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ÇѱÛÁ¦¸ñ(Korean Title) |
¸ð¹ÙÀÏ ¸ÖƼ¹Ìµð¾î µ¥ÀÌŸ¸¦ À§ÇÑ, Àǻ糼ö»ý¼º±â¿Í ¼ø¿ ±â¹ýÀ» °áÇÕÇÑ È¿À²ÀûÀÎ ¾ÏÈ£È ±â¹ý |
¿µ¹®Á¦¸ñ(English Title) |
An Efficient Encryption Scheme Combining PRNG and Permutation for Mobile Multimedia Data |
ÀúÀÚ(Author) |
ÇÑÁ¤±Ô
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¿ø¹®¼ö·Ïó(Citation) |
VOL 34 NO. 11 PP. 0581 ~ 0588 (2007. 12) |
Çѱ۳»¿ë (Korean Abstract) |
µðÁöÅÐ ÀúÀÛ±Ç °ü¸® ±â¹ýÀº °è»êºñ¿ëÀÇ °æ°¨À» ¸ñÀûÀ¸·Î ÄÁÅÙÃ÷ ¾Ïȣȸ¦ À§ÇØ ´ëĪ Å° ¾ÏÈ£È ±â¹ýÀ» äÅÃÇÏ¿´À¸¸ç µ¥½ºÅ©Å¾ ȯ°æ¿¡¼´Â °ÇÑ º¸¾È¼º°ú ÀûÀýÇÑ ¾ÏÈ£È ¼Óµµ¸¦ °¡Áö´Â AES¸¦ ÁÖ·Î »ç¿ëÇÏ°í ÀÖ´Ù. ±×·¯³ª ³·Àº ¼º´ÉÀÇ ÇÁ·Î¼¼¼¿Í Á¦ÇÑµÈ Àü·Âȯ°æ¿¡¼ µ¿ÀÛÇÏ´Â ¸ð¹ÙÀÏ ±â±â¿¡¼´Â ´õ¿í ³·Àº °è»ê ºñ¿ë ½ÇÇö°ú ¿¡³ÊÁö ¼Ò¸ð °æ°¨À» ¿ä±¸ÇÑ´Ù. ÀÌ¿¡ º» ³í¹®¿¡¼´Â ¸ð¹ÙÀÏ ±â±â¿¡¼ »ç¿ë °¡´ÉÇÑ È¿À²ÀûÀÎ ½ºÆ®¸² ¾ÏÈ£È ±â¹ýÀ» Á¦¾ÈÇÑ´Ù. Á¦¾È ±â¹ýÀº ÀÇ»ç ³¼ö »ý¼º±â¸¦ »ç¿ëÇÏ¿© ¿øº» Å° ½ºÆ®¸²À» »ý¼ºÇÑ ´ÙÀ½ ÀÌ¿¡ µ¿Àû »ý¼ºÇÑ ¼ø¿À» Àû¿ëÇÏ¿© È®Àå Å° ½ºÆ®¸²À» »ý¼ºÇÑ´Ù. È®Àå Å° ½ºÆ®¸²À» Æò¹®°ú ³í¸®ÇÕÇÏ¿© ¾ÏÈ£¹®À» »ý¼ºÇÑ´Ù. ¼ø¿À» ÀÌ¿ëÇÏ¿© Å° ½ºÆ®¸² »ý¼º¿¡ »ç¿ëµÇ´Â ÀÇ»ç ³¼ö »ý¼º±âÀÇ »ç¿ë Ƚ¼ö¸¦ ÁÙ¿´±â ¶§¹®¿¡ ÀÏ¹Ý ½ºÆ®¸² ¾ÏÈ£È ±â¹ý¿¡ ºñÇØ ¸ÖƼ¹Ìµð¾î µ¥ÀÌŸÀÇ ¾Ï/º¹È£È ¼Óµµ°¡ ºü¸£¸ç ¿¡³ÊÁö ¼Ò¸ð¸¦ ÁÙ¿´´Ù. ƯÈ÷ Á¦¾È ±â¹ýÀº ¸ÖƼ¹Ìµð¾î ÆÄÀÏÀÇ ÀÓÀÇ Á¢±Ù ½Ã ÀÏ¹Ý ½ºÆ®¸² ¾ÏÈ£È ±â¹ý¿¡ ºñÇØ ¾à 2¹èÀÇ ¼ÓµµÇâ»óÀ» º¸ÀδÙ. |
¿µ¹®³»¿ë (English Abstract) |
In Digital Right Management, symmetric cipher is used for content encryption to reduce encryption cost, AES, advanced encryption standard is usually used to multimedia encryption under desktop environment because of its reasonable security level and computation cost. But mobile handheld device often uses slow speed processor and operates under battery-powered environment. Therefore it requires low computation cost and low energy consumption. This paper proposes new stream cipher scheme which combines pseudo random number generator(PRNG) and dynamically generated permutations. Proposed scheme activates PRNG and generates original key streams. Then it generates extended key streams by applying permutation to original sequence. These extended key streams are XORed with plaintext and generate ciphertext. Proposed scheme reduces the usage of PRNG. Therefore this scheme is fast and consumes less energy in comparison with normal stream cipher. Especially, this scheme shows great speed up (almost 2 times) than normal stream cipher scheme in random access. |
Å°¿öµå(Keyword) |
¸ÖƼ¹Ìµð¾î ¾ÏÈ£È
½ºÆ®¸² ¾ÏÈ£È ±â¹ý
¸ð¹ÙÀÏ µðÁöÅÐ ÀúÀÛ±Ç °ü¸®
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Multimedia encryption
Stream cipher
Mobile Digital Right Management
Permutation
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