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References from Privacy-preserving, user-centric VoIP CAPTCHA challenges. Local targets link to admitted publications; unresolved targets remain external evidence.
10.1145/966389.966390
10.1145/966389.966390 · External reference
10.1007/978-3-642-04117-4_15
10.1007/978-3-642-04117-4_15 · External reference
10.1007/978-3-642-17303-5_1
10.1007/978-3-642-17303-5_1 · External reference
10.1145/1518701.1518983
10.1145/1518701.1518983 · External reference
10.1109/sp.2010.31
10.1109/sp.2010.31 · External reference
10.1007/978-3-642-20317-6_5
10.1007/978-3-642-20317-6_5 · External reference
10.1145/1455770.1455814
10.1145/1455770.1455814 · External reference
10.1007/3-540-44987-6_7
10.1007/3-540-44987-6_7 · External reference
10.1007/978-3-540-69861-6_15
10.1007/978-3-540-69861-6_15 · External reference
10.1016/j.cose.2009.05.003
10.1016/j.cose.2009.05.003 · External reference
Unresolved reference
External reference
10.1007/978-3-540-69861-6_16
10.1007/978-3-540-69861-6_16 · External reference
10.1016/j.cose.2009.09.004
10.1016/j.cose.2009.09.004 · External reference
10.1109/ictta.2006.1684926
10.1109/ictta.2006.1684926 · External reference
10.1007/s12394-010-0075-6
10.1007/s12394-010-0075-6 · External reference
Unresolved reference
External reference
10.1016/j.comnet.2006.11.014
10.1016/j.comnet.2006.11.014 · External reference
10.1109/surv.2011.031611.00112
10.1109/surv.2011.031611.00112 · External reference
10.1145/2207676.2208385
10.1145/2207676.2208385 · External reference
10.1109/icccn.2007.4317883
10.1109/icccn.2007.4317883 · External reference
Unresolved reference
External reference
10.1109/msp.2011.148
10.1109/msp.2011.148 · External reference
10.1016/j.cose.2009.12.003
10.1016/j.cose.2009.12.003 · External reference
10.1109/ares.2011.29
10.1109/ares.2011.29 · External reference
10.1007/978-3-642-28879-1_10
10.1007/978-3-642-28879-1_10 · External reference
10.1109/msp.2005.62
10.1109/msp.2005.62 · External reference
10.1145/1408664.1408671
10.1145/1408664.1408671 · External reference
