In a published letter, the Article 29 Working Party (A29 WP) indicated that the voluntary guidelines drafted by a European digital advertising industry group do not meet the consent and information requirements laid out in the ePrivacy Directive, PCWorld reports. The European Advertising Standard Alliance (EASA) backs an icon-based approach to inform users of how the targeted advertisement works. A29 WP Chairman Jacob Kohnstamm said, though the icon helps raise awareness, a browser-based do-not-track (DNT) protocol is needed, adding, "A DNT setting in a browser means that users should no longer be tracked instead of just not being shown targeted advertisements."  
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