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Thursday, March 06, 2003 :::
 


I'm a member of the Planetary Society (planetary.org) and this was in the
latest magazine - devoted to interstellar travel. Friedman and Murray are
certainly serious space folk - but much more in the robot camp, especially
Murray, I think.

From "The Planetary Report" January/February 2003.

"Bridging the Gap: A Discussion with Freeman Dyson"

(interesting discussion about the ways and means of interstellar
travel. I like the end where Dyson gives an opinion about robots
versus astronauts)
....
Bruce Murray: I have one last point. We've been thinking about humans
migrating, and adapting in some form, to other worlds in this solar
system at least. There's an alternative possibility: to stay here and
send only sensors and surrogates elsewhere. I'm wondering, in the 30
to 40 years since you first began fantasizing about some thse things,
how do you feel about this alternative vision?

Freeman Dyson: Well, I detest it. It's quite possible that if we
decide to go that way, I will become a rebel and go off in my little
spaceship and leave everybody else behind. So, I hope we'll all be
rebels when the time comes.

Louis Friedman: so, you won't be satisfied sitting in some room with
a hologram of data pouring in?

Freeman: No. I will have lost any freedom that I may have had. It's
a matter of taste, of course, but I hope there will always be people
who rebel against that kind of thing.

Bruce: But it's so much easier to live here than elsewhere.

Lou: None of us, to quote John F. Kennedy, is "doing this because
it's easy, but becuse it's difficult."


