diff --git a/cas/src/main/java/org/springframework/security/cas/authentication/CasAuthenticationToken.java b/cas/src/main/java/org/springframework/security/cas/authentication/CasAuthenticationToken.java
index 17eb48e416..c05d5c5964 100644
--- a/cas/src/main/java/org/springframework/security/cas/authentication/CasAuthenticationToken.java
+++ b/cas/src/main/java/org/springframework/security/cas/authentication/CasAuthenticationToken.java
@@ -23,7 +23,6 @@ import org.apereo.cas.client.validation.Assertion;
 import org.jspecify.annotations.Nullable;
 
 import org.springframework.security.authentication.AbstractAuthenticationToken;
-import org.springframework.security.core.Authentication;
 import org.springframework.security.core.GrantedAuthority;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.util.Assert;
@@ -183,7 +182,7 @@ public class CasAuthenticationToken extends AbstractAuthenticationToken implemen
 	}
 
 	/**
-	 * A builder preserving the concrete {@link Authentication} type
+	 * A builder of {@link CasAuthenticationToken} instances
 	 *
 	 * @since 7.0
 	 */
@@ -208,8 +207,13 @@ public class CasAuthenticationToken extends AbstractAuthenticationToken implemen
 			this.assertion = token.assertion;
 		}
 
-		public B keyHash(Integer keyHash) {
-			this.keyHash = keyHash;
+		/**
+		 * Use this key
+		 * @param key the key to use
+		 * @return the {@link Builder} for further configurations
+		 */
+		public B key(String key) {
+			this.keyHash = key.hashCode();
 			return (B) this;
 		}
 
@@ -227,11 +231,21 @@ public class CasAuthenticationToken extends AbstractAuthenticationToken implemen
 			return (B) this;
 		}
 
+		/**
+		 * Use this {@link UserDetails}
+		 * @param userDetails the {@link UserDetails} to use
+		 * @return the {@link Builder} for further configurations
+		 */
 		public B userDetails(UserDetails userDetails) {
 			this.userDetails = userDetails;
 			return (B) this;
 		}
 
+		/**
+		 * Use this {@link Assertion}
+		 * @param assertion the {@link Assertion} to use
+		 * @return the {@link Builder} for further configurations
+		 */
 		public B assertion(Assertion assertion) {
 			this.assertion = assertion;
 			return (B) this;
diff --git a/cas/src/main/java/org/springframework/security/cas/authentication/CasServiceTicketAuthenticationToken.java b/cas/src/main/java/org/springframework/security/cas/authentication/CasServiceTicketAuthenticationToken.java
index 27a9996045..0337bafaf9 100644
--- a/cas/src/main/java/org/springframework/security/cas/authentication/CasServiceTicketAuthenticationToken.java
+++ b/cas/src/main/java/org/springframework/security/cas/authentication/CasServiceTicketAuthenticationToken.java
@@ -22,7 +22,6 @@ import java.util.Collection;
 import org.jspecify.annotations.Nullable;
 
 import org.springframework.security.authentication.AbstractAuthenticationToken;
-import org.springframework.security.core.Authentication;
 import org.springframework.security.core.GrantedAuthority;
 import org.springframework.util.Assert;
 
@@ -122,7 +121,7 @@ public class CasServiceTicketAuthenticationToken extends AbstractAuthenticationT
 	}
 
 	/**
-	 * A builder preserving the concrete {@link Authentication} type
+	 * A builder of {@link CasServiceTicketAuthenticationToken} instances
 	 *
 	 * @since 7.0
 	 */
diff --git a/cas/src/test/java/org/springframework/security/cas/authentication/CasAuthenticationTokenTests.java b/cas/src/test/java/org/springframework/security/cas/authentication/CasAuthenticationTokenTests.java
index d489d00ff3..506497124d 100644
--- a/cas/src/test/java/org/springframework/security/cas/authentication/CasAuthenticationTokenTests.java
+++ b/cas/src/test/java/org/springframework/security/cas/authentication/CasAuthenticationTokenTests.java
@@ -167,7 +167,7 @@ public class CasAuthenticationTokenTests {
 				AuthorityUtils.createAuthorityList("FACTOR_TWO"), PasswordEncodedUser.admin(), assertionTwo);
 		CasAuthenticationToken authentication = factorOne.toBuilder()
 			.authorities((a) -> a.addAll(factorTwo.getAuthorities()))
-			.keyHash(factorTwo.getKeyHash())
+			.key("yek")
 			.principal(factorTwo.getPrincipal())
 			.credentials(factorTwo.getCredentials())
 			.userDetails(factorTwo.getUserDetails())