How to turn the key to privacy
Wednesday 02 October 1996
Ciphertext can be encoded and decoded with two kinds of "keys": synchronous and asynchronous. With synchronous codes, the same key used to put encode is used to decode. A key is a long string of numbers and it is used by a mathematical algorithm to unlock the code.
Asynchronous codes use public and private keys. The same keys can't be used to lock and unlock a message. Everyone using a particular computer system has their own public and private keys. Public keys could be known by many people. Private keys are known only by the user.
- 1 California man brutally beat 82-year-old Sikh grandfather he mistook for 'one of those people'
- 3 Charles Kennedy 'had better judgement drunk than many sober politicians' says Ian Hislop
- 5 We have six months to save the world, says leading economist
California man brutally beat 82-year-old Sikh grandfather he mistook for 'one of those people'
Sepp Blatter resigns: FBI are investigating outgoing Fifa president, claims report
Alton Towers crash: Four seriously injured and 16 guests trapped as Smiler ride carriages collide
Gay teenager 'forced to have sex with his own mother' to 'cure' his homosexuality, campaigners in India say
Charles Kennedy 'had better judgement drunk than many sober politicians' says Ian Hislop
Thousands of teenage girls enduring debilitating illnesses after routine school cancer vaccination
Migrants in Kos: Photos show real tragedy after Brits abroad complain of 'awkward' holidays
British tourists complain that impoverished boat migrants are making holidays 'awkward' in Kos
Michael Gove determined to scrap the Human Rights Act – even if Scotland retains it
Threat to scrap Human Rights Act could see UK follow Nazi example, warns UN official
Church of England 'one generation away from extinction' after dramatic loss of followers
£35000 - £45000 per annum: Recruitment Genius: This company is a solutions / s...
£18000 - £45000 per annum: Recruitment Genius: A Sales Executive is required t...
£35000 - £40000 per annum: Recruitment Genius: Are you inspired to bring new a...
£14000 - £18000 per annum: Recruitment Genius: This is an exciting opportunity...