A good block cipher exhibits avalanche effect: if we flip one bit in the plain text, half of the bits are flipped in the cipher text. Two messages of the same length, m1 and m2, differ by 5 bits. With a good block cipher, how many bits differ in the two resulting cipher texts?

leaning back,   no eye contact,   fidgeting in the seat

i would first let him be aware that a cover letter is official and confidential and it requires a proper formatting so that the employer doesn't have hard time when going through it. he should write it in paragraphs of about two to four sentences and use proper grammar a , spelling and proper punctuation. i will also advice him not to be emotional and not also to use images.then base his attention to the details of the job described and not other things. that is he be specific to the responsibilities and to the employers requirements. on this he should make sure that the letter reflects how good he is for the requirements detailed by the employer

the letter should not be too long nor too short.