::: posted by Joel at 8:18 AM




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/* Cryptography Javascript code written by John Walker (http://www.fourmilab.ch/javascrypt/). Modified by Vincent Cheung (http://veenix.blogspot.com/) July 17, 2006 */ /* >8)&0xFF); state[2][j]^=((roundKey[j]>>16)&0xFF);state[3][j]^=((roundKey[j]>>24)&0xFF);}} function keyExpansion(key){var expandedKey=new Array();var temp; Nk=keySizeInBits/32;Nb=blockSizeInBits/32;Nr=roundsArray[Nk][Nb];for(var j=0; j>8)&0xFF])|(SBox[(temp>>16)&0xFF]<<8)|(SBox[(temp>>24) &0xFF]<<16)|(SBox[temp&0xFF]<<24))^ Rcon[Math.floor(j/Nk)-1]; else if(Nk>6&&j%Nk==4)temp=(SBox[(temp>>24)&0xFF]<<24)|(SBox[(temp>>16) &0xFF]<<16)|(SBox[(temp>>8)&0xFF]<<8)|(SBox[temp&0xFF]); expandedKey[j]=expandedKey[j-Nk]^ temp;}return expandedKey;}function Round(state, roundKey){byteSub(state,"encrypt");shiftRow(state,"encrypt");mixColumn(state,"encrypt"); addRoundKey(state,roundKey);}function InverseRound(state,roundKey) {addRoundKey(state,roundKey);mixColumn(state,"decrypt");shiftRow(state,"decrypt"); byteSub(state,"decrypt");}function FinalRound(state,roundKey){byteSub(state,"encrypt"); shiftRow(state,"encrypt");addRoundKey(state,roundKey);} function InverseFinalRound(state,roundKey){addRoundKey(state,roundKey); shiftRow(state,"decrypt");byteSub(state,"decrypt");}function encrypt(block,expandedKey) {var i;if(!block||block.length*8!=blockSizeInBits)return;if(!expandedKey)return; block=packBytes(block);addRoundKey(block,expandedKey);for(i=1;i0;i--)InverseRound(block, expandedKey.slice(Nb*i,Nb*(i+1)));addRoundKey(block,expandedKey); return unpackBytes(block);}function byteArrayToHex(byteArray){var result=""; if(!byteArray)return;for(var i=0;i0) {plaintext=plaintext.concat(getRandomBytes(bpb-i));}return plaintext;} function getRandomBytes(howMany){var i,bytes=new Array();for(i=0;i0; block--){aBlock=decrypt(ciphertext.slice(block*bpb,(block+1)*bpb),expandedKey); if(mode=="CBC")for(var i=0;i */ /* =0){a=a%0x80000000;a>>=b;a+=0x40000000>>(b-1);}else{a>>=b;} return a;}function shl1(a){a=a%0x80000000;if(a&0x40000000==0x40000000) {a-=0x40000000;a*=2;a+=0x80000000;}else{a*=2;}return a;}function shl(a,b) {a=integer(a);b=integer(b);for(var i=0;i=0){if(t2>=0){return((t1&t2)+0x80000000);} else{return(t1&b);}}else{if(t2>=0){return(a&t2);}else{return(a&b);}}} function or(a,b){a=integer(a);b=integer(b);var t1=a-0x80000000; var t2=b-0x80000000;if(t1>=0){if(t2>=0){return((t1|t2)+0x80000000);} else{return((t1|b)+0x80000000);}}else{if(t2>=0){return((a|t2)+0x80000000);} else{return(a|b);}}}function xor(a,b){a=integer(a);b=integer(b); var t1=a-0x80000000;var t2=b-0x80000000;if(t1>=0){if(t2>=0){return(t1 ^ t2);} else{return((t1 ^ b)+0x80000000);}}else{if(t2>=0){return((a ^ t2)+0x80000000);} else{return(a ^ b);}}}function not(a){a=integer(a);return 0xffffffff-a;} var state=new array(4);var count=new array(2);count[0]=0;count[1]=0; var buffer=new array(64);var transformBuffer=new array(16); var digestBits=new array(16);var S11=7;var S12=12;var S13=17;var S14=22; var S21=5;var S22=9;var S23=14;var S24=20;var S31=4;var S32=11;var S33=16; var S34=23;var S41=6;var S42=10;var S43=15;var