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Technical Program

Paper Detail

Paper IDD4-S5-T4.2
Paper Title Private and Resource-Bounded Locally Decodable Codes for Insertions and Deletions
Authors Alexander R. Block, Jeremiah Blocki, Purdue University, United States
Session D4-S5-T4: Insertions/Deletions II
Chaired Session: Thursday, 15 July, 23:20 - 23:40
Engagement Session: Thursday, 15 July, 23:40 - 00:00
Abstract We construct locally decodable codes (LDCs) to correct insertion-deletion errors in the setting where the sender and receiver share a secret key or where the channel is resource-bounded. Our constructions rely on a so-called ``Hamming-to-InsDel'' compiler (Ostrovsky and Paskin-Cherniavsky, ITS '15 & Block et al., FSTTCS '20), which compiles any locally decodable Hamming code into a locally decodable code resilient to insertion-deletion (InsDel) errors. While the compilers were designed for the classical coding setting, we show that the compilers still work in a secret key or resource-bounded setting. Applying our results to the private key Hamming LDC of Ostrovsky, Pandey, and Sahai (ICALP '07), we obtain a private key InsDel LDC with constant rate and polylogarithmic locality. Applying our results to the construction of Blocki, Kulkarni, and Zhou (ITC '20), we obtain similar results for resource-bounded channels; i.e., a channel where computation is constrained by resources such as space or time.