Vikram Hegde, Hanqing Zhao, Kefeng Shi, and Yi Yang Fontbonne University St. Louis, Missouri
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1 SECURE MOBILE APPS BASED ON NTRU Vikram Hegde, Hanqing Zhao, Kefeng Shi, and Yi Yang Fontbonne University St. Louis, Missouri
2 The need for mobile security The inefficiency of traditional algorithms in mobile apps (e.g. RSA)
3 Server generates the cryptographic key Users purchase the cryptographic key Slow and unsecure
4 We apply the peer-to-peer method Use NTRU algorithm Fast and secure
5 NTRU (N-th Degree Truncated Polynomial Ring) A patented, open source public-key cryptosystem First public-key cryptosystem not based on factorization (such as RSA) or discrete logarithmic problems (ECC) Resistant to attacks using Shor s algorithm in a quantum computer (unlike RSA and ECC) Less resource usage (memory, CPU)
6 [1]
7 Download and Install: Java NTRU library (including Benchmark app source code) from Eclipse IDE, Android SDK and Android Tools for Eclipse (on PC) CmdConsole(on Android device) Java NTRU Library Eclipse Android SDK Android Tools For Eclipse CmdConsole
8 Compile source code for benchmark app included with NTRU library Install CmdConsole on mobile device to run the benchmark app Install benchmark app on phone Execute benchmark app inside CmdConsole using run command
![How CmdConsole works [2] http://www.codeproject.](/docs-images/77/75120891/images/9-0.jpg "com/articles/202996/write-a-console-app-on-")
9 How CmdConsole works [2] Android-using-Java
10 We tested our results on a Samsung Galaxy S6 edge+ and Samsung Galaxy Express Samsung Galaxy Express Released 2012, November Chipset CPU OS Qualcomm MSM8960 Snapdragon S4 Plus Dual-core 1.5 GHz Krait Android Samsung Galaxy S6 Edge+ Released 2015, August Chipset CPU Exynos7420 Octa Octa-core (4x2.1 GHz Cortex A57 & 4x1.5 GHz Cortex-A53) OS Android 6.0.1
11 SAMSUNG GALAXY EXPRESS 4000 Key Generation Time (ms/op) ms/op RSA-2048 Curve25519 (256 bits) ECDH-256 ECDH-521 NTRU-439 NTRU-743 Algorithm / Key Size (or NTRU Parameter Set)
12 SAMSUNG GALAXY EXPRESS ms/op Encryption/Decryption Time (ms/op) RSA-2048 RSA-4096 Curve25519 (256 bits) ECDH-256 ECDH-521 NTRU-439 NTRU-743 Algorithm / Key Size (or NTRU Parameter Set) Encryption Time (ms/op) Decryption Time (ms/op)
13 Algorithms 1. RSA RSA RSA : Excluded (ECC) 7. NTRU NTRU-743 Algorithm / Key Size (or NTRU Parameter Set)
14 COMPARISON OF PERFORMANCE/SECURITY (SAMSUNG GALAXY EXPRESS) Symmetric Security Level (bits) [3] Algorithm/Key Size (or RSA Modulus, or NTRU Param. Set) Key Generation Time (ms/op) Encryption Time (ms/op) Decryption Time (ms/op) Ciphertext Length (bytes) 112 RSA RSA RSA Curve25519 (256 bits) N/A 128 ECDH N/A 256 ECDH N/A 128 NTRU NTRU
15 SAMSUNG GALAXY S6 EDGE+ 700 Key Generation Time (ms/op) ms/op RSA-2048 Curve25519 (256 bits) ECDH-256 ECDH-521 NTRU-439 NTRU-743 Algorithm / Key Size (or NTRU Parameter Set)
16 SAMSUNG GALAXY S6 EDGE+ ms/op Encryption/Decryption Time (ms/op) RSA-2048 RSA-4096 Curve25519 (256 bits) ECDH-256 ECDH-521 NTRU-439 NTRU-743 Algorithm / Key Size (or NTRU Parameter Set) Encryption Time (ms/op) Decryption Time (ms/op)
17 COMPARISON OF PERFORMANCE/SECURITY (SAMSUNG GALAXY S6 EDGE+) Symmetric Security Level (bits) [3] Algorithm/Key Size (or RSA Modulus,or NTRU Param. Set) Key Generation Time (ms/op) Encryption Time (ms/op) Decryption Time (ms/op) CiphertextLength (bytes) 112 RSA RSA RSA Curve25519 (256 bits) N/A 128 ECDH N/A 256 ECDH N/A 128 NTRU NTRU
18 NTRU had the best balance of performance and security. It had the fastest encryption and decryption times, the longest cipher text, and was the only algorithm we benchmarked that is resistant to attacks by quantum computers using Shor s algorithm. The ECC algorithms had the shortest key generation time, but they had the slowest encryption, and decryption was slower than NTRU at a given security level. RSA had the slowest key generation, the slowest decryption, and encryption was pretty fast
19 Build an app for Android and/or ios that uses NTRU to encrypt peer-to-peer communication. Do benchmarks using other implementations of NTRU
20 [1] Buktu, T. (n.d.). NTRU: Quantum-Resistant High Performance Cryptography. Retrieved April 2, 2016, from [2] C. (2011, May 30). Write a Console App on Android using Java. Retrieved April 13, 2016, from Android-using-Java [3] NTRUEncryptSDK for C/C User's Notes[PDF]. (2013, September). Security Innovation, Inc.
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