4Il0

#Verification In Action

API - Verify an SD-JWT VC using our verifier API.
Kotlin/Java - Verify an SD-JWT VC using our verifiable-credentials lib in Kotlin/Java.

Creation Of SD-JWT Credentials SD-JWT