System/Library/PrivateFrameworks/SecurityFoundation.framework

SFIESCiphertext_Ivars.h

NSObject

@class NSData, _SFECPublicKey;

@interface SFIESCiphertext_Ivars : NSObject {
    _SFECPublicKey *ephemeralSenderPublicKey;
    NSData *authenticationCode;
}

- (void).cxx_destruct;

@end