Hi @gramsta I am trying to follow you, but I am getting Verify the JWS E256 signature using the server’s public key My codes are as follows - import io.jsonwebtoken.Claims; import io.jsonwebtoken.Jwts; import org.junit.jupiter.api.Test; import org.springframework.boot.web.client.RestTemplateBuilder; import java.math.BigInteger; import java.security.KeyFactory; import java.security.PublicKey; import java.security.spec.KeySpec; import java.security.spec.RSAPublicKeySpec; import java.util.Base64; import java.util.List; public class AppleTest { @Test public void test(String appleToken) throws Exception { AppleKeySet appleKeySet = new RestTemplateBuilder().build() .getForObject("https://appleid.apple.com/auth/keys", AppleKeySet.class); List<Key> applePublicKeys = appleKeySet.getKeys(); Key key = applePublicKeys.get(0); BigInteger n = new BigInteger(1, Base64.getUrlDecoder().decode(key.getN())); BigInteger e = new BigInteger(1, Base64.getUrlDecoder().decode(key.getE())); KeyFactory keyFactory = KeyFactory.getInstance("RSA"); KeySpec publicKeySpec = new RSAPublicKeySpec(n, e); PublicKey publicKey = keyFactory.generatePublic(publicKeySpec); Claims claims = Jwts.parser() .setSigningKey(publicKey) .parseClaimsJws(appleToken) .getBody(); } } Key POJO: import com.fasterxml.jackson.annotation.JsonInclude; import com.fasterxml.jackson.annotation.JsonProperty; import com.fasterxml.jackson.annotation.JsonPropertyOrder; import lombok.AllArgsConstructor; import lombok.Builder; import lombok.Data; import lombok.NoArgsConstructor; @Data @Builder @NoArgsConstructor @AllArgsConstructor @JsonInclude(JsonInclude.Include.NON_NULL) public class Key { @JsonProperty("kty") private String kty; @JsonProperty("kid") private String kid; @JsonProperty("use") private String use; @JsonProperty("alg") private String alg; @JsonProperty("n") private String n; @JsonProperty("e") private String e; } I am using implementation io.jsonwebtoken:jjwt:0.9.1 for JWT. What could be wrong? appleToken == JWT received during Sign In With Apple = Identity Token