S44=21;function F(x,y,z) {return or(and(x,y),and(not(x),z));}function G(x,y,z){return or(and(x,z),and(y, not(z)));}function H(x,y,z){return xor(xor(x,y),z);}function I(x,y,z) {return xor(y,or(x,not(z)));}function rotateLeft(a,n){return or(shl(a,n),(shr(a, (32-n))));}function FF(a,b,c,d,x,s,ac){a=a+F(b,c,d)+x+ac;a=rotateLeft(a,s);a=a+b; return a;}function GG(a,b,c,d,x,s,ac){a=a+G(b,c,d)+x+ac;a=rotateLeft(a,s);a=a+b; return a;}function HH(a,b,c,d,x,s,ac){a=a+H(b,c,d)+x+ac;a=rotateLeft(a,s);a=a+b; return a;}function II(a,b,c,d,x,s,ac){a=a+I(b,c,d)+x+ac;a=rotateLeft(a,s);a=a+b; return a;}function transform(buf,offset){var a=0,b=0,c=0,d=0; var x=transformBuffer;a=state[0];b=state[1];c=state[2];d=state[3];for(i=0;i<16; i++){x[i]=and(buf[i*4+offset],0xFF);for(j=1;j<4;j++) {x[i]+=shl(and(buf[i*4+j+offset],0xFF),j*8);}}a=FF(a,b,c,d,x[0],S11,0xd76aa478); d=FF(d,a,b,c,x[1],S12,0xe8c7b756);c=FF(c,d,a,b,x[2],S13,0x242070db);b=FF(b,c,d,a, x[3],S14,0xc1bdceee);a=FF(a,b,c,d,x[4],S11,0xf57c0faf);d=FF(d,a,b,c,x[5],S12, 0x4787c62a);c=FF(c,d,a,b,x[6],S13,0xa8304613);b=FF(b,c,d,a,x[7],S14,0xfd469501); a=FF(a,b,c,d,x[8],S11,0x698098d8);d=FF(d,a,b,c,x[9],S12,0x8b44f7af);c=FF(c,d,a,b, x[10],S13,0xffff5bb1);b=FF(b,c,d,a,x[11],S14,0x895cd7be);a=FF(a,b,c,d,x[12],S11, 0x6b901122);d=FF(d,a,b,c,x[13],S12,0xfd987193);c=FF(c,d,a,b,x[14],S13,0xa679438e) ;b=FF(b,c,d,a,x[15],S14,0x49b40821);a=GG(a,b,c,d,x[1],S21,0xf61e2562);d=GG(d,a,b, c,x[6],S22,0xc040b340);c=GG(c,d,a,b,x[11],S23,0x265e5a51);b=GG(b,c,d,a,x[0],S24, 0xe9b6c7aa);a=GG(a,b,c,d,x[5],S21,0xd62f105d);d=GG(d,a,b,c,x[10],S22,0x2441453); c=GG(c,d,a,b,x[15],S23,0xd8a1e681);b=GG(b,c,d,a,x[4],S24,0xe7d3fbc8);a=GG(a,b,c, d,x[9],S21,0x21e1cde6);d=GG(d,a,b,c,x[14],S22,0xc33707d6);c=GG(c,d,a,b,x[3],S23, 0xf4d50d87);b=GG(b,c,d,a,x[8],S24,0x455a14ed);a=GG(a,b,c,d,x[13],S21,0xa9e3e905); d=GG(d,a,b,c,x[2],S22,0xfcefa3f8);c=GG(c,d,a,b,x[7],S23,0x676f02d9);b=GG(b,c,d,a, x[12],S24,0x8d2a4c8a);a=HH(a,b,c,d,x[5],S31,0xfffa3942);d=HH(d,a,b,c,x[8],S32, 0x8771f681);c=HH(c,d,a,b,x[11],S33,0x6d9d6122);b=HH(b,c,d,a,x[14],S34,0xfde5380c) ;a=HH(a,b,c,d,x[1],S31,0xa4beea44);d=HH(d,a,b,c,x[4],S32,0x4bdecfa9);c=HH(c,d,a, b,x[7],S33,0xf6bb4b60);b=HH(b,c,d,a,x[10],S34,0xbebfbc70);a=HH(a,b,c,d,x[13],S31, 0x289b7ec6);d=HH(d,a,b,c,x[0],S32,0xeaa127fa);c=HH(c,d,a,b,x[3],S33,0xd4ef3085); b=HH(b,c,d,a,x[6],S34,0x4881d05);a=HH(a,b,c,d,x[9],S31,0xd9d4d039);d=HH(d,a,b,c, x[12],S32,0xe6db99e5);c=HH(c,d,a,b,x[15],S33,0x1fa27cf8);b=HH(b,c,d,a,x[2],S34, 0xc4ac5665);a=II(a,b,c,d,x[0],S41,0xf4292244);d=II(d,a,b,c,x[7],S42,0x432aff97); c=II(c,d,a,b,x[14],S43,0xab9423a7);b=II(b,c,d,a,x[5],S44,0xfc93a039);a=II(a,b,c, d,x[12],S41,0x655b59c3);d=II(d,a,b,c,x[3],S42,0x8f0ccc92);c=II(c,d,a,b,x[10],S43, 0xffeff47d);b=II(b,c,d,a,x[1],S44,0x85845dd1);a=II(a,b,c,d,x[8],S41,0x6fa87e4f); d=II(d,a,b,c,x[15],S42,0xfe2ce6e0);c=II(c,d,a,b,x[6],S43,0xa3014314);b=II(b,c,d, a,x[13],S44,0x4e0811a1);a=II(a,b,c,d,x[4],S41,0xf7537e82);d=II(d,a,b,c,x[11],S42, 0xbd3af235);c=II(c,d,a,b,x[2],S43,0x2ad7d2bb);b=II(b,c,d,a,x[9],S44,0xeb86d391); state[0]+=a;state[1]+=b;state[2]+=c;state[3]+=d;}function md5_init() {count[0]=count[1]=0;state[0]=0x67452301;state[1]=0xefcdab89;state[2]=0x98badcfe; state[3]=0x10325476;for(i=0;i=63){transform(buffer,0);}} function md5_finish(){var bits=new array(8);var padding;var i=0,index=0,padLen=0; for(i=0;i<4;i++){bits[i]=and(shr(count[0],(i*8)),0xFF);}for(i=0;i<4;i++) {bits[i+4]=and(shr(count[1],(i*8)),0xFF);}index=and(shr(count[0],3),0x3F); padLen=(index<56)?