Use any of the following
IZArc (free)
http://www.download.com/IZArc/3000-2250_4-10667135.html?tag=lst-0-1
http://www.izarc.org/
IZArc supports 256-bit AES encryption to secure your data.
If you have broken archives IZArc can help you to repair them with ease.
IZArc is the ultimate freeware archive utility supporting many archive formats like: 7-ZIP, A, ACE, ARC, ARJ, B64, BH, BIN, BZ2, BZA, C2D, CAB, CDI, CPIO, DEB, ENC, GCA, GZ, GZA, HA, IMG, ISO, JAR, LHA, LIB, LZH, MDF, MBF, MIM, NRG, PAK, PDI, PK3, RAR, RPM, TAR, TAZ, TBZ, TGZ, TZ, UUE, WAR, XXE, YZ1, Z, ZIP, ZOO.
IZArc: How to split large archive
http://www.izarc.org/tutorials.html#split
-------------------------------
7-Zip (free)
http://www.7-zip.org/
http://www.download.com/7-Zip/3000-2250_4-10634921.html?tag=lst-0-2
http://www.7-zip.org/7z.html
7-Zip supports encryption with the AES-256 algorithm. This algorithm uses a cipher key with a length of 256 bits. To create that key, 7-Zip runs a derivation function based on a SHA-256 hash algorithm. A key derivation function produces a derived key from the text password entered by the user. To increase the cost of an exhaustive search to crack a password, 7-Zip uses a large number of iterations when it produces a cipher key from a password.
Supported formats:
Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR;
Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM, Z, CPIO, RPM, DEB and NSIS. For ZIP and GZIP formats (includes GZ)
High compression ratio in new 7z format with LZMA compression provides compression ratio that is 2-10 % better than ratio provided by PKZip and WinZip.
To split with 7-zip, right click on file(s) or folder(s) and select "Add to Archive". Then select split to volume and select either 650MB CD or 700MB CD or enter bytes.
---------------------------
WinRAR (Free to try; $29.00 to buy )
http://www.win-rar.com/
WinRAR supports all popular compression formats (RAR, ZIP, CAB, ARJ, LZH, ACE, TAR, GZip, UUE, ISO, BZIP2, Z and 7-Zip).