For every pixel of a block, least significant bit (LSB) substitution is applied on two LSBs and quotient value differencing (QVD) is applied on the remaining six bits.
Thus, there are two levels of embedding: (i) LSB substitution at lower bit planes and (ii) QVD at higher bit planes.
Of course, Carmen’s mom doesn’t always understand the social protocols on Facebook and Carmen sometimes gets frustrated.
She hates that her mom comments on nearly every post, because it “scares everyone away…Everyone kind of disappears after the mom post…It’s just uncool having your mom all over your wall.
When Carmen broke up with her boyfriend, she “wasn’t in the happiest state.” The breakup happened while she was on a school trip and her mother was already nervous.
Initially, Carmen was going to mark the breakup with lyrics from a song that she had been listening to, but then she realized that the lyrics were quite depressing and worried that if her mom read them, she’d “have a heart attack and think that something is wrong.” She decided not to post the lyrics.
Children love employing codes and adults generally pretend as though they can’t understand pig Latin or uncover the messages that children hide using invisible ink pens purchased from toy stores.
Yet, as children grow up, they get more mature about their messaging, realizing that language has multiple layers and, with it, multiple meanings. What fascinates me is that teens are taking these strategies into the digital spaces, recognizing multiple audiences and the challenges of persistence, and working to speak in layers. And things that are meant to mean one thing are often misinterpreted in all sorts of the wrong ways.
She’s communicating to different audiences simultaneously, relying on specific cultural awareness to provide the right interpretive lens.
While she’s focused primarily on separating her mother from her friends, her message is also meaningless to broader audiences who have no idea that she had just broken up with her boyfriend.