(56-index):(120-index);padding=new array(64);padding[0]=0x80; for(i=0;i */ /* maxLineLength){b64t+=b64l+"\n";b64l="";} b64l+=base64code.charAt(b[i]>>2);b64l+=base64code.charAt(((b[i]&3)<<4) |(b[i+1]>>4));b64l+=base64code.charAt(((b[i+1]&0xF)<<2)|(b[i+2]>>6)); b64l+=base64code.charAt(b[i+2]&0x3F);}if((b.length-i)==1) {b64l+=base64code.charAt(b[i]>>2);b64l+=base64code.charAt(((b[i]&3)<<4)); b64l+="==";}else if((b.length-i)==2){b64l+=base64code.charAt(b[i]>>2); b64l+=base64code.charAt(((b[i]&3)<<4)|(b[i+1]>>4)); b64l+=base64code.charAt(((b[i+1]&0xF)<<2));b64l+="=";}if((b64l.length+4) >maxLineLength){b64t+=b64l+"\n";b64l="";}if(base64addsent) {b64l+=base64esent;}b64t+=b64l+"\n";return b64t;}function disarm_base64(s) {var b=new Array();var i=0,j,c,shortgroup=0,n=0;var d=new Array(); if((j=s.indexOf(base64sent))>=0){s=s.substring(j+base64sent.length,s.length);} if((j=s.indexOf(base64esent))>=0){s=s.substring(0,j);}while(i=s.length){if(j>0){ //alert("Base64 cipher text truncated."); return b;}break;} c=base64code.indexOf(s.charAt(i));if(c>=0){d[j++]=c;}else if(s.charAt(i)=="=") {d[j++]=0;shortgroup++;}else if(s.substring(i,i+base64esent.length)==base64esent) {i=s.length;continue;}else{}i++;}if(j==4){b[n++]=((d[0]<<2)|(d[1]>>4))&0xFF; if(shortgroup<2){b[n++]=((d[1]<<4)|(d[2]>>2))&0xFF;if(shortgroup<1) {b[n++]=((d[2]<<6)|d[3])&0xFF;}}}}return b;} /* ]]> */ /* =0x80)&&(c<=0x7FF)){utf8+=String.fromCharCode((c>>6)|0xC0); utf8+=String.fromCharCode((c&0x3F)|0x80);}else{utf8+=String.fromCharCode((c>>12) |0xE0);utf8+=String.fromCharCode(((c>>6)&0x3F)|0x80); utf8+=String.fromCharCode((c&0x3F)|0x80);}}return utf8;} function utf8_to_unicode(utf8){var s="",i=0,b1,b2,b2;while(i=0xC0)&&(b1<0xE0)){b2=utf8.charCodeAt(i+1); s+=String.fromCharCode(((b1&0x1F)<<6)|(b2&0x3F));i+=2;} else{b2=utf8.charCodeAt(i+1);b3=utf8.charCodeAt(i+2); s+=String.fromCharCode(((b1&0xF)<<12)|((b2&0x3F)<<6)|(b3&0x3F));i+=3;}}return s;} function encode_utf8(s){var i,necessary=false;for(i=0;i0xFF)){necessary=true;break;}} if(!necessary){return s;}return String.fromCharCode(0x9D)+unicode_to_utf8(s);} function decode_utf8(s){if((s.length>0)&&(s.charCodeAt(0)==0x9D)) {return utf8_to_unicode(s.substring(1));}return s;} /* ]]> */ /* ').replace(/\\n/g,'
'); keyText = prompt("Please enter the decryption key", ""); setKey(keyText); var ct=new Array(); // remove line breaks ct=disarm_base64(encryptedText.replace(/
/gi, "").replace(/
/gi, "").replace(/\\n/gi, "")); var result=rijndaelDecrypt(ct,key,"CBC"); var header=result.slice(0,20); result=result.slice(20); var dl=(header[16]<<24)|(header[17]<<16)|(header[18]<<8)|header[19]; if((dl<0)||(dl>result.length)) { // alert("Message (length "+result.length+") truncated. "+dl+" characters expected."); dl=result.length; } var i,plaintext=""; md5_init(); for(i=0;i')); } /* ]]> */