@interface NEVPNIKEv1ProposalParameters : NSObject <NEConfigurationValidating, NEPrettyDescription, NEConfigurationLegacySupport, NSSecureCoding, NSCopying>

@property (class, readonly) BOOL supportsSecureCoding;

@property long long encryptionAlgorithm;
@property long long integrityAlgorithm;
@property int diffieHellmanGroup;
@property int lifetimeSeconds;

- (id)initFromLegacyDictionary:(id)a0;
- (BOOL)checkValidityAndCollectErrors:(id)a0;
- (id)init;
- (id)descriptionWithIndent:(int)a0 options:(unsigned long long)a1;
- (void)encodeWithCoder:(id)a0;
- (id)initWithCoder:(id)a0;
- (id)copyLegacyDictionary;
- (id)copyWithZone:(struct _NSZone { } *)a0;

@end